Journal of Digital Imaging
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Automatic Detection of Microaneurysms and Hemorrhages in Digital Fundus Images
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Abstract An efficient approach for automatic detection of red lesions in ocular fundus images based on pixel classification and mathematical
morphology is proposed. Experimental evaluation of the proposed approach demonstrates better performance over other red lesion
detection algorithms, and when determining whether an image contains red lesions the proposed approach achieves a sensitivity
of 100% and specificity of 91%.
Content Type Journal ArticleDOI 10.1007/s10278-009-9246-0Authors
Giri Babu Kande, Vasireddy Venkatadri Institute of Technology Nambur 522508 Guntur Andhra Pradesh IndiaT. Satya Savithri...
Source: Journal of Digital Imaging - November 17, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Data Management Solution for Large-Volume Computed Tomography in an Existing Picture Archiving and Communication System (PACS)Email this article to a colleague.
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Abstract Multidetector row computed tomography (MDCT) creates massive amounts of data, which can overload a picture archiving and communication
system (PACS). To solve this problem, we designed a new data storage and image interpretation system in an existing PACS.
Two MDCT image datasets, a thick- and a thin-section dataset, and a single-detector CT thick-section dataset were reconstructed.
The thin-section dataset was archived in existing PACS disk space reserved for temporary storage, and the system overwrote
the source data to preserve available disk space. The thick-section datasets were archived perman...
Source: Journal of Digital Imaging - November 12, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Should Medical Schools Incorporate Formal Training in Informatics?Email this article to a colleague.
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Abstract Are we preparing future generations of physicians with the skills to practice in the information age? Has the health care
IT industry matured to the stage that we can standardize training physicians in how to search and synthesize massive databases
of clinical information and tease out complex diagnoses based upon scant information? Will literacy in information technology
become a differentiator between physicians’ abilities? For the proposition of changing existing curriculum in medical schools
to incorporate formal informatics training is Michael Chen, a second year medical student at the Univer...
Source: Journal of Digital Imaging - November 11, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Evaluation of Negation and Uncertainty Detection and its Impact on Precision and Recall in SearchEmail this article to a colleague.
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We describe RadReportMiner, a context-aware search engine, and compare its retrieval
performance with a generic search engine, Google Desktop. We created a corpus of 464 radiology reports which described at
least one of five findings (appendicitis, hydronephrosis, fracture, optic neuritis, and pneumonia). Each report was classified
by a radiologist as positive (finding described to be present) or negative (finding described to be absent or uncertain).
The same reports were then classified by RadReportMiner and Google Desktop. RadReportMiner achieved a higher precision (81%),
compared with Google Desktop (27%; p <...
Source: Journal of Digital Imaging - November 10, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Evaluating Eyegaze Targeting to Improve Mouse Pointing for Radiology TasksEmail this article to a colleague.
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Abstract In current radiologists’ workstations, a scroll mouse is typically used as the primary input device for navigating image slices
and conducting operations on an image. Radiological analysis and diagnosis rely on careful observation and annotation of medical
images. During analysis of 3D MRI and CT volumes, thousands of mouse clicks are performed everyday, which can cause wrist
fatigue. This paper presents a dynamic control-to-display (C-D) gain mouse movement method, controlled by an eyegaze tracker
as the target predictor. By adjusting the C-D gain according to the distance to the target, the mous...
Source: Journal of Digital Imaging - November 10, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Novel Computer-Aided Diagnosis Algorithms on Ultrasound Image: Effects on Solid Breast Masses DiscriminationEmail this article to a colleague.
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The objective of this study is to retrospectively investigate whether using the newly developed algorithms would improve radiologists’
accuracy for discriminating malignant masses from benign ones on ultrasonographic (US) images. Five radiologists blinded to
the histological results and clinical history independently interpreted 226 cases according to the sonographic lexicon of
the fourth edition of the Breast Imaging Reporting and Data System and assigned a final assessment category to indicate the
probability of malignancy. For each case, each radiologist provided three diagnoses: first with the original images, su...
Source: Journal of Digital Imaging - November 10, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
One Year’s Results from a Server-Based System for Performing Reject Analysis and Exposure Analysis in Computed RadiographyEmail this article to a colleague.
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We present a
centralized, server-based solution for the collection, archival, and distribution of rejected image and exposure indicator
data that automates the data collection process. Reject analysis program (RAP) and exposure indicator data were collected
and analyzed during a 1-year period. RAP data were sorted both by reason for repetition and body part examined. Data were
also stratified by clinical area for further investigation. The monthly composite reject rate for our institution fluctuated
between 8% and 10%. Positioning errors were the main cause of repeated images (77.3%). Stratification of data by clinica...
Source: Journal of Digital Imaging - November 3, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Enterprise-scale image distribution with a Web PACSEmail this article to a colleague.
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Abstract The integration of images with existing and new health care information systems poses a number of challenges in a multi-facility
network: image distribution to clinicians; making DICOM image headers consistent across information systems; and integration
of teleradiology into PACS. A novel, Web-based enterprise PACS architecture introduced at Massachusetts General Hospital provides
a solution. Four AMICAS Web/Intranet Image Servers were installed as the default DICOM destination of 10 digital modalities.
A fifth AMICAS receives teleradiology studies via the Internet. Each AMICAS includes: a Java-base...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Updating a legacy PACS: Experience with hardware and operational integration during transition to a new architectureEmail this article to a colleague.
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Conclusion The transition of the WVUH PACS to a new configuration that can support filmless radiology has been delayed by several “midcourse”
corrections on the part of the primary PACS vendor. If the current product development time lines are reliable, then it will
have been an 8 year process that will allow WVUH to be a filmless hospital in time for the next millennium.
Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168247Authors
John C. Weiser, West Virginia University Medical Physics Section, Department of Radiology, Robert C. Byrd Health Sciences Center 26506-8150 Morgantown WVDan J...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Acceptance testing for the MICAS, a multi-vendor incremental approach to PACSEmail this article to a colleague.
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Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168248Authors
Edward M. Smith, University of Rochester Medical Center Department of Radiology 14642 Rochester NYJeffrey Wright, University of Rochester Medical Center Department of Radiology 14642 Rochester NYMarc T. Fontaine, University of Rochester Medical Center Department of Radiology 14642 Rochester NYCharles O’Brien, University of Rochester Medical Center Department of Radiology 14642 Rochester NYDora Rosser, University of Rochester Medical Center Department of Radiology 14642 Rochester NYThomas Kohler, University of Rochester Medical Center Departmen...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
SCAR 98 Program CommitteeEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168245
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 11
Journal Issue Volume 11, Supplement 3 / August, 1998 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Large-scale PACS implementationEmail this article to a colleague.
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Abstract The transition to filmless radiology is a much more formidable task than making the request for proposal to purchase a (Picture
Archiving and Communications System) PACS. The Department of Defense and the Veterans Administration have been pioneers in
the transformation of medical diagnostic imaging to the electronic environment. Many civilian sites are expected to implement
large-scale PACS in the next five to ten years. This presentation will relate the empirical insights gleaned at our institution
from a large-scale PACS implementation. Our PACS integration was introduced into a fully operational ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Direct digital versus conventional film screen radiography of the musculoskeletal systemEmail this article to a colleague.
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Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168295Authors
David W. Piraino, Cleveland Clinic Foundation Department of Radiology A-21 9500 Euclid Avenue 44195 Cleveland OHWilliam J. Davros, Cleveland Clinic Foundation Department of Radiology A-21 9500 Euclid Avenue 44195 Cleveland OHMichael Lieber, Cleveland Clinic Foundation Department of Radiology A-21 9500 Euclid Avenue 44195 Cleveland OHBradford J. Richmond, Cleveland Clinic Foundation Department of Radiology A-21 9500 Euclid Avenue 44195 Cleveland OHJean P. Schils, Cleveland Clinic Foundation Department of Radiology A-21 9500 Euclid Avenue 44195 Cl...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Introduction to SCAR 98: The 15th Symposium for Computer Applications in Radiology: Filmless Radiology—Reengineering the Practice of Radiology for the 21st CenturyEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168244Authors
Alan H. Rowberg, University of Washington SCAR 98 Scientific Committee SeattlePhilip A. Templeton, University of Maryland School of Medicine SCAR 98 BaltimoreRobert M. Allman, University of Maryland School of Medicine SCAR 98 Baltimore
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 11
Journal Issue Volume 11, Supplement 3 / August, 1998 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Clinical trial of panoramic dental radiography using a CCD receptorEmail this article to a colleague.
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The objective of this study was to evaluate the perceived clinical efficacy of a charge-coupled device (CCD) detector for
panoramic radiography by comparing the images produced to conventional film/screen radiographs using the same machine and
patient population. For clinical evaluation, 18 criteria were selected. These included overall assessment of the area of coverage,
clarity of dental structures, clarity of bony outlines, specific anatomic details such as the maxillary sinus floor, mandibular
canal and mandibular condyle, and region-by-region assessment of the dentition. Observers acted independently using identic...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Panoramic dental radiography using a charge-coupled device receptorEmail this article to a colleague.
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This study compared the spatial resolution, area distortion factors, and the dosage considerations
for a panoramic system where standard film/screen and a charge-coupled device were alternatively employed as the image receptor.
Resolution and image contours were determined using a lead resolution grid positioned at selected beam projection angulations.
Exposure measurements were carried out using a RANDO® average man phantom and a 3 cc beryllium-windowed ionization chamber. The maximum spatial resolution with film approached
5 lp mm−1 whereas with the CCD the maximum resolution was just above 4 lp mm−1. Consequent...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Advanced digital mammographyEmail this article to a colleague.
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Abstract Mammography is the most effective method for early detection of breast cancer and yet, 10% to 30% of women who have breast
cancer and undergo mammography have negative mammograms. Furthermore, of the women who are sent to biopsy, only 20% to 40%
actually have breast cancer. Quantitative analysis of the radiographic features of microcalcifications and masses may help
radiologists improve their specificity.
Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168292Authors
Ronald B. Schilling, PGI Corporation 13650 Paseo del Roble 94022 Los Altos Hills CAJohn D. Cox, PGI Corporation 13650 ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
PACS and CR implementation in a Level I Trauma Center Emergency DepartmentEmail this article to a colleague.
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Abstract Implementation of a picture archive and communication system (PACS) at a large teaching hospital is an expensive and daunting
endeavor. The approach taken at the University of Alabama Hospitals has been to assemble an institution-wide system through
focused integration of smaller mini-PACS. Recently a mini-PACS using Computed Radiography (CR) has been placed in the Emergency
Department (ED) of a Level I Trauma Center completely replacing conventional screen-film radiography. This area of the hospital
produces approximately 250 images per day and provides many challenging requirements: the need for r...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Challenges for pediatric radiology using Computed RadiographyEmail this article to a colleague.
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Conclusions Many of the challenges that we encountered may be overcome through experience, proper configuration of system, and further
software enhancements. The overwhelming benefits of improved image access and immediate consultations create a demand for
CR, even with sub-optimal images. The challenge for radiology departments is to execute a deliberate implementation of CR,
ensuring that we produce the best quality images without greater radiation dose to the patient.
Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168290Authors
Charles E. Willis, Baylor College of Medicine Department of ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Evaluation of commercial PC-based DICOM image viewerEmail this article to a colleague.
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Conclusion While each software product incorporated some excellent features, none included the full repertoire of needed functions. Depending
on the specific clinical practice setting, absence of a function could constitute an inconvenience or preclude use of the
software. For a referring physician inside the hospital, another software application affords access to the radiologist report,
but remote access may not be available. When the primary practice involves plain radiography, the lack of sophisticated tools
for managing complex cross-sectional images is a minor inconvenience, but for a neuroradiologist ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Impact of filmless imaging on the frequency of clinician review of radiology imagesEmail this article to a colleague.
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Abstract The purpose of this study was to determine the impact of filmless imaging on the frequency with which physicians access radiology
images and to assess clinician perception of image accessibility using a hospital-wide Picture Archival and Communication
System (PACS). Quantitative data were collected at the Baltimore VA Medical Center (BVAMC), prior to and after conversion
to filmless imaging, to determine the frequency with which clinicians access radiology images. Survey data were also collected
to assess physician preferences of image accessibility, time management, and overall patient care when co...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Comparison of three display methods for evaluating CT angiography data for the vascular assessment of renal donorsEmail this article to a colleague.
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Conclusion In conclusion, CTA display methods are useful when evaluating renal vascular anatomy. Cinematic loop appears to be the most
useful display method and is significantly more sensitive, specific, and accurate than the 3D-MIP or stack axial when identifying
renal arterial anatomy.
Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168287Authors
Maria E. Pace, University of Maryland Medical Center Department of Diagnostic Radiology 22 S. Greene Street 21201 Baltimore MDThorsten L. Krebs, University of Maryland Medical Center Department of Diagnostic Radiology 22 S. Greene Street 21201 Balt...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Strategies for the promotion of Computer Applications in Radiology in healthcare deliveryEmail this article to a colleague.
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The objective of this paper is to identify current trends in the development and implementation of computer applications in
today’s ever-changing healthcare environment. Marketing strategies are discussed with the goal of promoting computer applications
in radiology as a means to advance future healthcare acceptance of technologic developments from the medical imaging field.
With the rapid evolution of imaging and information technologies along with the transition to filmless imaging, radiologists
must assume a proactive role in the development and application of these advancements. This expansion can be accomplished...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Clinician usage patterns of a desktop radiology information display applicationEmail this article to a colleague.
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In this report we describe some of the differences and similarities in usage patterns for the two physician
groups. A very high percentage of physicians indicated that having image display capabilities on the workstations was very
valuable.
Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168285Authors
Bradley J. Erickson, Mayo Foundation Department of Radiology 55905 Rochester MNWilliam J. Ryan, Mayo Foundation Department of Radiology 55905 Rochester MNDale G. Gehring, Mayo Foundation Department of Radiology 55905 Rochester MNCalvin Beebe, Mayo Foundation Department of Radiology 55905 Rochester MN
...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Providing complete multimedia patient data to consulting radiologists, other specialists, and the referring clinicianEmail this article to a colleague.
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Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168284Authors
Ruth E. Dayhoff, Washington CIO Field Office Technical Services, Department of Veterans Affairs 8403 Colesville Road, Suite 200 20910 Silver Spring MDPeter M. Kuzmak, Washington CIO Field Office Technical Services, Department of Veterans Affairs 8403 Colesville Road, Suite 200 20910 Silver Spring MD
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 11
Journal Issue Volume 11, Supplement 3 / August, 1998 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Automated routing of DICOM CT, MR, and CR images: Solving the pitfalls of vendor-specific DICOM implementationsEmail this article to a colleague.
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Abstract This paper details our experience in developing and implementing an automated DICOM Image Router. This workstation serves
as a gateway between image acquisition devices and image display and storage devices. Images are checked for demographic input
errors and data format inconsistencies between the source and destination devices. Based on the configured rules, an image
may be held for manual correction and/or distributed to multiple locations. Distribution is based upon easily configured environmental
variables and rules files which may be changed as needed. For example, CT images are typically sent...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Recommendations for image prefetch or film digitization strategy based on an analysis of an historic radiology image databaseEmail this article to a colleague.
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Content Type Journal ArticleCategory SessionsDOI 10.1007/BF03168282Authors
Eliot Siegel, University of Maryland School of Medicine, Baltimore VA Medical Center Imaging Service 22 Greene St, Balto VA 21201 Baltimore MDBruce Reiner, University of Maryland School of Medicine, Baltimore VA Medical Center Imaging Service 22 Greene St, Balto VA 21201 Baltimore MD
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 11
Journal Issue Volume 11, Supplement 3 / August, 1998 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Picture Archiving and Communication Systems planning: A methodologyEmail this article to a colleague.
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This article presents the Picture Archiving and Communication Systems (PACS) planning methodology used by the Department of
Defense’s (DOD) Joint Imaging Technology Project Office (JITPO). This methodology evaluates four areas of PACS planning and
implementation: strategic planning, clinical scenario planning, installation planning, and implementation planning. The first
task is to develop a PACS team, from the local facility, that will execute the program. A written PACS plan is developed by
the JITPO, with active input and final say from the site’s PACS team. This plan includes the PACS goals and objectives, clin...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
A literature review on communication between picture archiving and communication systems and radiology information systems and/or hospital information systemsEmail this article to a colleague.
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Abstract The purpose of this literature review is to present the concepts surrounding the issue of communication between imaging systems
and information systems in radiology and the literature about them. Picture archiving and communication systems (PACS) were
developed to combine viewing of modality images, archiving, and distribution of images. When PACS is integrated/interfaced
with radiology information systems (RIS) or hospital information systems (HIS), it can merge patient demographics, medical
records, and images. To address several issues surrounding communication between PACS and HIS/RIS and to mak...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
A client server model to facilitate creation of a medical image teaching libraryEmail this article to a colleague.
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Abstract A simple and convenient system for indexing and archiving medical images used in teaching was developed. The approach was
to combine a smart client-side graphical user interface that controlled image size, file format, and keyword structure, and
communicated with the hospital information system via hypertext markup language, to populate the interface with user selectable
pull-down menus. The result is a system that is easily extensible beyond the radiology images for which it was originally
designed. Only minor modifications of the client interface are required to adapt the program to accept any fil...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Characterization of color CRT display systems for monochrome applicationsEmail this article to a colleague.
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Abstract Soft-copy presentation of medical images is becoming more and more important as medical imaging is strongly moving toward
digital technology, and health care facilities are converting to filmless hospital and radiological information management.
Although most medical images are monochrome, frequently they are displayed on color CRTs, particularly if general-purpose
workstations or PCs are used for medical viewing. In the present report, general measurement and modeling procedures for the
characterization of color CRT monitors for monochrome presentation are introduced. The contributions from the thr...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
The Society for Computer Applications in RadiologyEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168634Authors
Jeremy W. R. Young, Medical University of South Carolina Department of Radiology 171 Ashley Avenue 29425 Charleston SO
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 12
Journal Issue Volume 12, Number 3 / August, 1999 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
A new filtering algorithm for medical magnetic resonance and computer tomography imagesEmail this article to a colleague.
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Abstract Inner views of tubular structures based on computer tomography (CT) and magnetic resonance (MR) data sets may be created by
virtual endoscopy. After a preliminary segmentation procedure for selecting the organ to be represented, the virtual endoscopy
is a new postprocessing technique using surface or volume rendering of the data sets. In the case of surface rendering, the
segmentation is based on a grey level thresholding technique. To avoid artifacts owing to the noise created in the imaging
process, and to restore spurious resolution degradations, a robust Wiener filter was applied. This filter wo...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Aspects of computer security: A primerEmail this article to a colleague.
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This article describes for the lay person the fundamental points of
computer operation, how these can be points attacked, and how these attacks can be foiled—or at least detected. In addition,
a taxonomy that should aid system administrators to evaluate and strengthen their systems is described.
Content Type Journal ArticleDOI 10.1007/BF03168630Authors
Steve Langer, University of Washington Medical Center Department of Radiology 1959 NE Pacific St Box 357115 98195 Seattle WABrent Stewart, University of Washington Medical Center Department of Radiology 1959 NE Pacific St Box 357115 98195 Seattle WA
Journal J...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Guest editorial: Image quality assurance for CRT display systems-part IIIEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168628Authors
Hans Roehrig, The University of Arizona Department of Radiology and Optical Sciences Center Tucson AZ
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 12
Journal Issue Volume 12, Number 3 / August, 1999 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Why and how is soft copy reading possible in clinical practice?Email this article to a colleague.
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Abstract The properties of the human visual system (HVS) relevant to the diagnostic process are described after a brief introduction
on the general problems and advantages of using soft copy for primary radiology interpretations. At various spatial and temporal
frequencies the contrast sensitivity defines the spatial resolution of the eye-brain system and the sensitivity to flicker.
The adaptation to the displayed radiological scene and the ambient illumination determine the dynamic range for the operation
of the HVS. Although image display devices are determined mainly by state-of-the-art technology, analys...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
The effect of the antiscatter grid on full-field digital mammography phantom imagesEmail this article to a colleague.
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This article reports on a recent application of this method to a prototype full-field digital mammography (FFDM) machine.
Images of a modified ACR phantom were acquired on the General Electric Diagnostic Molybdenum Rhodium (GE-DMR) FFDM machine
at a number of x-ray techniques, both with and without the scatter reduction grid. The techniques were chosen so that one
had sets of grid and non-grid images with matched doses (200 mrads) and matched gray-scale values (1500). A third set was
acquired at constant 26 kVp and varying mAs for both grid conditions. Analyses of the images yielded signal-to-noise-ratio
(SNR), contra...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Guest editorial: Image quality assurance for CRT display systemsEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168620Authors
Hans Roehrig, The University of Arizona Department of Radiology and Optical Sciences Center Tucson AZ
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 12
Journal Issue Volume 12, Number 1 / February, 1999 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Image processing strategies in picture archiving and communication systemsEmail this article to a colleague.
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Abstract An image processing strategy is presented that assures very similar soft-copy presentation on diagnostic workstations of a
picture archiving and communication system (PACS) over the lifetime of an image file and simultaneously provides efficient
work-flow. The strategy is based on rigid partitioning of image processing into application- and display-device-specific processing.
Application-specific processing is optimized for a reference display system. A description of this system is attached to the
file header of the application-specifically processed image which is stored in the PACS. Every diagnos...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Computerized analysis of abnormal asymmetry in digital chest radiographs: Evaluation of potential utilityEmail this article to a colleague.
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Abstract The purpose of this study was to develop and test a computerized method for the fully automated analysis of abnormal asymmetry
in digital posteroanterior (PA) chest radiographs. An automated lung segmentation method was used to identify the aerated
lung regions in 600 chest radiographs. Minimal apriori lung morphology information was required for this gray-level thresholding-based segmentation. Consequently, segmentation
was applicable to grossly abnormal cases. The relative areas of segmented right and left lung regions in each image were compared
with the corresponding area distributions of normal...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
The Society for Computer Applications in RadiologyEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168627Authors
Byrn Williamson, Mayo Clinic Department of Diagnostic Radiology 55905 Rochester MN
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 12
Journal Issue Volume 12, Number 1 / February, 1999 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Quality-of-service improvements from coupling a digital chest unit with integrated speech recognition, information, and Picture Archiving and Communications SystemsEmail this article to a colleague.
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Abstract Speech recognition reporting for chest examinations was introduced and tightly integrated with a Radiology Information System
(RIS) and a Picture Archiving and Communications System (PACS). A feature of this integration was the unique one-to-one coupling
of the workstation displayed case and the reporting via speech recognition for thatand only that particular examination and patient. The utility of the resulting, wholly integrated electronic environment was then compared
with that of the previous analog chest unit and dedicated wet processor, with reporting of hard copy examinations by direct
dicta...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Computed radiography dual energy subtraction: Performance evaluation when detecting low-contrast lung nodules in an anthropomorphic phantomEmail this article to a colleague.
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This study compares the diagnostic
accuracy of conventional computed radiography to that of ES obtained with two radiographic techniques. One soft tissue only
image was obtained at the conventional CR technique (s=254) and the second was obtained at twice the radiation exposure (s=131)
to reduce noise. An anthropomorphic phantom with superimposed low-contrast lung nodules was imaged 53 times for each radiographic
technique. Fifteen images had no nodules; 38 images had a total of 90 nodules placed on the phantom. Three chest radiologists
read the three sets of images in a receiver operating characteristic (ROC) study. ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
A fast way to visualize the brain surface with volume rendering of MRI dataEmail this article to a colleague.
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Abstract The preprocessing of 3-dimensional (3D) MRI data constitutes a bottleneck in the process of visualizing the brain surface
with volume rendering. As a fast way to achieve this preprocessing, the authors propose a simple pipeline based on an algorithm
of seedgrowing type, for approximate segmentation of the intradural space in T1-weighted 3D MRI data. Except for the setting
of a seed and four parameters, this pipeline proceeds in an unsupervised manner; no interactive intermediate step is involved.
It was tested with 15 datasets from normal adults. The result was reproducible in that as long as the se...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
The Society for Computer Applications in RadiologyEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03168856Authors
Jeremy W. R. Young, Medical University of South Carolina Department of Radiology 171 Ashley Avenue 29425 Charleston SC
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 12
Journal Issue Volume 12, Number 4 / November, 1999 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Interslice coding for medical three-dimensional images using an adaptive mode selection technique in wavelet transform domainEmail this article to a colleague.
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Abstract In this article the authors propose a novel interslice coding algorithm especially appropriate for medical 3-dimensional (3D)
images. The proposed algorithm is based on a video coding algorithm using motion estimation/compensation and transform coding.
In the algorithm, warping is adopted for motion compensation. Then, by using adaptive mode selection, an MC residual image
and original image are mixed up in the wavelet transform domain for improvement in coding performance. The mixed image is
then compressed by the zerotree coding method. It is proven that the adaptive mode selection technique in th...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Characterization of monochrome CRT display systems in the fieldEmail this article to a colleague.
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This article presents a review of image quality assessment methods for monochrome CRTs in the field as opposed to the laboratory.
The review includes image quality programs at the University of Washington, the University of Texas at Houston, the University
of Michigan, and the University of Arizona. CRT manufacturers and display-board suppliers also are concerned with image quality,
particularly with respect to the life time of the CRT. The programs show that the need for image quality assessment for CRTs
in the clinic is recognized. Although several experimental programs are in place, there is no universally accepted ...
Source: Journal of Digital Imaging - October 28, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Calendar/meeting news 1992–1993Email this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03167838
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 5
Journal Issue Volume 5, Number 2 / May, 1992 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 26, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
Automated solid models from serial section imagesEmail this article to a colleague.
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Abstract A new method for creating unambiguous and complete boundary representation solid models with a hybrid polygonal/nonuniform
rational B spline representation was developed and tested using computed tomography scans of the wrist. Polygon surface approximation
was applied to a sequence of parallel planar outlines of individual bone elements in the wrist. An automated technique for
the transformation of edge contours into solid models was implemented. This was performed using a custom batch file command
sequence generator coupled to a commercially available mechanical computer-aided design and engineerin...
Source: Journal of Digital Imaging - October 26, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
The Society for Computer Applications in RadiologyEmail this article to a colleague.
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Content Type Journal ArticleDOI 10.1007/BF03167839Authors
Alan H. Rowberg, University of Washington Department of Radiology 98195 Seattle WA
Journal Journal of Digital ImagingOnline ISSN 1618-727XPrint ISSN 0897-1889
Journal Volume Volume 5
Journal Issue Volume 5, Number 2 / May, 1992 (Source: Journal of Digital Imaging)
Source: Journal of Digital Imaging - October 26, 2009 Category: Radiology Tags: Journal of Digital Imaging Source Type: journals
