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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 19.

Magnetic resonance imaging of time‐varying magnetic fields from therapeutic devices
This article presents the theory behind the method and provides proof of concept by imaging time‐varying magnetic fields generated by a figure‐eight coil inside simple phantoms over a range of frequencies and intensities using a 7T small animal MRI scanner. The method was able to reconstruct the three‐dimensional components of the oscillating magnetic field vector. Copyright © 2013 John Wiley & Sons, Ltd. A method for imaging time‐varying magnetic fields such as those generated by transcranial magnetic stimulators and radiofrequency hyperthermia probes was introduced in this study. The method was able to recon...
Source: NMR in Biomedicine - January 28, 2013 Category: Radiology Authors: Luis Hernandez‐Garcia, Vivek Bhatia, Krishan Prem‐Kumar, Magnus Ulfarsson Tags: Rapid communication Source Type: research

Longitudinal evaluation of hepatic lipid deposition and composition in ob/ob and ob/+ control mice
The objective of this study was to quantitatively assess lipid deposition (fractional lipid mass, fLM) and composition (fraction of polyunsaturated lipids, fPUL and mean chain length, MCL) in livers of ob/ob mice, a genetic model of obesity and mild diabetes, and ob/+ heterozygous control animals in a noninvasive manner using 1H‐MRS at 9.4T. For accurate quantification, intensity values were corrected for differences in T2 values while T1 effects were considered minimal due to the long TR values used. Values of fLM, fPUL and MCL were derived from T2‐corrected signal intensities of lipids and water resonance. Hepatic li...
Source: NMR in Biomedicine - January 28, 2013 Category: Radiology Authors: Qiong Ye, Carsten Friedrich Danzer, Alexander Fuchs, Divya Vats, Christian Wolfrum, Markus Rudin Tags: Research article Source Type: research

Improved Bloch‐Siegert based B1 mapping by reducing off‐resonance shift
This article is a U.S. Government work and is in the public domain in the USA. The B1+ mapping method on the Bloch‐Siegert (BS) shift is currently limited by tissue heating associated with the BS irradiation pulse. We investigated the possibility of lowering the off‐resonance frequency of this pulse, as the sensitivity of BS‐based B1+ mapping can be substantially improve when irradiating closer to resonance. Using optimized irradiation pulse shape and gradient crusher to minimize direct excitation effects, in vivo experiments on human brain at 7T confirmed the improved sensitivity.
Source: NMR in Biomedicine - January 28, 2013 Category: Radiology Authors: Qi Duan, Peter Gelderen, Jeff Duyn Tags: Research article Source Type: research

Water signal attenuation by D2O infusion as a novel contrast mechanism for 1H perfusion MRI
In this study, we propose a contrast‐enhanced strategy to indirectly trace administered D2O by monitoring the signal attenuation of 1H MRI. Experiments on D2O concentration phantoms and in vivo rat brains were conducted to prove the concept of the proposed contrast mechanism. An average maximum signal drop ratio of 5.25 ± 0.91% was detected on 1H MR images of rat brains with 2 mL of D2O administered per 100 g of body weight. As a diffusible tracer for perfusion, D2O infusion is a practicable method for the assessment of tissue perfusion and has the potential to provide different information from gadolinium‐based c...
Source: NMR in Biomedicine - January 28, 2013 Category: Radiology Authors: Fu‐Nien Wang, Shin‐Lei Peng, Chin‐Tien Lu, Hsu‐Hsia Peng, Tzu‐Chen Yeh Tags: Research article Source Type: research

Diagnostic imaging in a patient with an acute knee injury.
Abstract The patient was a 23-year-old man, currently serving in a military airborne operations unit. During a jump training exercise, the patient's right lower extremity became entangled in his parachute equipment upon exiting the aircraft, which caused hyperextension and valgus forces upon his right knee. Due to concern for a fracture, the patient was transported to an emergency department, where conventional radiographs were completed and interpreted by a radiologist as negative for a fracture. Following further physical examination by a physical therapist, magnetic resonance imaging of the right knee was ordere...
Source: Physical Therapy - January 27, 2013 Category: Physiotherapy Authors: Sago CE, Labuda CS Tags: J Orthop Sports Phys Ther Source Type: research

Doctors Expect Full Recovery For Toddler Who Lodged Pencil In Brain
BOSTON (CBS) – Three weeks after getting a pencil lodged deep into her brain, a 21-month old girl from New Hampshire is home, and on her way to what’s expected to be a full recovery. Earlier this month, Olivia Smith was holding a colored pencil when she fell off a reclining chair in her New Boston home. As x-rays show, the pencil went through her eye cavity and into her brain. Amazingly, doctors say the pencil missed all major vital areas of her brain. A millimeter off in any direction, and Smith likely would have suffered major brain damage or even death. “If you asked me to sit down with a patient’s scan an...
Source: WBZ-TV - Breaking News, Weather and Sports for Boston, Worcester and New Hampshire - January 27, 2013 Category: Consumer Health News Authors: stevesaleeba Tags: Health Local News Syndicated Local Boston Children's Hospital Dr. Darren Orbach olivia smith pencil in brain Source Type: news

[German trauma centers : Level-dependent differences in polytrauma care regarding resources and diagnostic concepts.]
CONCLUSIONS: Standardized structures regarding radiological diagnostics of polytraumatized patients do not exist at either the same level of the three-tiered hospital system or between levels of care of German hospitals.. PMID: 23354561 [PubMed - as supplied by publisher]
Source: Der Chirurg - January 27, 2013 Category: Surgery Authors: Bayer J, Pache G, Hammer TO, Zwingmann J, Südkamp NP, Strohm PC Tags: Chirurg Source Type: research

[Fetal magnetic resonance imaging of thoracic and abdominal malformations.]
Abstract CLINICAL/METHODICAL ISSUE: Diagnosis and differential diagnosis of fetal thoracic and abdominal malformations. STANDARD RADIOLOGICAL METHODS: Ultrasound and magnetic resonance imaging (MRI). METHODICAL INNOVATIONS: In cases of suspected pathologies based on fetal ultrasound MRI can be used for more detailed examinations and can be of assistance in the differential diagnostic process. PERFORMANCE: Improved imaging of anatomical structures and of the composition of different tissues by the use of different MRI sequences. ACHIEVEM...
Source: Der Radiologe - January 27, 2013 Category: Radiology Authors: Woitek R, Brugger PC, Asenbaum U, Furtner J, Prayer D Tags: Radiologe Source Type: research

Validation of three deformable image registration algorithms for the thorax.
Abstract Deformable image registration (DIR) has been proposed for lung ventilation calculation using 4D CT. Spatial accuracy of DIR can be evaluated using expert landmark correspondences. Additionally, image differences between the deformed and the target images give a degree of accuracy of DIR algorithms for the same image modality registration. DIR of the normal end-expiration (50%), end-inspiration (0%), midexpiration (30%), and midinspiration image (70%) phases of the 4D CT images was used to correlate the voxels between the respiratory phases. Three DIR algorithms, optical flow (OF), diffeomorphic morphons (D...
Source: Journal of Applied Clinical Medical Physics - January 26, 2013 Category: Physics Authors: Latifi K, Zhang G, Stawicki M, Van Elmpt W, Dekker A, Forster K Tags: J Appl Clin Med Phys Source Type: research

With Or Without Knowledge Of Price, Hospital Imaging Test Ordering By Doctors Remain The Same
In a study designed to see if doctors who are told the exact price of expensive medical tests like MRIs in advance would order fewer of them, Johns Hopkins researchers got their answer: No. In a report published online in the Journal of the American College of Radiology, the researchers found that revealing the costs of MRIs and other imaging tests up front had no impact on the number of tests doctors ordered for their hospitalized patients...
Source: Health News from Medical News Today - January 26, 2013 Category: Consumer Health News Tags: MRI / PET / Ultrasound Source Type: news

Early knee changes in dancers identified by ultra‐high‐field 7 T MRI
This study had Institutional Review Board approval. We recruited eight pre‐professional female dancers and nine non‐athletic, female controls. We scanned the dominant knee on a 7 T MRI scanner using a three‐dimensional fast low‐angle shot sequence and a proton density, fast spin‐echo sequence to evaluate cartilage and menisci, respectively. Two radiologists scored cartilage (International Cartilage Repair Society classification) and meniscal (Stoller classification) lesions. We applied two‐tailed z‐ and t‐tests to determine statistical significance. There were no cartilage lesions in dancers or controls. ...
Source: Scandinavian Journal of Medicine and Science in Sports - January 26, 2013 Category: Sports Medicine Authors: G. Chang, M. Diamond, G. Nevsky, R. R. Regatte, D. S. Weiss Tags: Original Article Source Type: research

Automatic slice alignment method for cardiac magnetic resonance imaging.
CONCLUSION: The experimental results showed that our proposed method can detect the cardiac planes quickly and accurately. Our method is therefore beneficial to both patients and operators. PMID: 23354512 [PubMed - as supplied by publisher]
Source: Magma - January 26, 2013 Category: Radiology Authors: Nitta S, Takeguchi T, Matsumoto N, Kuhara S, Yokoyama K, Ishimura R, Nitatori T Tags: MAGMA Source Type: research

T (2) relaxometry measurements in low spatial frequency brain regions differ between fast spin-echo and multiple-echo spin-echo sequences.
CONCLUSION: Our findings indicate that T (2) values derived from FSE sequences are prone to large errors, even in low spatial frequency regions such as the CST, when compared to MESE sequences. Future studies should be aware of this limitation of FSE sequences. PMID: 23354513 [PubMed - as supplied by publisher]
Source: Magma - January 26, 2013 Category: Radiology Authors: Rajagopalan V, Lowe MJ, Beall EB, Yue GH, Pioro EP Tags: MAGMA Source Type: research

Echocardiographic integrated backscatter for detecting progression and regression of aortic valve calcifications in rats
Conclusions: cIB is a non-invasive tool allowing quantitative monitoring of CAVD progression and regression in a rat model of reversible renal failure, as validated by comparison with histology. This technique might become useful for assessing CAVD during targeted therapy.
Source: Cardiovascular Ultrasound - January 26, 2013 Category: Radiology Authors: Bram RoosensGezim BalaKris GillisIsabel RemorySteven DroogmansJoan SomjaEléonore DelvenneJoeri NayerJohan SchiettecattePhilippe DelvennePatrizio LancellottiGuy CampBernard Cosyns Source Type: research

Imaging: Physicians Ignore the Financial Bottom Line Imaging: Physicians Ignore the Financial Bottom Line
Physicians continue to order expensive MRIs even when presented with their high cost at the time of ordering the test. Medscape Medical News
Source: Medscape Today Headlines - January 25, 2013 Category: Consumer Health News Tags: Radiology News Source Type: news

Effects of exposure to a 50 Hz sinusoidal magnetic field during the early adolescent period on spatial memory in mice
In this study, early adolescent male mice were exposed from postnatal day (P) 23–35 to a 50 Hz MF at 2 mT for 60 min/day. On P36–45, the potential effects of the MF exposure on spatial memory performance were examined using the Y‐maze and Morris water maze tasks. The results showed that the MF exposure did not affect Y‐maze performance but improved spatial learning acquisition and memory retention in the water maze task under the present experimental conditions. Bioelectromagnetics. © 2013 Wiley Periodicals, Inc.
Source: Bioelectromagnetics - January 25, 2013 Category: Radiology Authors: Xiusong Wang, Ke Zhao, Dong Wang, Wendy Adams, Yu Fu, Huaying Sun, Xiaofen Liu, Hualin Yu, Yuanye Ma Tags: Research Article Source Type: research

Qigong has benefits for breast cancer patients
Qigong, an ancient Chinese mind-body practice, reduces symptoms of depression (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Impact Of A Multidisciplinary Team Training Programme On Rectal Cancer Outcomes In Spain
ConclusionThis study shows that the results obtained in Norway have been reproduced in a larger population in Spain applying a similar methodology.© 2013 The Authors. Colorectal Disease © 2013 The Association of Coloproctology of Great Britain and Ireland
Source: Colorectal Disease - January 25, 2013 Category: Gastroenterology Authors: Hector Ortiz, Arne Wibe, Miguel Angel Ciga, Juan Lujan, Antonio Codina, Sebastiano Biondo, Tags: Original Article Source Type: research

Contents
Source: Nuclear Medicine and Biology - January 25, 2013 Category: Radiology Source Type: research

Analysis of [11C]methyl-candesartan kinetics in the rat kidney for the assessment of angiotensin II type 1 receptor density in vivo with PET
Conclusion: It may be possible to detect changes in AT1 receptor density in the rat kidney in vivo with [11C]methyl-candesartan and PET. Imaging AT1 receptors with PET may provide valuable information on the role of these receptors in the pathogenesis of diseases such as hypertension, diabetic nephropathy, ventricular remodeling, and heart failure.
Source: Nuclear Medicine and Biology - January 25, 2013 Category: Radiology Authors: Mireille Lortie, Jean N. DaSilva, Sheryn A. Kirkpatrick, Tayebeh Hadizad, Basma A. Ismail, Rob S.B. Beanlands, Robert A. deKemp Source Type: research

Editorial Board
Source: Nuclear Medicine and Biology - January 25, 2013 Category: Radiology Source Type: research

Case of the Month #181: Iatrogenic Colon Perforation During Epicardial Pacing Wire Placement
A 79-year-old man was admitted to the hospital with Staphylococcal aureus endocarditis. Before surgery, he had a small right hemispheric cardioembolic stroke. He subsequently underwent mitral valve replacement for treatment of a large posterior leaflet valvular vegetation. Two days after surgery, he clinically deteriorated and developed intolerance to nasogastric feeds and significant abdominal distension and tenderness. He was hemodynamically stable, without fever or increasing leukocytosis. Supine frontal chest and abdominal radiographs (not shown) were ordered and demonstrated postsurgical changes related to recent mitr...
Source: Canadian Association of Radiologists Journal - January 25, 2013 Category: Radiology Authors: Justin Haba, Shamir Patel, Robin Gray Tags: Canadian Residents’ Corner / Coin canadien des résidents en radiologie Source Type: research

Case of the Month #180: Atypical Thalamic and Mesencephalic Neurocytoma—A Rare Neoplasm in Children
An 8-month-old full-term infant presented with right hand weakness and head tilt to the right, observed for the first time at the age of 5 months, with gradual progression during the next 2.5 months. Psychomotor development was within normal limits. Results of a physical examination revealed partial hemiparesis in the right upper and lower extremities associated with enhanced deep tendon reflexes and Babinski reflex on the right. No sensory deficit was identified. Findings also included right-sided facial weakness, left ptosis, and abnormal extraocular movements. Head circumference was appropriate to the age, and anterior ...
Source: Canadian Association of Radiologists Journal - January 25, 2013 Category: Radiology Authors: Anatoly Shuster, Mehran Midia Tags: Canadian Residents’ Corner / Coin canadien des résidents en radiologie Source Type: research

A Literature Review of Findings in Physical Elder Abuse
Conclusion: Two-thirds of injuries that occur in elder abuse are to the upper extremity and maxillofacial region. The social context in which the injuries takes place remains crucial to accurate identification of abuse. This includes a culture of violence in the family; a demented, debilitated, or depressed and socially isolated victim; and a perpetrator profile of mental illness, alcohol or drug abuse, or emotional and/or financial dependence on the victim.Résumé: Objectif: Analyser la littérature médicale à la recherche de descriptions du type de blessures physiques subies dans les cas de violence envers les personn...
Source: Canadian Association of Radiologists Journal - January 25, 2013 Category: Radiology Authors: Kieran Murphy, Sheila Waa, Hussein Jaffer, Agnes Sauter, Amanda Chan Tags: Health Policy and Practice / Santé : politique et pratique médicale Source Type: research

Radiologists Are Still Changing the Way Health Care Is Being Delivered
Abuse is the weapon of the vulgar.Samuel Griswold Goodrich (1793-1860), American authorSure I'm for helping the elderly. I'm going to be old myself someday.Lillian Carter (1898-1983), mother of American president Jimmy Carter
Source: Canadian Association of Radiologists Journal - January 25, 2013 Category: Radiology Authors: Peter L. Munk Tags: Editorial / Éditorial Source Type: research

Some Additions to the Annual H&P Paperwork
It’s time for another round of history and physical examination forms. Here are some more absurd forms that could be added to the absurdity.
Source: Diagnostic Imaging - January 25, 2013 Category: Radiology Source Type: news

ASCO GI: CT unnecessary for staging early gastric cancer
SAN FRANCISCO - CT is unnecessary for staging gastric cancer owing to its poor (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Hospitals, Healthcare Providers to Benefit from New Premier Agreements for Computed Radiography
CHARLOTTE, N.C.--(Healthcare Sales & Marketing Network)--The Premier healthcare alliance today announced new agreements for computed radiography have been awarded to Agfa Healthcare Corporation of Greenville, S.C.; Carestream Health Inc. of Rochester, N.Y.... Devices, Radiology, Group PurchasingPremier healthcare alliance, Konica Minolta Medical Imaging, Fujifilm, Philips
Source: HSMN NewsFeed - January 25, 2013 Category: Pharmaceuticals Source Type: news

IHE adds features to Connectathon
Integrating the Healthcare Enterprise (IHE) is touting new features and activities (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Bras aid positioning for large-breasted women during RT
Large-breasted women pose a challenge when radiation therapy (RT) for early-stage (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Could a new breast MR protocol replace screening mammo?
Using a streamlined breast MR protocol for women with dense tissue takes less (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Lantheus names Bailey new president/CEO
Diagnostic imaging agent developer Lantheus Medical Imaging has named Jeffrey (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Bionix launches radiation therapy tattoo system
Radiation therapy accessories provider Bionix Radiation Therapy has launched (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

GE launches Centricity Practice Solution 11
GE Healthcare has released Centricity Practice Solution 11, an upgraded version (more)
Source: AuntMinnie.com Headlines - January 25, 2013 Category: Radiology Source Type: news

Enhanced radioresponse with a novel recombinant human endostatin protein via tumor vasculature remodeling: Experimental and clinical evidence
Conclusion: This study demonstrated decreased hypoxia in animals and patients upon rh-Endo treatment, which also enhanced the radioresponse within the vasculature-remodeling period. The optimal clinical combination of rh-Endo and RT warrants further investigation.
Source: Radiotherapy and Oncology - January 25, 2013 Category: Radiology Authors: Mao-Bin Meng, Xiao-Dong Jiang, Lei Deng, Fei-Fei Na, Jia-Zhuo He, Jian-Xin Xue, Wen-Hao Guo, Qing-Lian Wen, Jie Lan, Xian-Ming Mo, Jin-Yi Lang, You Lu Tags: Reviews Source Type: research

Evaluation of organ-specific peripheral doses after 2-dimensional, 3-dimensional and hybrid intensity modulated radiation therapy for breast cancer based on Monte Carlo and convolution/superposition algorithms: Implications for secondary cancer risk assessment
Conclusions: In sharp contrast to popular belief, the IMRT technique investigated here does not increase the out-of-field dose compared to conventional techniques and may offer the most optimal plan. The 3DCRT technique with external wedges yields the largest out-of-field doses. For accurate out-of-field dose assessment, a commercial TPS should not be used, even for organs near the target volume (contralateral breast, lungs, heart).
Source: Radiotherapy and Oncology - January 25, 2013 Category: Radiology Authors: Andreas Joosten, Oscar Matzinger, Wendy Jeanneret-Sozzi, François Bochud, Raphaël Moeckli Tags: Reviews Source Type: research

Evaluation of a Multimodality MR/US Coregistration System for Investigation of Hepatic Metastases from Colorectal Cancer
Abstract: Purpose: To evaluate a magnetic resonance (MR)/ultrasound (US) coregistration system with US used in follow-up diagnostic studies of lesions originally identified by MR imaging.Materials and Methods: A single-center prospective study enrolled 21 consecutive patients (age, 64.0 y±7.5; eight men [age, 63.0 y±7.1] and 13 women [age, 65.0 y±7.3]) evaluated for potential surgical resection of liver metastases. Each patient underwent same-day MR examination and two US examinations: one regular and one with the MR/US coregistration system. Target lesions were identified on MR imaging, and US was used in follow-up dia...
Source: Journal of Vascular and Interventional Radiology : JVIR - January 25, 2013 Category: Radiology Authors: Laurent Milot, Kayan Ma, Erin Efford, Gal Sela, Nathalie Coburn, Masoom Haider, Cameron Piron, Don Plewes, Calvin Law Source Type: research

Radiofrequency Ablation for Liver Metastasis from Gastrointestinal Stromal Tumor
Conclusions: RF ablation is a feasible, safe, and useful therapeutic option for the treatment for GIST liver metastases.
Source: Journal of Vascular and Interventional Radiology : JVIR - January 25, 2013 Category: Radiology Authors: Takashi Yamanaka, Haruyuki Takaki, Atsuhiro Nakatsuka, Junji Uraki, Masashi Fujimori, Takaaki Hasegawa, Hajime Sakuma, Koichiro Yamakado Source Type: research

Three-dimensional turbo spin-echo magnetic resonance imaging (MRI) and semiquantitative assessment of knee osteoarthritis: comparison with two-dimensional routine MRI
Conclusions: Semiquantitative assessment of knee OA can be reliably performed using 3D TSE MRI, showing substantial to almost perfect agreement and high accuracy when compared to routine 2D TSE MRI. 3D TSE MRI also takes less time, which is important for large OA studies.
Source: Osteoarthritis and Cartilage - January 25, 2013 Category: Rheumatology Authors: M.D. Crema, M.H. Nogueira-Barbosa, F.W. Roemer, M.D. Marra, J. Niu, F.A. Chagas-Neto, E. Gregio-Junior, A. Guermazi Tags: Original Articles Source Type: research

Oral Sodium Thiosulfate as Maintenance Therapy for Calcific Uremic Arteriolopathy: A Case Series.
Conclusion: Oral STS, after IV STS, seems to stabilize, or even improve CUA lesions, and therefore could be useful as maintenance therapy, especially since its cost is much more reasonable than IV STS and due to the ongoing shortage of the IV formulation. PMID: 23363879 [PubMed - as supplied by publisher]
Source: American Journal of Nephrology - January 25, 2013 Category: Urology & Nephrology Authors: Albugami MM, Wilson JA, Clarke JR, Soroka SD Tags: Am J Nephrol Source Type: research

Abnormal ductus venosus pulsatility index in the absence of concurrent umbilical venous pulsations does not indicate worsening fetal condition.
CONCLUSIONS: Abnormal fetal venous blood velocity is related to adverse outcome of high-risk pregnancies. However, abnormal DV PIV is not an indicator of fetal compromise unless UV-pulsations are concurrently present and should be regarded as an artifact and not an indication for emergency delivery. PMID: 23355102 [PubMed - as supplied by publisher]
Source: The Ultrasound Review of Obstetrics and Gynecology - January 25, 2013 Category: Radiology Authors: Dahlbäck C, Pihlsgård M, Gudmundsson S Tags: Ultrasound Obstet Gynecol Source Type: research

Weight Discordance And Perinatal Mortality In Twins: The Stork Multiple Pregnancy Cohort.
CONCLUSIONS: An EFW discordance of ≥25% represents the optimal cut-off for the prediction of stillbirth and neonatal mortality irrespective of chorionicity or individual fetal size. A policy of increased fetal surveillance commencing from 26 weeks' gestation and elective delivery by 38 weeks might be reasonable, but require confirmation in large scale prospective trials. PMID: 23355123 [PubMed - as supplied by publisher]
Source: The Ultrasound Review of Obstetrics and Gynecology - January 25, 2013 Category: Radiology Authors: D'Antonio F, Khalil A, Dias T, Thilaganathan B, on behalf of the Southwest Thames Obstetric Research Collaborative (STORK) Tags: Ultrasound Obstet Gynecol Source Type: research

"Flash study" on chorionicity determination from ultrasound images at 11-14 weeks' in twin pregnancies.
Abstract Numerous studies have been performed on the accuracy of chorionicity determination, showing high accuracy of the first and the early first trimester scan (7,8,9,10). However, the majority of these studies have been conducted in large tertiary centres, whilst the current practice is that most women with twin pregnancy are first scanned by obstetricians and midwifes-sonographers in the first level ultrasound units and later referred to a specialised centre for follow-up, notably in case of monochorionicity. PMID: 23355187 [PubMed - as supplied by publisher]
Source: The Ultrasound Review of Obstetrics and Gynecology - January 25, 2013 Category: Radiology Authors: Kuleva M, Fries N, Castaing O, Moeglin D, Salomon LJ Tags: Ultrasound Obstet Gynecol Source Type: research

[Incorporation monitoring of employees of a radioiodine therapy ward - Is incorporation monitoring required for routine? Ist im Routinebetrieb eine Inkorporationsüberwachung erforderlich?]
Conclusions: To estimate the aed caused by incorporation of 131 I it has to be subdivided for the different requirements in the diverse fields of activity of the employees. Regarding those who spend most of their time nearby the patient an incorporation monitoring by the authority might be required. The 131 I incorporation factor from the guideline (10⁻⁶) can be reduced by a factor of 10. For 99m Tc and 18 F an incorporation factor of 10⁻⁷ is accepted. PMID: 23348688 [PubMed - as supplied by publisher]
Source: Nuklearmedizin - January 25, 2013 Category: Radiology Authors: Happel C, Kratzel U, Selkinski I, Bockisch B, Etzel M, Korkusuz H, Sauter B, Staudt J, von Müller F, Grünwald F, Kranert WT Tags: Nuklearmedizin Source Type: research

Influence of PET reconstruction parameters on the TrueX algorithm. A combined phantom and patient study.
Conclusion: The TrueX algorithm results in excellent diagnostic image quality, however, guidelines for native algorithms have to be extended for PSF based reconstruction methods. For appropriate tumour delineation, for the TrueX a lower threshold than the 42% recommended for the OSEM is necessary. These filter dependent thresholds have to be verified for different scanners prior to using them in multicenter trials. PMID: 23348719 [PubMed - as supplied by publisher]
Source: Nuklearmedizin - January 25, 2013 Category: Radiology Authors: Knäusl B, Rausch IF, Bergmann H, Dudczak R, Hirtl A, Georg D Tags: Nuklearmedizin Source Type: research

Postinterventional Pain and Complications of Sonographically Guided Interventions in the Liver and Pancreas.
Conclusion: Severe pain after sonographically guided interventions is rare. Most patients suffer only from mild pain postinterventionally. PMID: 23354721 [PubMed - as supplied by publisher]
Source: Ultraschall in der Medizin - January 25, 2013 Category: Radiology Authors: Lindner A, Frieser M, Heide R, Wildner D, Neurath MF, Dauth W, Bernatik T, Strobel D Tags: Ultraschall Med Source Type: research

The dose response functions of ionization chambers in photon dosimetry - Gaussian or non-Gaussian?
This study is concerned with the spatial resolution of air-filled ionization chambers in photon-beam dosimetry, i.e. with their dose response functions. These act as convolution kernels K(x,y), transforming true dose profiles D(x,y) into the measured signal profiles M(x,y). One-dimensional dose response functions have been experimentally determined for nine types of cylindrical ionization chambers both in their lateral and longitudinal directions, as well as across two plane-parallel chambers and for the single chambers of two 2D arrays. All these 1D dose response functions are closely described by Gaussian functions. The ...
Source: Zeitschrift fur Medizinische Physik - January 25, 2013 Category: Radiology Authors: Looe HK, Stelljes TS, Foschepoth S, Harder D, Willborn K, Poppe B Tags: Z Med Phys Source Type: research

Hyperpolarized 129Xe MRI of the human lung
Abstract By permitting direct visualization of the airspaces of the lung, magnetic resonance imaging (MRI) using hyperpolarized gases provides unique strategies for evaluating pulmonary structure and function. Although the vast majority of research in humans has been performed using hyperpolarized 3He, recent contraction in the supply of 3He and consequent increases in price have turned attention to the alternative agent, hyperpolarized 129Xe. Compared to 3He, 129Xe yields reduced signal due to its smaller magnetic moment. Nonetheless, taking advantage of advances in gas‐polarization technology, recent studies in humans ...
Source: Journal of Magnetic Resonance Imaging - January 25, 2013 Category: Radiology Authors: John P. Mugler, Talissa A. Altes Tags: Review: MR Physics for Clinicians Source Type: research

Functional MRI of the kidneys
This article briefly describes relevant renal anatomy and physiology, reviews the applications of functional MRI techniques for the diagnosis of renal diseases, and lists unresolved issues that will require future work. J. Magn. Reson. Imaging 2013;37:282–293. © 2012 Wiley Periodicals, Inc.
Source: Journal of Magnetic Resonance Imaging - January 25, 2013 Category: Radiology Authors: Jeff L. Zhang, Henry Rusinek, Hersh Chandarana, Vivian S. Lee Tags: Review Source Type: research

MRI of ovarian masses
Abstract MRI provides exquisite views of the pelvic anatomy through its high spatial resolution and tissue contrast, and as such plays a key role in the work up of ovarian lesions, identifying features that distinguish benign and malignant lesions. In the case of primary tumors it enables local staging and detection of metastatic disease to help guide management options such as complex surgery or the consideration of neoadjuvant chemotherapy. Functional MRI techniques such as diffusion‐weighted MRI (DW‐MRI), dynamic contrast‐enhanced MRI (DCE‐MRI) and tumor‐selective molecular imaging are currently being evaluate...
Source: Journal of Magnetic Resonance Imaging - January 25, 2013 Category: Radiology Authors: Hebert Alberto Vargas, Tristan Barrett, Evis Sala Tags: Review Source Type: research