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

Classic models for dynamic contrast‐enhanced MRI
Dynamic contrast‐enhanced MRI (DCE‐MRI) is a functional MRI method where T1 ‐weighted MR images are acquired dynamically after bolus injection of a contrast agent. The data can be interpreted in terms of physiological tissue characteristics by applying the principles of tracer‐kinetic modelling. In the brain, DCE‐MRI enables measurement of cerebral blood flow (CBF), cerebral blood volume (CBV), blood–brain barrier (BBB) permeability–surface area product (PS) and the volume of the interstitium (ve). These parameters can be combined to form others such as the volume‐transfer constant Ktrans, the extraction fr...
Source: NMR in Biomedicine - May 15, 2013 Category: Radiology Authors: Steven P. Sourbron, David L. Buckley Tags: Special issue review article Source Type: research

Invisible Metallic Microfiber in Clothing Presents Unrecognized MRI Risk for Cutaneous Burn [TECHNICAL NOTES]
We report a case of a thermal burn that occurred during MR imaging likely caused by invisible silver-embedded microfibers in the fabric of an undershirt. As the prevalence of fabric containing nondetectable metallic microfiber increases in athletic and "tech" clothing, the importance of having patients change into safe facility-provided garments before MR imaging is emphasized. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Pietryga, J. A., Fonder, M. A., Rogg, J. M., North, D. L., Bercovitch, L. G. Tags: TECHNICAL NOTES Source Type: research

Quantitative Assessment of Chronic Thalamic Stroke [TECHNICAL NOTES]
SUMMARY: The procedure presented quantitatively assesses thalamic lesions in the chronic phase of an ischemic episode. The structural MR images of 19 patients with ischemia in the thalamus were assessed by radiologic inspection. An independent rater allocated the damage to the thalamic nuclei. The assessments showed 89% accordance with the radiologic inspection (P < .001). This procedure ranks the extent of the damage to thalamic nuclei and accounts for postacute rearrangement of the neural tissue. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Pergola, G., Suchan, B., Koch, B., Schwarz, M., Daum, I., Gunturkun, O. Tags: TECHNICAL NOTES Source Type: research

Traumatic Brain Stem Injury: Evaluation by MRI [LETTERS]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Shibata, Y. Tags: LETTERS Source Type: research

Reply: [LETTERS]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Hilario, A., Ramos, A., Lagares, A. Tags: LETTERS Source Type: research

Dynamic Contrast-Enhanced MR: Importance of Reaching the Washout Phase [LETTERS]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Alcaide-Leon, P., Rovira, A. Tags: LETTERS Source Type: research

Reply: [LETTERS]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Rathore, R. K. S., Gupta, R. K. Tags: LETTERS Source Type: research

Boosting Your Brain, Part 2: The Hard Way [EDITORIALS]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Castillo, M. Tags: EDITORIALS Source Type: research

MR Imaging of Papilledema and Visual Pathways: Effects of Increased Intracranial Pressure and Pathophysiologic Mechanisms [REVIEW ARTICLES]
SUMMARY: Papilledema, defined as swelling of the optic disc, frequently occurs in the setting of increased ICP and in a variety of medical conditions, including pseudotumor cerebri, sinus thrombosis, intracerebral hemorrhage, frontal lobe neoplasms, and Chiari malformation. Noninvasive imaging of the ON is possible by using MR imaging, with a variety of findings occurring in the setting of papilledema, including flattening of the posterior sclera, protrusion of the optic disc, widening of the ONS, and tortuosity of the ON. Early recognition of papilledema and elevated ICP is of paramount importance for ensuring restoration...
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Passi, N., Degnan, A. J., Levy, L. M. Tags: REVIEW ARTICLES Source Type: research

Inherited Cerebellar Ataxia in Childhood: A Pattern-Recognition Approach Using Brain MRI [REVIEW ARTICLES]
SUMMARY: Ataxia is the principal symptom of many common neurologic diseases in childhood. Ataxias caused by dysfunction of the cerebellum occur in acute, intermittent, and progressive disorders. Most of the chronic progressive processes are secondary to degenerative and metabolic diseases. In addition, congenital malformation of the midbrain and hindbrain can also be present, with posterior fossa symptoms related to ataxia. Brain MR imaging is the most accurate imaging technique to investigate these patients, and imaging abnormalities include size, shape, and/or signal of the brain stem and/or cerebellum. Supratentorial an...
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Vedolin, L., Gonzalez, G., Souza, C. F., Lourenco, C., Barkovich, A. J. Tags: REVIEW ARTICLES Source Type: research

Resolution of Mass Effect and Compression Symptoms following Endoluminal Flow Diversion for the Treatment of Intracranial Aneurysms [EXPEDITED PUBLICATION]
CONCLUSIONS: Endovascular flow diversion is a highly effective technique for resolving radiologic mass effect and clinical compression syndromes. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Szikora, I., Marosfoi, M., Salomvary, B., Berentei, Z., Gubucz, I. Tags: EXPEDITED PUBLICATION Source Type: research

Unruptured Carotid Artery Aneurysms Presenting with Symptoms of Mass Effect: Outcome after Selective Coiling, Parent Vessel Occlusion, and Flow Diversion [EXPEDITED PUBLICATION]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: van Rooij, W. J., Sluzewski, M. Tags: EXPEDITED PUBLICATION Source Type: research

Brain Mapping Project: Clinical Aspects and Role of Neuroradiology [RESEARCH PERSPECTIVES]
SUMMARY: As experts in the realm of applying brain imaging technology for meaningful information on an individual patient's medical care, neuroradiologists can provide a physiologic, pathophysiologic, and clinical context for the advances achieved from brain-mapping. Precise identification of the abnormalities involved in brain conditions resulting from a multidisciplinary effort including neuroradiology will help to further define the nature of the pathology, evaluate the results of therapy, and improve health care. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Levy, L. M. Tags: RESEARCH PERSPECTIVES Source Type: research

Diagnostic Accuracy of PET for Recurrent Glioma Diagnosis: A Meta-Analysis [BRAIN]
CONCLUSIONS: 18F-FDG and 11C-MET PET appear to have moderately good accuracy as add-on tests for diagnosing recurrent glioma suspected by CT or MR imaging. Studies comparing alternative tracers or PET versus other imaging modalities are scarce. Prospective studies performing head-to-head comparisons between alternative imaging modalities are needed. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Nihashi, T., Dahabreh, I. J., Terasawa, T. Tags: BRAIN Source Type: research

Cognitive Impairment in Mild Traumatic Brain Injury: A Longitudinal Diffusional Kurtosis and Perfusion Imaging Study [BRAIN]
CONCLUSIONS: Combined application of DTI, DKI, and ASL to study MTBI might be useful for investigating dynamic changes in the thalamus and WM as well as cognitive impairment during a short follow-up period, though the small number of patients examined did not predict outcome. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Grossman, E. J., Jensen, J. H., Babb, J. S., Chen, Q., Tabesh, A., Fieremans, E., Xia, D., Inglese, M., Grossman, R. I. Tags: BRAIN Source Type: research

Improved Conspicuity and Delineation of High-Grade Primary and Metastatic Brain Tumors Using "Restriction Spectrum Imaging": Quantitative Comparison with High B-Value DWI and ADC [BRAIN]
CONCLUSIONS: RSI-CMs offer improved conspicuity and delineation of high-grade primary and metastatic brain tumors and reduced sensitivity to edema compared with high-b-value DWI and ADC. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: White, N. S., McDonald, C. R., Farid, N., Kuperman, J. M., Kesari, S., Dale, A. M. Tags: BRAIN Source Type: research

CT Perfusion Spot Sign Improves Sensitivity for Prediction of Outcome Compared with CTA and Postcontrast CT [BRAIN]
CONCLUSIONS: CTP spot sign detection improves the sensitivity for prediction of outcome compared with CTA or postcontrast CT–detected spots. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Koculym, A., Huynh, T. J., Jakubovic, R., Zhang, L., Aviv, R. I. Tags: BRAIN Source Type: research

Improved Delineation of Arteries in the Posterior Fossa of the Brain by Model-Based Iterative Reconstruction in Volume-Rendered 3D CT Angiography [BRAIN]
CONCLUSIONS: With 3D brain CTA, contrast-to-noise ratio and arterial delineation of the VA, SCA, AICA, and PICA in the posterior fossa are better with MBIR than FBP. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Machida, H., Takeuchi, H., Tanaka, I., Fukui, R., Shen, Y., Ueno, E., Suzuki, S., Lin, X.- Z. Tags: BRAIN Source Type: research

Postoperative Changes in Cerebral Metabolites Associated with Cognitive Improvement and Impairment after Carotid Endarterectomy: A 3T Proton MR Spectroscopy Study [BRAIN]
CONCLUSIONS: Postoperative changes in cerebral metabolites measured by using proton MR spectroscopy were associated with changes in cognitive function after CEA. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Saito, H., Ogasawara, K., Nishimoto, H., Yoshioka, Y., Murakami, T., Fujiwara, S., Sasaki, M., Kobayashi, M., Yoshida, K., Kubo, Y., Beppu, T., Ogawa, A. Tags: BRAIN Source Type: research

Molecular Imaging Changes with Cognition [BRAIN]
(Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Lovblad, K.- O., Pereira, V. M. Tags: BRAIN Source Type: research

Prevalence and Topography of Small Hypointense Foci Suggesting Microbleeds on 3T Susceptibility-Weighted Imaging in Various Types of Dementia [BRAIN]
CONCLUSIONS: On 3T SWI, patients with VaD, AD, and DLB manifested a high SHF prevalence. In patients with AD, DLB, and FTLD, the SHF exhibited a lobar predilection. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Uetani, H., Hirai, T., Hashimoto, M., Ikeda, M., Kitajima, M., Sakamoto, F., Utsunomiya, D., Oda, S., Sugiyama, S., Matsubara, J., Yamashita, Y. Tags: BRAIN Source Type: research

Microstructural Integrity of Cerebral Fiber Tracts in Hereditary Spastic Paraparesis with SPG11 Mutation [BRAIN]
CONCLUSIONS: There was a characteristic gradation in the reduction of microstructural integrity among fiber types and within the CC in patients with the SPG11 mutation. The dying-back process in CST might explain the pathogenic mechanisms for ARHSP-TCC. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Pan, M.- K., Huang, S.- C., Lo, Y.- C., Yang, C.-C., Cheng, T.- W., Yang, C.-C., Hua, M.- S., Lee, M.- J., Tseng, W.- Y. I. Tags: BRAIN Source Type: research

T1-Weighted Dynamic Contrast-Enhanced MR Evaluation of Different Stages of Neurocysticercosis and Its Relationship with Serum MMP-9 Expression [BRAIN]
CONCLUSIONS: We conclude that kep correlates best with serum MMP-9 expression among the pharmacokinetic indices and most closely represents the degree of BBB breakdown, which is highest in the colloidal stage and lowest in the calcified stage. kep may be used as a noninvasive image biomarker of BBB breakdown in different stages of NCC. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Gupta, R. K., Awasthi, R., Garg, R. K., Kumar, N., Gupta, P. K., Singh, A. K., Sahoo, P., Paliwal, V. K., Prasad, K. N., Pandey, C. M., Rathore, R. K. S. Tags: BRAIN Source Type: research

Diagnostic Evaluation in Patients with Intractable Epilepsy and Normal Findings on MRI: A Decision Analysis and Cost-Effectiveness Study [BRAIN]
CONCLUSIONS: PET+MEG and SPECT were the preferred strategies in the base case. The choice of test was dependent on the sensitivity and specificity of test strategies and willingness to pay. Further study with a larger sample size is needed to obtain better estimates of sensitivity and specificity of diagnostic tests. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Widjaja, E., Li, B., Medina, L. S. Tags: BRAIN Source Type: research

Effect of Patient Sex on White Matter Alterations in Unilateral Medial Temporal Lobe Epilepsy with Hippocampal Sclerosis Assessed by Diffusion Tensor Imaging [BRAIN]
CONCLUSIONS: Women and men showed different patterns in extent of WM alterations associated with HS. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Oguz, K. K., Tezer, I., Sanverdi, E., Has, A. C., Bilginer, B., Dolgun, A., Saygi, S. Tags: BRAIN Source Type: research

Central Nervous System Involvement in Adults with Epidemic Hemolytic Uremic Syndrome [BRAIN]
SUMMARY: Hemolytic uremic syndrome is a multisystem disorder that is caused by infection with Shiga-toxin-producing Escherichia coli. HUS affects mainly children and is rare among adults. This retrospective case series analyzes clinical signs and MR imaging findings of 11 adult patients with HUS associated nervous system involvement during the epidemic EHEC outbreak in northern Europe with its epicenter in Hamburg in May 2011. The most prevalent imaging finding was symmetric pointy vasogenic edema of the brain stem in the acute and subacute phases of the disease (n = 5). One patient exhibited additional symmetric mesiotemp...
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Wengenroth, M., Hoeltje, J., Repenthin, J., Meyer, T. N., Bonk, F., Becker, H., Faiss, S., Stammel, O., Urban, P. P., Bruening, R. Tags: BRAIN Source Type: research

Age-Related Trends in the Treatment and Outcomes of Ruptured Cerebral Aneurysms: A Study of the Nationwide Inpatient Sample 2001-2009 [INTERVENTIONAL]
CONCLUSIONS: Between 2001 and 2009, there has been a significant increase in the proportion of patients with ruptured aneurysms undergoing endovascular coiling rather than aneurysm clipping. This increase was more pronounced in older patients. Mortality from aneurysmal subarachnoid hemorrhage decreased during the past decade, regardless of aneurysm treatment technique. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Brinjikji, W., Lanzino, G., Rabinstein, A. A., Kallmes, D. F., Cloft, H. J. Tags: INTERVENTIONAL Source Type: research

Angioarchitecture of Brain AVM Determines the Presentation with Seizures: Proposed Scoring System [INTERVENTIONAL]
CONCLUSIONS: Specific angioarchitectural characteristics of unruptured BAVMs may predict occurrence of seizures and may help in targeted treatment. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Shankar, J. J. S., Menezes, R. J., Pohlmann-Eden, B., Wallace, C., terBrugge, K., Krings, T. Tags: INTERVENTIONAL Source Type: research

Interobserver Variability in Retreatment Decisions of Recurrent and Residual Aneurysms [INTERVENTIONAL]
CONCLUSIONS: There is a large amount of interobserver variability regarding the decision to retreat an aneurysm and the type of retreatment. This variability must be reduced to increase consistency in these subjective outcome measurements. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: McDonald, J. S., Carter, R. E., Layton, K. F., Mocco, J., Madigan, J. B., Tawk, R. G., Hanel, R. A., Roy, S. S., Cloft, H. J., Klunder, A. M., Suh, S. H., Kallmes, D. F. Tags: INTERVENTIONAL Source Type: research

Recanalization with Stent-Retriever Devices in Patients with Wake-Up Stroke [INTERVENTIONAL]
CONCLUSIONS: Despite successful and rapid recanalization with stent-retriever devices, good clinical outcome in patients with wake-up stroke is achieved in a minority of patients. Clinical outcome remains poor. Bleeding rates were higher compared with recanalization procedures within 6 hours after stroke onset. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Stampfl, S., Ringleb, P. A., Haehnel, S., Rocco, A., Herweh, C., Hametner, C., Pham, M., Moehlenbruch, M., Bendszus, M., Rohde, S. Tags: INTERVENTIONAL Source Type: research

Treatment of Acute Vertebrobasilar Occlusion Using Thrombectomy with Stent Retrievers: Initial Experience with 18 Patients [INTERVENTIONAL]
CONCLUSIONS: Thrombectomy with stent retrievers is feasible in the treatment of vertebrobasilar occlusion. These initial results must be confirmed by further prospective studies with a larger number of cases. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Espinosa de Rueda, M., Parrilla, G., Zamarro, J., Garcia-Villalba, B., Hernandez, F., Moreno, A. Tags: INTERVENTIONAL Source Type: research

Sex Differences of High-Risk Carotid Atherosclerotic Plaque with Less Than 50% Stenosis in Asymptomatic Patients: An In Vivo 3T MRI Study [EXTRACRANIAL VASCULAR]
CONCLUSIONS: There is a sex difference of higher risk carotid plaque features during the early stage of disease seen in patients recruited for MR imaging evaluation of contralateral moderate-to-severe stenosis. Given the potential of using LR/NC without or with IPH to monitor therapy, these results indicate the possible importance of sex-based management in patients with asymptomatic carotid atherosclerosis across all stages of carotid stenosis. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Ota, H., Reeves, M. J., Zhu, D. C., Majid, A., Collar, A., Yuan, C., DeMarco, J. K. Tags: EXTRACRANIAL VASCULAR Source Type: research

Diffusion-Weighted MRI: Distinction of Skull Base Chordoma from Chondrosarcoma [HEAD & NECK]
CONCLUSIONS: Diffusion-weighted MR imaging may be useful in assessing clival tumors, particularly in differentiating chordoma from chondrosarcoma. A prospective study of a larger cohort will be required to determine the value of ADC in predicting histopathologic diagnosis. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Yeom, K. W., Lober, R. M., Mobley, B. C., Harsh, G., Vogel, H., Allagio, R., Pearson, M., Edwards, M. S. B., Fischbein, N. J. Tags: HEAD & amp; NECK Source Type: research

Human Papillomavirus, p16, and Epidermal Growth Factor Receptor Biomarkers and CT Perfusion Values in Head and Neck Squamous Cell Carcinoma [HEAD & NECK]
CONCLUSIONS: A significant correlation exists between CTP measures and EGFR overexpression in head and neck squamous cell carcinomas, suggesting an association between certain imaging findings and molecular biomarkers. These results may be related to a tumor cell survival mechanism linking perfusion and biomarker expression. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Hoefling, N. L., McHugh, J. B., Light, E., Kumar, B., Walline, H., Prince, M., Bradford, C., Carey, T. E., Mukherji, S. K. Tags: HEAD & amp; NECK Source Type: research

Value of MR Imaging in Differentiation between Solitary Fibrous Tumor and Schwannoma in the Orbit [HEAD & NECK]
CONCLUSIONS: MR imaging is useful in differentiating orbital SFT and schwannoma. The enhancement pattern of the very high-signal-intensity areas shown on T2-weighted imaging and the type of TICs on DCE MR imaging played an important role in differentiating orbital SFT from schwannoma. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Zhang, Z., Shi, J., Guo, J., Yan, F., Fu, L., Xian, J. Tags: HEAD & amp; NECK Source Type: research

Performance of Iterative Image Reconstruction in CT of the Paranasal Sinuses: A Phantom Study [HEAD & NECK]
CONCLUSIONS: For CT of the paranasal sinus, SAFIRE algorithms are suitable for image-noise reduction. Because image quality decreases with dosage, careful choice of the appropriate iterative method is necessary to achieve an optimal balance between image noise and quality. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Schulz, B., Beeres, M., Bodelle, B., Bauer, R., Al-Butmeh, F., Thalhammer, A., Vogl, T. J., Kerl, J. M. Tags: HEAD & amp; NECK Source Type: research

Yield of CT Angiography and Contrast-Enhanced MR Imaging in Patients with Dizziness [HEAD & NECK]
CONCLUSIONS: Imaging evaluation of the patient with uncomplicated dizziness is unlikely to identify clinically significant imaging findings and is very unlikely to result in a change in clinical management, with an overall TE of 1.0%. Thus, the routine use of imaging in the evaluation of the patient with dizziness cannot be recommended. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Fakhran, S., Alhilali, L., Branstetter, B. F. Tags: HEAD & amp; NECK Source Type: research

Oval Window Niche Height: Quantitative Evaluation with CT before Stapes Surgery for Otosclerosis [HEAD & NECK]
CONCLUSIONS: Measurements of the OWN height provide an accurate and relevant evaluation of this region before otosclerosis surgery. A width below 1.4 mm should be considered at risk for technical difficulties during the stapes footplate approach. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Ukkola-Pons, E., Ayache, D., Pons, Y., Ratajczak, M., Nioche, C., Williams, M. Tags: HEAD & amp; NECK Source Type: research

CT Findings of Sinonasal Respiratory Epithelial Adenomatoid Hamartoma: A Closer Look at the Olfactory Clefts [HEAD & NECK]
CONCLUSIONS: Both clinical presentations of REAH are associated with OC widening on CT scan. In the setting of polypoid disease, an OC width of > 10 mm should increase suspicion for the presence of REAH. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Hawley, K. A., Ahmed, M., Sindwani, R. Tags: HEAD & amp; NECK Source Type: research

Imaging Characteristics of Cerebrovascular Arteriopathy and Stroke in Hutchinson-Gilford Progeria Syndrome [PEDIATRICS]
CONCLUSIONS: We report a unique intracranial and superior cervical arteriopathy in HGPS distinct from other vasculopathies of childhood, such as Moyamoya, and cerebrovascular disease of aging, including atherosclerosis. Arterial features of the mid and lower neck are less distinctive. For the first time, we identified early and clinically silent strokes as a prevalent disease characteristic in HGPS. Longitudinal analysis of stroke incidence and vasculopathy may provide an outcome measure for future treatment interventions for children with HGPS. (Source: American Journal of Neuroradiology)
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Silvera, V. M., Gordon, L. B., Orbach, D. B., Campbell, S. E., Machan, J. T., Ullrich, N. J. Tags: PEDIATRICS Source Type: research

Comparison of Spin-Echo T1- and T2-Weighted and Gradient-Echo T1-Weighted Images at 3T in Evaluating Very Preterm Neonates at Term-Equivalent Age [PEDIATRICS]
SUMMARY: Term-equivalent imaging can assess myelination status in very preterm infants (<30 weeks' gestational age at birth). However, myelination assessment has yet to be compared among GRE-T1WI, SE-T1WI, and SE-T2WI at 3T. We aimed to compare the rates of myelination among those 3 sequences in 11 very preterm neonates who underwent 3T MR imaging at term-equivalent age and subsequently had normal neurologic development. On each sequence, 2 neuroradiologists individually assessed 22 structures. SE-T2WI depicted a higher myelination rate (present in 58.2%–66.4% of all structures) than either GRE-T1WI (51.6%–6...
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Sarikaya, B., McKinney, A. M., Spilseth, B., Truwit, C. L. Tags: PEDIATRICS Source Type: research

Dorsal Thoracic Arachnoid Web and the "Scalpel Sign": A Distinct Clinical-Radiologic Entity [SPINE]
We describe 14 patients whose imaging studies demonstrated the scalpel sign. Ten of 13 patients who underwent MR imaging demonstrated T2WI cord signal-intensity changes, and 7 of these patients also demonstrated syringomyelia adjacent to the level of indentation. Seven patients underwent surgery, with 5 demonstrating an arachnoid web as the cause of the dorsal indentation demonstrated on preoperative imaging. Although the webs themselves are rarely demonstrated on imaging, we propose that the scalpel sign is a reliable indicator of their presence and should prompt consideration of surgical lysis, which is potentially curat...
Source: American Journal of Neuroradiology - May 15, 2013 Category: Radiology Authors: Reardon, M. A., Raghavan, P., Carpenter-Bailey, K., Mukherjee, S., Smith, J. S., Matsumoto, J. A., Yen, C.- P., Shaffrey, M. E., Lee, R. R., Shaffrey, C. I., Wintermark, M. Tags: SPINE Source Type: research

Acute hormonal responses following different velocities of eccentric exercise
In conclusion, slow eccentric exercise velocity enhances more the growth hormone(GH) response than fast eccentric exercise velocity without cortisol and testosterone increases. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - May 15, 2013 Category: Radiology Authors: Cleiton A. Libardi, Felipe R. D. Nogueira, Felipe C. Vechin, Miguel S. Conceição, Valéria Bonganha, Mara Patricia T. Chacon‐Mikahil Tags: Original Article Source Type: research

Functional MRI in conscious rats using a chronically implanted surface coil
ConclusionThis methodology leaves the face and limbs free from obstruction, making possible a range of behavioral or sensory stimulation protocols. Further development of this animal model could enable traditional behavioral neuroscience techniques to be combined with modern functional neuroimaging. J. Magn. Reson. Imaging 2013. © 2013 Wiley Periodicals, Inc. (Source: Journal of Magnetic Resonance Imaging)
Source: Journal of Magnetic Resonance Imaging - May 15, 2013 Category: Radiology Authors: Chris J. Martin, Aneurin J. Kennerley, Jason Berwick, Michael Port, John E.W. Mayhew Tags: Technical Note Source Type: research

Enhancement of liver and pancreas on late hepatic arterial phase Imaging: Quantitative comparison among multiple gadolinium‐based contrast agents at 1.5 tesla MRI
ConclusionOur study describes % enhancement of liver and pancreas using various GBCAs. The data may provide reference material on relaxation properties of GBCAs in vivo. J. Magn. Reson. Imaging 2013. © 2013 Wiley Periodicals, Inc. (Source: Journal of Magnetic Resonance Imaging)
Source: Journal of Magnetic Resonance Imaging - May 15, 2013 Category: Radiology Authors: Mi Jeong Kim, Seong Hyun Kim, Hee Jin Kim, Bong Soo Kim, Mateus Hernandes, Richard C. Semelka Tags: Original Research Source Type: research

Comparison of three‐dimensional pseudo‐continuous arterial spin labeling perfusion imaging with gradient‐echo and spin‐echo dynamic susceptibility contrast MRI
ConclusionThis study suggested that perfusion images obtained from 3D‐PCASL exhibited significant correlations with DSC‐MRI, with greater microvascular weighting like SE‐DSC. J. Magn. Reson. Imaging 2013. © 2013 Wiley Periodicals, Inc. (Source: Journal of Magnetic Resonance Imaging)
Source: Journal of Magnetic Resonance Imaging - May 15, 2013 Category: Radiology Authors: Alex M. Wong, Feng‐Xian Yan, Ho‐Ling Liu Tags: Original Research Source Type: research

3 tesla 1H MR spectroscopy of hip bone marrow in a healthy population, assessment of normal fat content values and influence of age and sex
ConclusionWe obtained normal spectroscopic FC values from different areas of the hip, according to age and sex. These values may be used as reference values to evaluate, by the means of 1H MR spectroscopy, pathological conditions affecting hip bone marrow. J. Magn. Reson. Imaging 2013. © 2013 Wiley Periodicals, Inc. (Source: Journal of Magnetic Resonance Imaging)
Source: Journal of Magnetic Resonance Imaging - May 15, 2013 Category: Radiology Authors: Vittorio Pansini, Aurélien Monnet, Julia Salleron, Pierre Hardouin, Bernard Cortet, Anne Cotten Tags: Original Research Source Type: research

DTI of human skeletal muscle: the effects of diffusion encoding parameters, signal‐to‐noise ratio and T2 on tensor indices and fiber tracts
In this study, we have performed simulations to address the effects of diffusion encoding parameters, signal‐to‐noise ratio (SNR) and T2 on skeletal muscle diffusion tensor indices and fiber tracts. Where appropriate, simulations were corroborated and validated by in vivo diffusion tensor imaging (DTI) of human skeletal muscle. Specifically, we have addressed: (i) the accuracy and precision of the diffusion parameters and eigenvectors at different SNR levels; (ii) the effects of the diffusion gradient direction encoding scheme; (iii) the optimal b value for diffusion tensor estimation; (iv) the effects of changes in sk...
Source: NMR in Biomedicine - May 14, 2013 Category: Radiology Authors: Martijn Froeling, Aart J. Nederveen, Klaas Nicolay, Gustav J. Strijkers Tags: Research article Source Type: research

Coronary Stenosis: Morphologic Index Characterized by Using CT Angiography Correlates with Fractional Flow Reserve and Is Associated with Hemodynamic Status [Cardiac Imaging]
The ratio of lesion length to the 4th power of minimal lumen diameter, as characterized by using coronary CT angiography, inversely correlates with fractional flow reserve measurements and is associated with the hemodynamic status of coronary stenoses. (Source: Continuous Publishing articles)
Source: Continuous Publishing articles - May 14, 2013 Category: Radiology Authors: Li, M., Zhang, J., Pan, J., Lu, Z. Tags: Cardiac Radiology Cardiac Imaging Source Type: research