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Journal of Magnetic Resonance Imaging: JMRI

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https://www.readbyqxmd.com/read/28083996/pulmonary-lesion-characterization-using-diffusion-weighted-imaging-attention-should-be-paid-to-patient-inclusion-criteria-and-scanning-parameters
#1
LETTER
Qi Wan, Yudong Yu, Yingying Bao, Qiang Lei, Qiao Zou, Yingshi Deng, Xinchun Li
No abstract text is available yet for this article.
January 13, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28083913/gadolinium-based-contrast-agents-a-comprehensive-risk-assessment
#2
REVIEW
Tyler J Fraum, Daniel R Ludwig, Mustafa R Bashir, Kathryn J Fowler
: Gadolinium-based contrast agents (GBCAs) have been used in magnetic resonance imaging (MRI) since the 1980s and are now administered in up to 35% of all MRI examinations. While GBCAs were initially felt to carry minimal risk, the subsequent identification of GBCAs as the key etiologic factor in the development of nephrogenic systemic fibrosis (NSF) has raised concerns about the broader health impacts of gadolinium exposure. Clinicians, radiologists, and patients should be aware of the most up-to-date data pertaining to the risks of GBCA administration...
January 13, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28083902/liver-imaging-reporting-and-data-system-category-4-observations-in-mri-risk-factors-predicting-upgrade-to-category-5
#3
Keitaro Sofue, Lauren M B Burke, Viragi Nilmini, Madavi Alagiyawanna, Andrew J Muir, Kingshuk R Choudhury, Tracy A Jaffe, Richard C Semelka, Mustafa R Bashir
PURPOSE: To identify demographic and imaging features in magnetic resonance imaging (MRI) that are associated with upgrade of Liver Imaging Reporting and Data System (LI-RADS) category 4 (LR-4) observations to category 5 (LR-5), and to assess their effects on risk of upgrade and time to upgrade. MATERIALS AND METHODS: Institutional Review Board approval was obtained for this retrospective, dual-institution Health Insurance Portability and Accountability Act (HIPAA)-compliant study...
January 13, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28067978/imaging-left-ventricular-mechanical-activation-in-heart-failure-patients-using-cine-dense-mri-validation-and-implications-for-cardiac-resynchronization-therapy
#4
Daniel A Auger, Kenneth C Bilchick, Jorge A Gonzalez, Sophia X Cui, Jeffrey W Holmes, Christopher M Kramer, Michael Salerno, Frederick H Epstein
PURPOSE: To image late mechanical activation and identify effective left-ventricular (LV) pacing sites for cardiac resynchronization therapy (CRT). There is variability in defining mechanical activation time, with some studies using the time to peak strain (TPS) and some using the time to the onset of circumferential shortening (TOS). We developed improved methods for imaging mechanical activation and evaluated them in heart failure (HF) patients undergoing CRT. MATERIALS AND METHODS: We applied active contours to cine displacement encoding with stimulated echoes (DENSE) strain images to detect TOS...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28067975/assessment-of-acute-thermal-damage-volumes-in-muscle-using-magnetization-prepared-3d-t2-weighted-imaging-following-mri-guided-high-intensity-focused-ultrasound-therapy
#5
Robert M Staruch, Joris Nofiele, Jamie Walker, Chenchen Bing, Ananth J Madhuranthakam, April Bailey, Young-Sun Kim, Avneesh Chhabra, Dennis Burns, Rajiv Chopra
PURPOSE: To evaluate magnetization-prepared 3D T2 -weighted magnetic resonance imaging (MRI) measurements of acute tissue changes produced during ablative MR high-intensity focused ultrasound (MR-HIFU) exposures. MATERIALS AND METHODS: A clinical MR-HIFU system (3T) was used to generate thermal lesions (n = 24) in the skeletal muscles of three pigs. T1 -weighted, 2D T2 -weighted, and magnetization-prepared 3D T2 -weighted sequences were acquired before and after therapy to evaluate tissue changes following ablation...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28067973/simultaneous-multislice-readout-segmented-echo-planar-imaging-for-accelerated-diffusion-tensor-imaging-of-the-mandibular-nerve-a-feasibility-study
#6
Andrei Manoliu, Michael Ho, Marco Piccirelli, Daniel Nanz, Lukas Filli, Evelyn Dappa, Wei Liu, Dominik A Ettlin, Andreas Boss, Gustav Andreisek, Felix P Kuhn
PURPOSE: To assess the feasibility of diffusion tensor imaging (DTI) using simultaneous multislice (SMS) acquisition with blipped controlled aliasing in parallel imaging (CAIPI) for accelerated readout-segmented echo planar imaging (rs-EPI) of the mandibular nerves. DTI of the mandibular nerves using EPI is challenging due to susceptibility artifacts. Rs-EPI is less prone to artifacts but associated with longer scan durations. MATERIALS AND METHODS: Eight asymptomatic volunteers were imaged at 3T using a 64-channel head/neck coil...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28061015/impact-of-vessel-wall-lesions-and-vascular-stenoses-on-cerebrovascular-reactivity-in-patients-with-intracranial-stenotic-disease
#7
Petrice M Cogswell, Taylor L Davis, Megan K Strother, Carlos C Faraco, Allison O Scott, Lori C Jordan, Matthew R Fusco, Blaise deB Frederick, Jeroen Hendrikse, Manus J Donahue
PURPOSE: To compare cerebrovascular reactivity (CVR) and CVR lagtimes in flow territories perfused by vessels with vs. without proximal arterial wall disease and/or stenosis, separately in patients with atherosclerotic and nonatherosclerotic (moyamoya) intracranial stenosis. MATERIALS AND METHODS: Atherosclerotic and moyamoya patients with >50% intracranial stenosis and <70% cervical stenosis underwent angiography, vessel wall imaging (VWI), and CVR-weighted imaging (n = 36; vessel segments evaluated = 396)...
January 6, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28054731/lung-adenocarcinoma-assessment-of-epidermal-growth-factor-receptor-mutation-status-based-on-extended-models-of-diffusion-weighted-image
#8
Mei Yuan, Xue-Hui Pu, Xiao-Quan Xu, Yu-Dong Zhang, Yan Zhong, Hai Li, Jiang-Fen Wu, Tong-Fu Yu
PURPOSE: To evaluate the diagnostic performance of extended models of diffusion-weighted (DW) imaging to help differentiate the epidermal growth factor receptor (EGFR) mutation status in stage IIIA-IV lung adenocarcinoma. MATERIALS AND METHODS: This retrospective study had institutional research board approval and was HIPAA compliant. Preoperative extended DW imaging including intravoxel incoherent motion (IVIM) and diffusional kurtosis imaging (DKI) 3 Tesla MRI were retrospectively evaluated in 53 patients with pathologically confirmed non-early stage (IIIA-IV) lung adenocarcinoma...
January 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28019053/prestructural-cartilage-assessment-using-mri
#9
Thomas M Link, Jan Neumann, Xiaojuan Li
: Cartilage loss is irreversible, and to date, no effective pharmacotherapies are available to protect or regenerate cartilage. Quantitative prestructural/compositional MR imaging techniques have been developed to characterize the cartilage matrix quality at a stage where abnormal findings are early and potentially reversible, allowing intervention to halt disease progression. The goal of this article is to critically review currently available technologies, present the basic concept behind these techniques, but also to investigate their suitability as imaging biomarkers including their validity, reproducibility, risk prediction and monitoring of therapy...
December 26, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28019046/evaluation-of-neonatal-brain-myelination-using-the-t1-and-t2-weighted-mri-ratio
#10
Jennifer E Soun, Michael Z Liu, Keith A Cauley, Jack Grinband
PURPOSE: To validate the T1- and T2-weighted (T1w/T2w) MRI ratio technique in evaluating myelin in the neonatal brain. MATERIALS AND METHODS: T1w and T2w MR images of 10 term neonates with normal-appearing brain parenchyma were obtained from a single 1.5 Tesla MRI and retrospectively analyzed. T1w/T2w ratio images were created with a postprocessing pipeline and qualitatively compared with standard clinical sequences (T1w, T2w, and apparent diffusion coefficient [ADC])...
December 26, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28001320/dynamic-multi-echo-dce-and-dsc-mri-in-rectal-cancer-low-primary-tumor-k-trans-and-%C3%AE-r2-peak-are-significantly-associated-with-lymph-node-metastasis
#11
Endre Grøvik, Kathrine Røe Redalen, Tryggve Holck Storås, Anne Negård, Stein Harald Holmedal, Anne Hansen Ree, Sebastian Meltzer, Atle Bjørnerud, Kjell-Inge Gjesdal
PURPOSE: To implement a dynamic contrast-based multi-echo MRI sequence in assessment of rectal cancer and evaluate associations between histopathologic data and the acquired dynamic contrast-enhanced (DCE) and dynamic susceptibility contrast (DSC) -MRI parameters. MATERIALS AND METHODS: This pilot study reports results from 17 patients with resectable rectal cancer. Dynamic contrast-based multi-echo MRI (1.5T) was acquired using a three-dimensional multi-shot EPI sequence, yielding both DCE- and DSC-data following a single injection of contrast agent...
December 21, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27990722/radiomic-features-for-prostate-cancer-detection-on-mri-differ-between-the-transition-and-peripheral-zones-preliminary-findings-from-a-multi-institutional-study
#12
Shoshana B Ginsburg, Ahmad Algohary, Shivani Pahwa, Vikas Gulani, Lee Ponsky, Hannu J Aronen, Peter J Boström, Maret Böhm, Anne-Maree Haynes, Phillip Brenner, Warick Delprado, James Thompson, Marley Pulbrock, Pekka Taimen, Robert Villani, Phillip Stricker, Ardeshir R Rastinehad, Ivan Jambor, Anant Madabhushi
PURPOSE: To evaluate in a multi-institutional study whether radiomic features useful for prostate cancer (PCa) detection from 3 Tesla (T) multi-parametric MRI (mpMRI) in the transition zone (TZ) differ from those in the peripheral zone (PZ). MATERIALS AND METHODS: 3T mpMRI, including T2-weighted (T2w), apparent diffusion coefficient (ADC) maps, and dynamic contrast-enhanced MRI (DCE-MRI), were retrospectively obtained from 80 patients at three institutions. This study was approved by the institutional review board of each participating institution...
December 19, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27990708/temporal-accumulation-and-localization-of-isoflurane-in-the-c57bl-6-mouse-and-assessment-of-its-potential-contamination-in-19-f-mri-with-perfluoro-crown-ether-labeled-cardiac-progenitor-cells-at-9-4-tesla
#13
Christakis Constantinides, Mahon L Maguire, Leeanne Stork, Edyta Swider, Mangala Srinivas, Carolyn A Carr, Jurgen E Schneider
PURPOSE: To assess the uptake, accumulation, temporal stability, and spatial localization of isoflurane (ISO) in the C57BL/6 mouse, and to identify its potential interference with the detection of labeled cardiac progenitor cells using (19) F MRI/MR spectroscopy (MRS). MATERIALS AND METHODS: Objectives are demonstrated using (a) in vitro ISO tests, (b) in vivo temporal accumulation/spatial localization C57BL/6 studies (n = 3), and (c) through injections of perfluoro-crown-ether (PFCE) labeled cardiac progenitor cells into femoral muscle areas of the murine hindlimb post-mortem (n = 1) using (1) H/(19) F MRI/MRS at 9...
December 19, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27981751/liver-fibrosis-review-of-current-imaging-and-mri-quantification-techniques
#14
REVIEW
Léonie Petitclerc, Giada Sebastiani, Guillaume Gilbert, Guy Cloutier, An Tang
: Liver fibrosis is characterized by the accumulation of extracellular matrix proteins such as collagen in the liver interstitial space. All causes of chronic liver disease may lead to fibrosis and cirrhosis. The severity of liver fibrosis influences the decision to treat or the need to monitor hepatic or extrahepatic complications. The traditional reference standard for diagnosis of liver fibrosis is liver biopsy. However, this technique is invasive, associated with a risk of sampling error, and has low patient acceptance...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27981667/assessment-of-pathological-complete-response-to-preoperative-chemoradiotherapy-by-means-of-multiple-mathematical-models-of-diffusion-weighted-mri-in-locally-advanced-rectal-cancer-a-prospective-single-center-study
#15
Hai-Bin Zhu, Xiao-Yan Zhang, Xiao-Hong Zhou, Xiao-Ting Li, Yu-Liang Liu, Shuai Wang, Ying-Shi Sun
PURPOSE: To assess stretched-exponential, mono-exponential and intravoxel incoherent motion (IVIM) models of diffusion-weighted MRI(DWI) in predicting pathological complete response (pCR) to neoadjuvant chemoradiotherapy (CRT) in rectal cancer patients. MATERIALS AND METHODS: This prospective study recruited 98 consecutive patients with locally advanced rectal cancer who underwent 3 Tesla MR examination before, during and after CRT. The apparent diffusion coefficient (ADC), IVIM-derived parameters (D, f, and D*), and stretched-exponential model-derived parameters (DDC and α) were measured...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27981665/hip-mri-prevalence-of-articular-cartilage-defects-and-labral-tears-in-asymptomatic-volunteers-a-comparison-with-a-matched-population-of-patients-with-femoroacetabular-impingement
#16
Florian Tresch, Tobias J Dietrich, Christian W A Pfirrmann, Reto Sutter
PURPOSE: To prospectively compare defects of the articular cartilage and labrum in asymptomatic volunteers and in patients with femoroacetabular impingement (FAI) matched for age and gender. MATERIALS AND METHODS: This cross-sectional study was institutional review board approved. A total of 63 asymptomatic volunteers and 63 patients with symptomatic FAI between 20 and 50 years underwent 1.5 Tesla MRI (coronal T1-weighted, coronal intermediate-weighted fat saturated, transverse oblique true fast imaging with steady-state precession [FISP], sagittal dual echo steady state [DESS] sequence)...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27981664/compressed-sensing-for-body-mri
#17
REVIEW
Li Feng, Thomas Benkert, Kai Tobias Block, Daniel K Sodickson, Ricardo Otazo, Hersh Chandarana
: The introduction of compressed sensing for increasing imaging speed in magnetic resonance imaging (MRI) has raised significant interest among researchers and clinicians, and has initiated a large body of research across multiple clinical applications over the last decade. Compressed sensing aims to reconstruct unaliased images from fewer measurements than are traditionally required in MRI by exploiting image compressibility or sparsity. Moreover, appropriate combinations of compressed sensing with previously introduced fast imaging approaches, such as parallel imaging, have demonstrated further improved performance...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27981651/mr-spectroscopy-of-breast-cancer-for-assessing-early-treatment-response-results-from-the-acrin-6657-mrs-trial
#18
Patrick J Bolan, Eunhee Kim, Benjamin A Herman, Gillian M Newstead, Mark A Rosen, Mitchell D Schnall, Etta D Pisano, Paul T Weatherall, Elizabeth A Morris, Constance D Lehman, Michael Garwood, Michael T Nelson, Douglas Yee, Sandra M Polin, Laura J Esserman, Constantine A Gatsonis, Gregory J Metzger, David C Newitt, Savannah C Partridge, Nola M Hylton
PURPOSE: To estimate the accuracy of predicting response to neoadjuvant chemotherapy (NACT) in patients with locally advanced breast cancer using MR spectroscopy (MRS) measurements made very early in treatment. MATERIALS AND METHODS: This prospective Health Insurance Portability and Accountability Act (HIPAA)-compliant protocol was approved by the American College of Radiology and local-site institutional review boards. One hundred nineteen women with invasive breast cancer of ≥3 cm undergoing NACT were enrolled between September 2007 and April 2010...
December 16, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27943528/erroneous-data-on-renal-hemodynamics-derived-from-dce-mri-in-rats
#19
LETTER
Kathleen Cantow, Bert Flemming, Erdmann Seeliger
No abstract text is available yet for this article.
December 9, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27943484/utility-of-mr-enterography-and-ultrasound-for-the-investigation-of-small-bowel-crohn-s-disease
#20
REVIEW
Gauraang Bhatnagar, Conrad Von Stempel, Steve Halligan, Stuart A Taylor
: Cross sectional Imaging plays an increasingly important role the diagnosis and management of Crohn's disease. Particular emphasis is placed on MRI and Ultrasound as they do not impart ionising radiation. Both modalities have reported high sensitivity for disease detection, activity assessment and evaluation of extra-luminal complications, and have positive effects on clinical decision making. International Guidelines now recommend MRI and Ultrasound in the routine management of Crohn's disease patients...
December 9, 2016: Journal of Magnetic Resonance Imaging: JMRI
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