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Journal of Magnetic Resonance Imaging: JMRI

Ahmed M Elkady, Dana Cobzas, Hongfu Sun, Gregg Blevins, Alan H Wilman
BACKGROUND: Combined R2* and quantitative susceptibility (QS) has been previously used in cross-sectional multiple sclerosis (MS) studies to distinguish deep gray matter (DGM) iron accumulation and demyelination. PURPOSE: We propose and apply discriminative analysis of regional evolution (DARE) to define specific changes in MS and healthy DGM. STUDY TYPE: Longitudinal (baseline and 2-year follow-up) retrospective study. SUBJECTS: Twenty-seven relapsing-remitting MS (RRMS), 17 progressive MS (PMS), and corresponding age-matched healthy subjects...
March 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
Min Wang, Feng Gao, Xiaoqi Wang, Yanqing Liu, Ruoyun Ji, Lizhuo Cang, Yu Shi
BACKGROUND: Early detection and classification of chronic pancreatitis (CP) are both important and challenging. PURPOSE: To investigate the diagnostic performance of MR elastography (MRE) and T1 mapping of the pancreas for different stages of CP. STUDY TYPE: Retrospective. SUBJECTS: Clinical and imaging records of 81 patients (from 5/2015 to 7/2017) with suspected CP were analyzed. Patients were categorized into the normal control (n = 35), mild CP (n = 30), and moderate/severe CP groups (n = 16) according to the Cambridge Classification based on concordant endoscopic retrograde cholangiopancreatography or ultrasound endoscopy findings...
March 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
Bei-Bei Wu, Ye Ma, Lei Xie, Jin-Zhuang Huang, Zong-Bo Sun, Zhi-Duo Hou, Rui-Wei Guo, Zhi-Rong Lin, Shou-Xing Duan, Shan-Shan Zhao, Yao-Xie, Dan-Miao Sun, Chun-Min Zhu, Shu-Hua Ma
BACKGROUND: Systemic lupus erythematosus (SLE) is associated with cognitive deficit but the exact neural mechanisms remain unclear. PURPOSE: To explore sequential brain activities using functional magnetic resonance imaging (fMRI) during the performance of a decision-making task, and to determine whether serum or clinical markers can reflect the involvement of the brain in SLE. SUBJECTS: Sixteen female SLE patients without overt clinical neuropsychiatric symptoms and 16 healthy controls were included...
March 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
John Whitaker, Cory M Tschabrunn, Jihye Jang, Eran Leshem, Mark O'Neill, Warren J Manning, Elad Anter, Reza Nezafat
BACKGROUND: Myocardial infarction (MI) survivors are at risk of complications including heart failure and malignant arrhythmias. PURPOSE: We undertook serial imaging of swine following MI with the aim of characterizing the longitudinal left ventricular (LV) remodeling in a translational model of ischemia-reperfusion-mediated MI. ANIMAL MODEL: Eight Yorkshire swine underwent mid left anterior descending coronary artery balloon occlusion to create an ischemia-reperfusion experimental model of MI...
March 9, 2018: Journal of Magnetic Resonance Imaging: JMRI
Lu-Ping Li, Jon Thacker, Wei Li, Huan Tan, Chi Wang, Orly Kohn, Stuart Sprague, Pottumarthi Prasad
BACKGROUND: Identification of patients with progressive chronic kidney disease (CKD) and those likely to respond to candidate therapeutics is urgently needed. Functional MRI measurements have shown promise. However, knowledge about the consistency of the measurements is essential to conduct longitudinal studies. PURPOSE/HYPOTHESIS: To investigate the consistency of repeated functional MRI measurements in healthy subjects. STUDY TYPE: Prospective, longitudinal study...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Daniel F Alamidi, Amir Smailagic, Abdel W Bidar, Nicole S Parker, Marita Olsson, Paul D Hockings, Kerstin M Lagerstrand, Lars E Olsson
BACKGROUND: Lung T1 is a potential translational biomarker of lung disease. The precision and repeatability of variable flip angle (VFA) T1 mapping using modern 3D ultrashort echo time (UTE) imaging of the whole lung needs to be established before it can be used to assess response to disease and therapy. PURPOSE: To evaluate the feasibility of regional lung T1 quantification with VFA 3D-UTE and to investigate long- and short-term T1 repeatability in the lungs of naive mice...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Ilona A Dekkers, Paul de Heer, Maurice B Bizino, Aiko P J de Vries, Hildo J Lamb
BACKGROUND: Renal steatosis (fatty kidney) is a potential biomarker for obesity-related renal disease; however, noninvasive assessment of renal fat content remains a technical challenge. PURPOSE: To evaluate reproducibility and explore clinical application of renal metabolic imaging for the quantification of renal triglyceride content (TG) using proton magnetic resonance spectroscopy (1 H-MRS). STUDY TYPE: Reproducibility and clinical cohort study...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Anna Luzurier, Paul-Hugo Jouve De Guibert, Alexandre Allera, Sarah F Feldman, Pierre Conort, Jean Marc Simon, Pierre Mozer, Eva Compérat, Franck Boudghene, Vincent Servois, Olivier Lucidarme, Benjamin Granger, Raphaele Renard-Penna
BACKGROUND: The incremental value of dynamic contrast-enhanced (DCE) imaging in localizing radiorecurrent prostate cancer is uncertain. PURPOSE: To assess the added-value of DCE imaging to the combination T2 -weighted imaging (T2 W)+diffusion-weighted imaging (DWI) in detecting locally radiorecurrent prostate cancer (PCa), by radiologists with different levels of experience. STUDY TYPE: Analytic retrospective study. POPULATION: In all, 52 men with biological suspected PCa recurrence after radiotherapy were retrospectively included...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Kevin T Chen, Stephanie Salcedo, Daniel B Chonde, David Izquierdo-Garcia, Michael A Levine, Julie C Price, Bradford C Dickerson, Ciprian Catana
BACKGROUND: Subject motion in positron emission tomography (PET) studies leads to image blurring and artifacts; simultaneously acquired magnetic resonance imaging (MRI) data provides a means for motion correction (MC) in integrated PET/MRI scanners. PURPOSE: To assess the effect of realistic head motion and MR-based MC on static [18 F]-fluorodeoxyglucose (FDG) PET images in dementia patients. STUDY TYPE: Observational study. POPULATION: Thirty dementia subjects were recruited...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Kofi Deh, Gerald D Ponath, Zaki Molvi, Gian-Carlo T Parel, Kelly M Gillen, Shun Zhang, Thanh D Nguyen, Pascal Spincemaille, Yinghua Ma, Ajay Gupta, Susan A Gauthier, David Pitt, Yi Wang
BACKGROUND: The pathological processes in the first weeks of multiple sclerosis (MS) lesion formation include myelin digestion that breaks chemical bonds in myelin lipid layers. This can increase lesion magnetic susceptibility, which is a potentially useful biomarker in MS patient management, but not yet investigated. PURPOSE: To understand and quantify the effects of myelin digestion on quantitative susceptibility mapping (QSM) of MS lesions. STUDY TYPE: Histological and QSM analyses on in vitro models of myelin breakdown and MS lesion formation in vivo...
March 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Huimin Lin, Caixia Fu, Stephan Kannengiesser, Shu Cheng, Jun Shen, Haipeng Dong, Fuhua Yan
BACKGROUND: The coexistence of hepatic iron and fat is common in patients with hyperferritinemia, which plays an interactive and aggressive role in the progression of diseases (fibrosis, cirrhosis, and hepatocellular carcinomas). PURPOSE: To evaluate a modified high-speed T2 -corrected multi-echo, single voxel spectroscopy sequence (HISTOV) for liver iron concentration (LIC) quantification in patients with hyperferritinemia, with simultaneous fat fraction (FF) estimation...
March 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
Neil J Stewart, Ho-Fung Chan, Paul J C Hughes, Felix C Horn, Graham Norquay, Madhwesha Rao, Denise P Yates, Rob H Ireland, Matthew Q Hatton, Bilal A Tahir, Paul Ford, Andrew J Swift, Rod Lawson, Helen Marshall, Guilhem J Collier, Jim M Wild
BACKGROUND: To support translational lung MRI research with hyperpolarized129 Xe gas, comprehensive evaluation of derived quantitative lung function measures against established measures from3 He MRI is required. Few comparative studies have been performed to date, only at 3T, and multisession repeatability of129 Xe functional metrics have not been reported. PURPOSE/HYPOTHESIS: To compare hyperpolarized129 Xe and3 He MRI-derived quantitative metrics of lung ventilation and microstructure, and their repeatability, at 1...
March 5, 2018: Journal of Magnetic Resonance Imaging: JMRI
Ying-Yuan Chen, Ching-Lan Wu, Shu-Huei Shen
BACKGROUND: The diffusion-weighted imaging (DWI) signals of the female pelvic bone marrow show great variability and are usually high in female patients with fibroid-associated symptoms and anemia. PURPOSE: To ascertain clinical factors contributing to high signal intensity in the bone marrow of the female pelvis on DWI. STUDY TYPE: Retrospective case-control study. SUBJECTS: A single-institution review of 221 female patients underwent a pelvic magnetic resonance study from December 2012 to July 2014...
March 5, 2018: Journal of Magnetic Resonance Imaging: JMRI
Feifei Qu, Pei-Herng Hor, John Fischer, Raja Muthupillai
BACKGROUND: Diminished signal intensity of uterine fibroids in T2 -weighted images is routinely used as a qualitative marker of fibroid hypoperfusion. However, quantitative classification of fibroid perfusion with intravoxel incoherent motion (IVIM) model-based metrics is not yet clinically accepted. PURPOSE: To investigate the influence of T2 correction on the estimation of IVIM model parameters for characterizing uterine fibroid tissue. STUDY TYPE: Prospective...
March 5, 2018: Journal of Magnetic Resonance Imaging: JMRI
Michael Hunter Lanier, Anup S Shetty, Amber Salter, Geetika Khanna
BACKGROUND: Gadolinium deposition in normal tissues is being increasingly recognized. Children with inflammatory bowel disease (IBD) undergo frequent imaging with contrast-enhanced MR enterography (MRE). PURPOSE: To determine the impact of intravenous (IV) gadolinium in assessment of pediatric IBD by MRE. STUDY TYPE: Retrospective, case series. POPULATION: Radiology information system was searched to identify all children who underwent MRE and endoscopy within 30 days in 2016...
March 5, 2018: Journal of Magnetic Resonance Imaging: JMRI
Qiang Zeng, Chenhan Ling, Feina Shi, Fei Dong, Biao Jiang, Jianmin Zhang
BACKGROUND: Glioma cells may infiltrate beyond the tumor margins revealed on conventional structural images. PURPOSE: To investigate whether the presence of a glioma infiltration sign on high b-value diffusion-weighted imaging (DWI) can predict the prognosis of gliomas. STUDY TYPE: Retrospective cohort. SUBJECTS: Fifty-two patients with gliomas (14 WHO grade II; 13 WHO grade III; 25 WHO grade IV). FIELD STRENGTH/SEQUENCE: 3...
March 1, 2018: Journal of Magnetic Resonance Imaging: JMRI
Xiaochuan Wang, Wenping Wei, Fengjuan Yuan, Shanhua Li, Jianzhong Lin, Jiaxing Zhang
BACKGROUND: It is known that a neurologic sequence occurs at high altitudes (HA); hence, cerebral blood flow (CBF) might vary by altitude. PURPOSE: To use arterial spin labeled (ASL) MRI to evaluate absolute CBF differences between subjects who live at HA and lowlands. STUDY TYPE: Cohort prospective trial. POPULATION: In all, 64 HA Tibetans, 19 lowland Tibetans, and 25 lowland Han subjects. FIELD STRENGTH/SEQUENCE: CBF was measured with the pulsed ASL sequence at 3T...
March 1, 2018: Journal of Magnetic Resonance Imaging: JMRI
Yuto Kobayashi, Tamotsu Kamishima, Hiroyuki Sugimori, Shota Ichikawa, Atsushi Noguchi, Michihito Kono, Toshitake Iiyama, Kenneth Sutherland, Tatsuya Atsumi
BACKGROUND: Synovitis, which is a hallmark of rheumatoid arthritis (RA), needs to be precisely quantified to determine the treatment plan. Time-intensity curve (TIC) shape analysis is an objective assessment method for characterizing the pixels as artery, inflamed synovium, or other tissues using dynamic contrast-enhanced MRI (DCE-MRI). PURPOSE/HYPOTHESIS: To assess the feasibility of our original arterial mask subtraction method (AMSM) with mutual information (MI) for quantification of synovitis in RA...
March 1, 2018: Journal of Magnetic Resonance Imaging: JMRI
Chun-Ming Chen, Yen-Chih Huang, Cheng-Ting Shih, Yung-Fang Chen, Shin-Lei Peng
BACKGROUND: Whole-brain global cerebral blood flow (CBF) determined by MRI techniques, calculated using total CBF (TCBF) from phase-contrast MRI (PC-MRI), and brain parenchyma volume (BPV) from T1 -weighted image, have become increasingly popular in many applications. PURPOSE/HYPOTHESIS: To determine if MRI-based measurements of whole-brain global CBF data obtained across different field strengths could be merged, TCBF and BPV data acquired at 1.5T and 3T were compared...
February 25, 2018: Journal of Magnetic Resonance Imaging: JMRI
Waleed Brinjikji, J Kevin DeMarco, Robert Shih, Giuseppe Lanzino, Alejandro A Rabinstein, Christopher A Hilditch, Patrick J Nicholson, John Huston
BACKGROUND: Carotid plaque imaging with MRI is becoming more commonplace, but practical challenges exist in performing plaque imaging with surface coils. PURPOSE: To compare the diagnostic performance of a carotid plaque MRI protocol using a standard neurovascular coil (Neurovascular Coil Protocol) to a higher-resolution carotid plaque MRI using carotid surface coils (Surface Coil Protocol) in characterizing carotid plaque. STUDY TYPE: Prospective study comparing two MR techniques in plaque characterization...
February 25, 2018: Journal of Magnetic Resonance Imaging: JMRI
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