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Journal of Magnetic Resonance Imaging: JMRI

Zhuangsheng Liu, Bao Feng, Changlin Li, Yehang Chen, Qinxian Chen, Xiaoping Li, Jianhua Guan, Xiangmeng Chen, Enming Cui, Ronggang Li, Zhi Li, Wansheng Long
BACKGROUND: Lymphovascular invasion (LVI) status facilitates the selection of optimal therapeutic strategy for breast cancer patients, but in clinical practice LVI status is determined in pathological specimens after resection. PURPOSE: To explore the use of dynamic contrast-enhanced (DCE)-magnetic resonance imaging (MRI)-based radiomics for preoperative prediction of LVI in invasive breast cancer. STUDY TYPE: Prospective. POPULATION: Ninety training cohort patients (22 LVI-positive and 68 LVI-negative) and 59 validation cohort patients (22 LVI-positive and 37 LVI-negative) were enrolled...
February 17, 2019: Journal of Magnetic Resonance Imaging: JMRI
Kyunghyun Sung
BACKGROUND: An estimation of an intravascular dispersion parameter was previously proposed to improve the overall accuracy and precision of the model parameters, but the high computation complexity can limit its practical usability in prostate dynamic contrast-enhanced MRI (DCE-MRI). PURPOSE: To compare and evaluate the model fitting uncertainty and error in the model parameter estimation using different DCE-MRI analysis models and to evaluate the ability of the intravascular dispersion parameter to delineate between noncancerous and cancerous prostate tissue in the transition and peripheral zones...
February 17, 2019: Journal of Magnetic Resonance Imaging: JMRI
William E Moody, Lucy E Hudsmith, Ben Holloway, Thomas A Treibel, Rhodri Davies, Rebecca Kozor, Christian Hamilton-Craig, Nicola C Edwards, William M Bradlow, James C Moon, Richard P Steeds
5 Technical Efficacy Stage: 2 J. Magn. Reson. Imaging 2019.
February 17, 2019: Journal of Magnetic Resonance Imaging: JMRI
Vincent Stephen Evans, Francisco Torrealdea, Marilena Rega, Mrishta Brizmohun Appayya, Arash Latifoltojar, Harbir Sidhu, Mina Kim, Aaron Kujawa, Shonit Punwani, Xavier Golay, David Atkinson
BACKGROUND: Chemical exchange saturation transfer (CEST) can potentially support cancer imaging with metabolically derived information. Multiparametric prostate MRI has improved diagnosis but may benefit from additional information to reduce the need for biopsies. PURPOSE: To optimize an acquisition and postprocessing protocol for 3.0 T multipool CEST analysis of prostate data and evaluate the repeatability of the technique. STUDY TYPE: Prospective...
February 15, 2019: Journal of Magnetic Resonance Imaging: JMRI
Aaryani Tipirneni-Sajja, Axel J Krafft, Ralf B Loeffler, Ruitian Song, Armita Bahrami, Jane S Hankins, Claudia M Hillenbrand
BACKGROUND: Measuring hepatic R2* by fitting a monoexponential model to the signal decay of a multigradient-echo (mGRE) sequence noninvasively determines hepatic iron content (HIC). Concurrent hepatic steatosis introduces signal oscillations and confounds R2* quantification with standard monoexponential models. PURPOSE: To evaluate an autoregressive moving average (ARMA) model for accurate quantification of HIC in the presence of fat using biopsy as the reference...
February 13, 2019: Journal of Magnetic Resonance Imaging: JMRI
David M Higgins, Claire Keeble, Christoph Juli, Dana K Dawson, John C Waterton
BACKGROUND: Imaging biomarkers, such as the T1 relaxation time of the myocardium using MRI, can be valuable in cardiac medicine if they are properly validated. Consensus statements recommend that for myocardial T1 , each investigator should establish a reference range. PURPOSE: To describe a statistically valid method for determining and reporting the reference range in each center, which simultaneously minimizes the twin risks of undersampling, leading to a uselessly uncertain range, and oversampling, which exposes volunteers to unnecessary scanning and wastes resources...
February 12, 2019: Journal of Magnetic Resonance Imaging: JMRI
Daniel Polak, Stephen Cauley, Susie Y Huang, Maria Gabriela Longo, John Conklin, Berkin Bilgic, Ned Ohringer, Esther Raithel, Peter Bachert, Lawrence L Wald, Kawin Setsompop
BACKGROUND: Rapid volumetric imaging protocols could better utilize limited scanner resources. PURPOSE: To develop and validate an optimized 6-minute high-resolution volumetric brain MRI examination using Wave-CAIPI encoding. STUDY TYPE: Prospective. POPULATION/SUBJECTS: Ten healthy subjects and 20 patients with a variety of intracranial pathologies. FIELD STRENGTH/SEQUENCE: At 3 T, MPRAGE, T2 -weighted SPACE, SPACE FLAIR, and SWI were acquired at 9-fold acceleration using Wave-CAIPI and for comparison at 2-4-fold acceleration using conventional GRAPPA...
February 8, 2019: Journal of Magnetic Resonance Imaging: JMRI
Elisabeth Klupp, Barbara Cervantes, Sarah Schlaeger, Stephanie Inhuber, Florian Kreuzpointer, Ansgar Schwirtz, Alexander Rohrmeier, Michael Dieckmeyer, Dennis M Hedderich, Maximilian N Diefenbach, Friedemann Freitag, Ernst J Rummeny, Claus Zimmer, Jan S Kirschke, Dimitrios C Karampinos, Thomas Baum
BACKGROUND: The paraspinal muscles play an important role in the onset and progression of lower back pain. It would be of clinical interest to identify imaging biomarkers of the paraspinal musculature that are related to muscle function and strength. Diffusion tensor imaging (DTI) enables the microstructural examination of muscle tissue and its pathological changes. PURPOSE: To investigate associations of DTI parameters of the lumbar paraspinal muscles with isometric strength measurements in healthy volunteers...
February 5, 2019: Journal of Magnetic Resonance Imaging: JMRI
Teresa Gerhalter, Lena V Gast, Benjamin Marty, Jan Martin, Regina Trollmann, Stephanie Schüssler, Frank Roemer, Frederik B Laun, Michael Uder, Rolf Schröder, Pierre G Carlier, Armin M Nagel
BACKGROUND: Duchenne muscular dystrophy (DMD) is a hereditary neuromuscular disease leading to progressive muscle wasting. Since there is a need for MRI variables that serve as early sensitive indicators of response to treatment, several quantitative MRI methods have been suggested for disease monitoring. PURPOSE: To evaluate the potential of sodium (23 Na) and proton (1 H) MRI methods to assess early pathological changes in skeletal muscle of DMD. STUDY TYPE: Prospective clinical study...
February 4, 2019: Journal of Magnetic Resonance Imaging: JMRI
Kevin Bouaou, Ioannis Bargiotas, Thomas Dietenbeck, Emilie Bollache, Gilles Soulat, Damian Craiem, Sophia Houriez-Gombaud-Saintonge, Alain De Cesare, Umit Gencer, Alain Giron, Alban Redheuil, Emmanuel Messas, Didier Lucor, Elie Mousseaux, Nadjia Kachenoura
BACKGROUND: Aging-related arterial stiffness is associated with substantial changes in global and local arterial pressures. The subsequent early return of reflected pressure waves leads to an elevated left ventricular (LV) afterload and ultimately to a deleterious concentric LV remodeling. PURPOSE: To compute aortic time-resolved pressure fields of healthy subjects from 4D flow MRI and to define relevant pressure-based markers while investigating their relationship with age, LV remodeling, as well as tonometric augmentation index (AIx) and pulse wave velocity (PWV)...
February 4, 2019: Journal of Magnetic Resonance Imaging: JMRI
Judy Rizk, Heiner Latus, Nerejda Shehu, Naira Mkrtchyan, Judith Zimmermann, Stefan Martinoff, Peter Ewert, Anja Hennemuth, Heiko Stern, Christian Meierhofer
BACKGROUND: Alterations in wall shear stress (WSS) assessed using 4D flow MRI have been shown to play a role in various vascular pathologies, such as bicuspid aortic valve aortopathy. Most studies have focused on systolic WSS, whereas altered diastolic hemodynamics in regurgitant semilunar valvular lesions have not so far been well characterized. PURPOSE: To investigate diastolic WSS in aortic and pulmonary regurgitation. STUDY TYPE: Retrospective data analysis...
February 4, 2019: Journal of Magnetic Resonance Imaging: JMRI
Motoshi Fujimori, Koichi Murakami, Hiroyuki Sugimori, Yutong Lu, Kenneth Sutherland, Nozomi Oki, Takatoshi Aoki, Tamotsu Kamishima
BACKGROUND: Postcontrast-enhanced MRI is currently the reference standard for synovial proliferation in rheumatoid arthritis (RA). However, the technique is somewhat invasive due to the use of gadolinium contrast agents, which may cause severe adverse/side effects. Intravoxel incoherent motion (IVIM) simultaneously permits quantification of perfusion as well as diffusion using a single imaging scan. PURPOSE/HYPOTHESIS: To test the capability of IVIM MRI for noninvasive discrimination of synovial proliferation in hand arthritis...
January 31, 2019: Journal of Magnetic Resonance Imaging: JMRI
Benjamin M Mervak, Ersan Altun, Katrina A McGinty, W Brian Hyslop, Richard C Semelka, Lauren M Burke
There is a constantly evolving knowledgebase regarding the safety of MRI in pregnant patients, as well as the safety of gadolinium administration, given potential fetal risks. This review provides an overview of national and international recommendations for patient screening and safety by trimester, evaluates the most recent literature regarding administration of gadolinium in pregnant patients, and discusses technical requirements when imaging pregnant patients. A protocol for imaging pregnant patients is provided, and multiple common indications for MRI in pregnancy are discussed...
January 31, 2019: Journal of Magnetic Resonance Imaging: JMRI
Mark Wu, Satheesh Krishna, Rebecca E Thornhill, Trevor A Flood, Matthew D F McInnes, Nicola Schieda
BACKGROUND: The limitation of diagnosis of transition zone (TZ) prostate cancer (PCa) using subjective assessment of multiparametric (mp) MRI with PI-RADS v2 is related to overlapping features between cancers and stromal benign prostatic hyperplasia (BPH) nodules, particularly in small lesions. PURPOSE: To evaluate modeling of quantitative apparent diffusion coefficient (ADC), texture, and shape features using logistic regression (LR) and support vector machine (SVM) models for the diagnosis of transition zone PCa...
January 30, 2019: Journal of Magnetic Resonance Imaging: JMRI
Takeshi Fukuda, Kenneth Wengler, Ruben de Carvalho, Pattira Boonsri, Mark E Schweitzer
Although radiography continues to play a critical role in osseous tumor assessment, there have been remarkable advances in cross-sectional imaging. MRI has taken a lead in this assessment due to high tissue contrast and spatial resolution, which are well suited for bone lesion assessment. More recently, although somewhat lagging other organ systems, quantitative parameters have shown promising potential as biomarkers for osseous tumors. Among these sequences are chemical shift imaging (CSI), apparent diffusion coefficient (ADC), and intravoxel incoherent motion (IVIM) from diffusion-weighted imaging (DWI), quantitative dynamic contrast enhanced (DCE)-MRI, and magnetic resonance spectroscopy (MRS)...
January 30, 2019: Journal of Magnetic Resonance Imaging: JMRI
James W Goldfarb, Jason Craft, J Jane Cao
BACKGROUND: Water-fat separation is a postprocessing technique most commonly applied to multiple-gradient-echo magnetic resonance (MR) images to identify fat, provide images with fat suppression, and to measure fat tissue concentration. Recently, Numerous advancements have been reported. In contrast to early methods, the process of water-fat separation has become complicated due to multiparametric analytic models, optimization methods, and the absence of a unified framework for diverse source data...
January 30, 2019: Journal of Magnetic Resonance Imaging: JMRI
Yesenia Covarrubias, Kathryn J Fowler, Adrija Mamidipalli, Gavin Hamilton, Tanya Wolfson, Olof Dahlqvist Leinhard, Garth Jacobsen, Santiago Horgan, Jeffrey B Schwimmer, Scott B Reeder, Claude B Sirlin
BACKGROUND: Quantitative-chemical-shift-encoded (CSE)-MRI methods have been applied to the liver. The feasibility and potential utility CSE-MRI in monitoring changes in pancreatic proton density fat fraction (PDFF) have not yet been demonstrated. PURPOSE: To use quantitative CSE-MRI to estimate pancreatic fat changes during a weight-loss program in adults with severe obesity and nonalcoholic fatty liver disease (NAFLD). To explore the relationship of reduction in pancreatic PDFF with reductions in anthropometric indices...
January 30, 2019: Journal of Magnetic Resonance Imaging: JMRI
Roland Krug, Gabrielle B Joseph, Misung Han, Aaron Fields, Justin Cheung, Maya Mundada, Jeannie Bailey, Alice Rochette, Alexander Ballatori, Charles E McCulloch, Zachary McCormick, Conor O'Neill, Thomas M Link, Jeffrey Lotz
BACKGROUND: There is an interplay between the intervertebral disc (IVD) and the adjacent bone marrow that may play a role in the development of IVD degeneration and might influence chronic lower back pain (CLBP). PURPOSE: To apply novel quantitative MRI techniques to assess the relationship between vertebral bone marrow fat (BMF) and biochemical changes in the adjacent IVD. STUDY TYPE: Prospective. SUBJECTS: Forty-six subjects (26 female and 20 male) with a mean age of 47...
January 30, 2019: Journal of Magnetic Resonance Imaging: JMRI
Xiao-Min Xu, Yun Jiao, Tian-Yu Tang, Jian Zhang, Chun-Qiang Lu, Richard Salvi, Gao-Jun Teng
BACKGROUND: The thalamus is an integrative hub conveying sensory information between cortical areas and related to cognition. However, alterations of the thalamus following partial hearing deprivation remains unknown. PURPOSE: To investigate the modifications of the thalamus and its seven subdivisions in terms of structure, function, and perfusion in subjects with sensorineural hearing loss (SNHL), as well as their associations with SNHL-induced cognitive impairments...
January 29, 2019: Journal of Magnetic Resonance Imaging: JMRI
Chengcheng Zhu, Joseph R Leach, Bing Tian, Lizhen Cao, Zhaoying Wen, Yan Wang, Xinke Liu, Qi Liu, Jianping Lu, David Saloner, Michael D Hope
BACKGROUND: Intraluminal thrombus (ILT) signal intensity on MRI has been studied as a potential marker of abdominal aortic aneurysm (AAA) progression. PURPOSE: 1) To characterize the relationship between ILT signal intensity and AAA diameter; 2) to evaluate ILT change over time; and 3) to assess the relationship between ILT features and AAA growth. STUDY TYPE: Prospective. SUBJECTS: Eighty AAA patients were imaged, and a subset (n = 41) were followed with repeated MRI for 16 ± 9 months...
January 29, 2019: Journal of Magnetic Resonance Imaging: JMRI
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