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Journal of Magnetic Resonance Imaging: JMRI

Yoshikazu Tanaka, Go Nakai, Kenichiro Yamamura, Kazuhiro Yamamoto, Yoshifumi Narumi, Masahide Ohmichi
BACKGROUND: Endometrioma generally shows higher intracystic signal intensity (SI) than mucinous cystadenoma (MCA) on T1 -weighted imaging (T1 WI). Nonendometrioma-associated malignant ovarian epithelial tumors (nonendometrioma group) often show higher intracystic SI than benign tumors on T1 WI, while the converse is true for endometrioma and endometrioma-associated malignant tumors (endometrioma group). However, it is sometimes difficult to differentiate between hemorrhagic and mucinous content based on SI on T1 WI...
September 21, 2018: Journal of Magnetic Resonance Imaging: JMRI
Joon Yul Choi, In Hye Jeong, Se-Hong Oh, Chang-Hyun Oh, Na Young Park, Ho Jin Kim, Jongho Lee
BACKGROUND: In multiple sclerosis (MS), not only lesions but also normal MRI-appearing white matter (NAWM) may undergo demyelination. PURPOSE: To demonstrate the detection of NAWM demyelination using direct visualization of short transverse relaxation time component myelin water imaging (ViSTa-MWI) and to compare the results with those of conventional gradient echo and spin echo (GRASE)-MWI. STUDY TYPE: Control/cohort. POPULATION: Twenty-five MS patients and 18 healthy controls (HC)...
September 21, 2018: Journal of Magnetic Resonance Imaging: JMRI
Sung Eun Song, Kyu Ran Cho, Bo Kyoung Seo, Ok Hee Woo, Kyong Hwa Park, Yo Han Son, Robert Grimm
BACKGROUND: As both intravoxel incoherent motion (IVIM) modeling and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) provide perfusion parameters, IVIM-derived perfusion parameters might be expected to correlate with the kinetic features from DCE-MRI. PURPOSE: To investigate the association between IVIM parameters and prognostic factors and to evaluate the correlation between IVIM parameters and kinetic features in invasive breast cancer patients using computer-aided diagnosis (CAD)...
September 20, 2018: Journal of Magnetic Resonance Imaging: JMRI
Qingxia Wu, Dapeng Shi, Shewei Dou, Ligang Shi, Mingbo Liu, Li Dong, Xiaowan Chang, Meiyun Wang
BACKGROUND: Robust parameters to evaluate pathological aggressiveness are needed to provide individualized therapy for cervical cancer patients. PURPOSE: To investigate the radiomics analysis of multiparametric MRI to evaluate tumor grade, lymphovascular space invasion (LVSI), and lymph node (LN) metastasis of cervical squamous cell carcinoma (CSCC). STUDY TYPE: Retrospective. SUBJECTS: Fifty-six patients with histopathologically confirmed CSCC...
September 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
Tim Luo, Olayinka Oladosu, Khalil S Rawji, Peng Zhai, Glen Pridham, Shahnewaz Hossain, Yunyan Zhang
BACKGROUND: Changes in myelin integrity are associated with the pathophysiology of many neurological diseases, including multiple sclerosis. However, noninvasive measurement of myelin injury and repair remains challenging. Advanced MRI techniques including diffusion tensor imaging (DTI), neurite orientation dispersion and density index (NODDI), and texture analysis have shown promise in quantifying subtle abnormalities in white matter structure. PURPOSE: To determine whether and how these advanced imaging methods help understand remyelination changes after demyelination using a mouse model...
September 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
Tong Chen, Mengjuan Li, Yuefan Gu, Yueyue Zhang, Shuo Yang, Chaogang Wei, Jiangfen Wu, Xin Li, Wenlu Zhao, Junkang Shen
BACKGROUND: Multiparametric MRI (mp-MRI) combined with machine-aided approaches have shown high accuracy and sensitivity in prostate cancer (PCa) diagnosis. However, radiomics-based analysis has not been thoroughly compared with Prostate Imaging and Reporting and Data System version 2 (PI-RADS v2) scores. PURPOSE: To develop and validate a radiomics-based model for differentiating PCa and assessing its aggressiveness compared with PI-RADS v2 scores. STUDY TYPE: Retrospective...
September 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
Weiguo Zhang, Chelsea J Stephens, Jon D Blumenfeld, Ashkan Heshmatzadeh Behzadi, Stephanie Donahue, Warren O Bobb, Jeffrey H Newhouse, Hanna Rennert, Yize Zhao, Martin R Prince
BACKGROUND: Autosomal dominant polycystic kidney disease (ADPKD) can involve prostate and seminal vesicles but the potential interrelationship of these findings and associations with PKD gene mutation locus and type is unknown. PURPOSE: To determine the interrelationship of seminal megavesicles (seminal vesicles with lumen diameter > 10mm) and prostatic cysts in ADPKD and to determine whether there are associations with PKD gene mutations. STUDY TYPE: Retrospective, case control...
September 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
Masoud Edalati, Mary K Hastings, Christopher J Sorensen, Mohamed Zayed, Michael J Mueller, Charles F Hildebolt, Jie Zheng
BACKGROUND: Diffusion tensor imaging (DTI) has been used to characterize calf skeletal muscle architecture. PURPOSE: To assess the diffusional properties of the calf muscles of subjects with and without diabetes, at rest and during isometric plantarflexion exercise. STUDY TYPE: Prospective. SUBJECTS: Twenty-six subjects in two groups: 13 healthy and 13 subjects with type 2 diabetes (DM); each group consisted of seven females and six males...
September 19, 2018: Journal of Magnetic Resonance Imaging: JMRI
Christian B van der Pol, Andrew Chung, Christopher Lim, Niket Gandhi, Wendy Tu, Matthew D F McInnes, Nicola Schieda
While many institutions perform MRI during the work-up of urinary bladder cancer, others use MRI rarely if at all, possibly due to a variation in the reported staging accuracy and unfamiliarity with the potential benefits of performing MRI. Through increased application of functional imaging techniques including diffusion-weighted imaging (DWI) and dynamic contrast-enhanced (DCE) imaging, there has been a resurgence of interest regarding evaluation of bladder cancer with MRI. Several recent meta-analyses have shown that MRI is accurate at differentiating between ≤T1 and T2 disease (with pooled sensitivity/specificity of ∼90/80%) and differentiating between T2 and ≥T3 disease...
September 17, 2018: Journal of Magnetic Resonance Imaging: JMRI
Jakob Weiss, Rüdiger Hoffmann, Hansjoerg Rempp, David-Emanuel Keβler, Philippe L Pereira, Konstantin Nikolaou, Stephan Clasen
BACKGROUND: Percutaneous tumor ablation is commonly performed using computed tomography (CT) or ultrasound (US) guidance, although reliable visualization of the target tumor may be challenging. MRI guidance provides more reliable visualization of target tumors and allows for real-time imaging and multiplanar capabilities, making it the modality of choice, in particular if lesions are small. PURPOSE: To investigate the feasibility, technical success, and safety of percutaneous MR-guided ablation (RFA n = 27 / MWA n = 16) of small (≤12 mm) hepatic malignancies...
September 17, 2018: Journal of Magnetic Resonance Imaging: JMRI
Xinzeng Wang, Joshua S Greer, Ivan E Dimitrov, Parham Pezeshk, Avneesh Chhabra, Ananth J Madhuranthakam
BACKGROUND: The 3D short tau inversion recovery (STIR) sequence is routinely used in clinical MRI to achieve robust fat suppression. However, the performance of the commonly used adiabatic inversion pulse, hyperbolic secant (HS), is compromised in challenging areas with increased B0 and B1 inhomogeneities, such as brachial plexus at 3T. PURPOSE: To demonstrate the frequency offset corrected inversion (FOCI) pulse as an efficient fat suppression STIR pulse with increased robustness to B0 and B1 inhomogeneities at 3T, compared to the HS pulse...
September 15, 2018: Journal of Magnetic Resonance Imaging: JMRI
Amirah Khalid, Einly Lim, Bee Ting Chan, Yang Faridah Abdul Aziz, Kok Han Chee, Hwa Jen Yap, Yih Miin Liew
BACKGROUND: Existing clinical diagnostic and assessment methods could be improved to facilitate early detection and treatment of cardiac dysfunction associated with acute myocardial infarction (AMI) to reduce morbidity and mortality. PURPOSE: To develop 3D personalized left ventricular (LV) models and thickening assessment framework for assessing regional wall thickening dysfunction and dyssynchrony in AMI patients. STUDY TYPE: Retrospective study, diagnostic accuracy...
September 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
Taehoon Shin, Rajiv G Menon, Rahul B Thomas, Armando U Cavallo, Rajabraka Sarkar, Robert S Crawford, Sanjay Rajagopalan
BACKGROUND: Safe and accurate imaging of the peripheral arterial system is important for diagnosis and treatment planning of patients with peripheral artery disease (PAD). PURPOSE: To evaluate image quality and diagnostic performance of unenhanced magnetic resonance angiography (MRA) based on velocity-selective (VS) magnetization preparation (termed VS-MRA). STUDY TYPE: Prospective. POPULATION: Thirty-one symptomatic PAD patients underwent VS-MRA...
September 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
Michael J Knight, Alfie Wearn, Elizabeth Coulthard, Risto A Kauppinen
BACKGROUND: Quantitative T2 and diffusion MRI indices inform about tissue state and microstructure, both of which may be affected by pathology before tissue atrophy. PURPOSE: To evaluate the capability of both volumetric and quantitative MRI (qMRI) of the hippocampus and entorhinal cortex (EC) for classification of amnestic mild cognitive impairment (aMCI) and Alzheimer's disease dementia (ADD). STUDY TYPE: Retrospective cross-sectional study...
September 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
Fatma Beyazal Celiker, Levent Tumkaya, Tolga Mercantepe, Mehmet Beyazal, Arzu Turan, Hatice Beyazal Polat, Zehra Topal Suzan, Mehmet Fatih Inecikli, Kerimali Akyildiz, Adnan Yilmaz
BACKGROUND: Gadolinium-based contrast agents are complex chelates to provide contrast in NRI. However, recent studies have highlighted the deposition of free Gd+3 ion in various tissues. PURPOSE: To evaluate the histopathological and immunohistochemical changes on rat kidney tissue following both macrocyclic (gadoteric acid) and linear (gadodiamide) agents under the hypothesis that gadolinium-based contrast agents (GBCA) lead to toxic, free Gd+3 accumulation in tissues...
September 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
James G Pipe
No abstract text is available yet for this article.
September 12, 2018: Journal of Magnetic Resonance Imaging: JMRI
Gaël Dournes, Joseph Yazbek, Wadie Benhassen, Ilyes Benlala, Elodie Blanchard, Marie-Elise Truchetet, Julie Macey, Patrick Berger, François Laurent
BACKGROUND: Ultrashort echo time (UTE) has been shown to improve lung MRI quality in three dimensions. The evaluation of 3D-UTE stack-of-spirals VIBE (3D-USV) sequence for parenchymal diseases and a comparison of performance with that of a spherical mode of acquisition is needed. PURPOSE: To assess MRI quality using a prototypical 3D-USV sequence and to compare performance with that of a spherical acquisition using Pointwise Encoding Time Reduction with Radial Acquisition (PETRA)...
September 11, 2018: Journal of Magnetic Resonance Imaging: JMRI
Nico Papinutto, Roland G Henry
BACKGROUND: In vivo quantification of spinal cord atrophy in neurological diseases using MRI has attracted increasing attention. PURPOSE: To compare across different platforms the most promising imaging techniques to assess human spinal cord atrophy. STUDY TYPE: Test/retest multiscanner study. SUBJECTS: Twelve healthy volunteers. FIELD STRENGTH/SEQUENCE: Three different 3T scanner platforms (Siemens, Philips, and GE) / optimized phase sensitive inversion recovery (PSIR), T1 -weighted (T1 -w), and T2 *-weighted (T2 *-w) protocols...
September 9, 2018: Journal of Magnetic Resonance Imaging: JMRI
Hersh Chandarana, Hesheng Wang, R H N Tijssen, Indra J Das
Advances in multimodality imaging, providing accurate information of the irradiated target volume and the adjacent critical structures or organs at risk (OAR), has made significant improvements in delivery of the external beam radiation dose. Radiation therapy conventionally has used computed tomography (CT) imaging for treatment planning and dose delivery. However, magnetic resonance imaging (MRI) provides unique advantages: added contrast information that can improve segmentation of the areas of interest, motion information that can help to better target and deliver radiation therapy, and posttreatment outcome analysis to better understand the biologic effect of radiation...
September 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
Doris Leithner, Linda Moy, Elizabeth A Morris, Maria A Marino, Thomas H Helbich, Katja Pinker
MRI of the breast is the most sensitive test for breast cancer detection and outperforms conventional imaging with mammography, digital breast tomosynthesis, or ultrasound. However, the long scan time and relatively high costs limit its widespread use. Hence, it is currently only routinely implemented in the screening of women at an increased risk of breast cancer. To overcome these limitations, abbreviated dynamic contrast-enhanced (DCE)-MRI protocols have been introduced that substantially shorten image acquisition and interpretation time while maintaining a high diagnostic accuracy...
September 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
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