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Journal of Magnetic Resonance Imaging: JMRI

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https://www.readbyqxmd.com/read/28653477/radiomic-analysis-of-soft-tissues-sarcomas-can-distinguish-intermediate-from-high-grade-lesions
#1
Valentina D A Corino, Eros Montin, Antonella Messina, Paolo G Casali, Alessandro Gronchi, Alfonso Marchianò, Luca T Mainardi
PURPOSE: To assess the feasibility of grading soft tissue sarcomas (STSs) using MRI features (radiomics). MATERIALS AND METHODS: MRI (echo planar SE, 1.5T) from 19 patients with STSs and a known histological grading, were retrospectively analyzed. The apparent diffusion coefficient (ADC) maps, obtained by diffusion-weighted imaging acquisitions, were analyzed through 65 radiomic features, intensity-based (first order statistics, FOS) and texture (gray level co-occurrence matrix, GLCM; and gray level run length matrix, GLRLM) features...
June 27, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28650110/reproducibility-of-in-vivo-magnetic-resonance-imaging-t1-rho-and-t2-relaxation-time-measurements-of-hip-cartilage-at-3-0t-in-healthy-volunteers
#2
Angeline Nemeth, Lucy Di Marco, Florent Boutitie, Michael Sdika, Denis Grenier, Muriel Rabilloud, Olivier Beuf, Jean-Baptiste Pialat
PURPOSE: To assess the T1 ρ and T2 values in the hip cartilage of healthy volunteers and to evaluate the reproducibility of these measurements. MATERIALS AND METHODS: The right hip joint of 30 asymptomatic volunteers was explored with 3T magnetic resonance imaging (MRI). Quantitative 3D T1 ρ- and T2 -maps sequences were repeated twice with a 30-minute delay (immediate reproducibility). The same protocol was repeated 14 days later (short-term reproducibility). Immediate and short-term reproducibility were estimated using coefficients of variation and correlation concordance coefficients (CCC)...
June 26, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28646614/does-breast-mri-background-parenchymal-enhancement-indicate-metabolic-activity-qualitative-and-3d-quantitative-computer-imaging-analysis
#3
Eralda Mema, Victoria L Mango, Xiaotao Guo, Jenika Karcich, Randy Yeh, Ralph T Wynn, Binsheng Zhao, Richard S Ha
PURPOSE: To investigate whether the degree of breast magnetic resonance imaging (MRI) background parenchymal enhancement (BPE) is associated with the amount of breast metabolic activity measured by breast parenchymal uptake (BPU) of 18F-FDG on positron emission tomography / computed tomography (PET/CT). MATERIALS AND METHODS: An Institutional Review Board (IRB)-approved retrospective study was performed. Of 327 patients who underwent preoperative breast MRI from 1/1/12 to 12/31/15, 73 patients had 18F-FDG PET/CT evaluation performed within 1 week of breast MRI and no suspicious findings in the contralateral breast...
June 24, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28646608/fluid-filling-of-the-digestive-tract-for-improved-proton-resonance-frequency-shift-based-mr-thermometry-in-the-pancreas
#4
Cyril J Ferrer, Lambertus W Bartels, Marijn van Stralen, Baudouin Denis de Senneville, Chrit T W Moonen, Clemens Bos
PURPOSE: To demonstrate that fluid filling of the digestive tract improves the performance of respiratory motion-compensated proton resonance frequency shift (PRFS)-based magnetic resonance (MR) thermometry in the pancreas. MATERIALS AND METHODS: In seven volunteers (without heating), we evaluated PRFS thermometry in the pancreas with and without filling of the surrounding digestive tract. All data acquisition was performed at 1.5T, then all datasets were analyzed and compared with three different PRFS respiratory motion-compensated thermometry methods: gating, multibaseline, and referenceless...
June 24, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640545/magnetic-resonance-imaging-of-the-brain-and-spine-5-th-edition
#5
Unni Udayasankar
No abstract text is available yet for this article.
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640538/whole-lesion-histogram-analysis-of-the-apparent-diffusion-coefficient-evaluation-of-the-correlation-with-subtypes-of-mucinous-breast-carcinoma
#6
Yuan Guo, Qing-Cong Kong, Ye-Qing Zhu, Zhen-Zhen Liu, Ling-Rong Peng, Wen-Jie Tang, Rui-Meng Yang, Jia-Jun Xie, Chun-Ling Liu
PURPOSE: To evaluate the utility of the whole-lesion histogram apparent diffusion coefficient (ADC) for characterizing the heterogeneity of mucinous breast carcinoma (MBC) and to determine which ADC metrics may help to best differentiate subtypes of MBC. MATERIALS AND METHODS: This retrospective study involved 52 MBC patients, including 37 pure MBC (PMBC) and 15 mixed MBC (MMBC). The PMBC patients were subtyped into PMBC-A (20 cases) and PMBC-B (17 cases) groups...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640531/apparent-diffusion-coefficient-in-estrogen-receptor-positive-and-lymph-node-negative-invasive-breast-cancers-at-3-0t-dw-mri-a-potential-predictor-for-an-oncotype-dx-test-recurrence-score
#7
Sunitha B Thakur, Manuela Durando, Soledad Milans, Gene Y Cho, Lucas Gennaro, Elizabeth J Sutton, Dilip Giri, Elizabeth A Morris
PURPOSE: To measure the apparent diffusion coefficient (ADC) values in estrogen receptor-positive (ER+) and axillary lymph node-negative (LN-) invasive breast cancer and investigate the correlation of ADC with Oncotype Dx test recurrence scores (ODxRS). MATERIALS AND METHODS: This was a Health Insurance Portability and Accountability Act (HIPAA)-compliant single-site retrospective study. Patients underwent preoperative 3.0T MRI scans with additional diffusion-weighted imaging sequential scans (b = 0, 600 and b = 0, 1000 s/mm(2) ) from January 2011 to 2013...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640521/pet-mri-for-evaluating-subclinical-inflammation-of-ulcerative-colitis
#8
I-Lun Shih, Shu-Chen Wei, Rouh-Fang Yen, Chin-Chen Chang, Chi-Lun Ko, Been-Ren Lin, Chia-Tung Shun, Kao-Lang Liu, Jau-Min Wong, Yeun-Chung Chang
PURPOSE: To explore the utility of integrated positron emission tomography (PET) / magnetic resonance imaging (MRI) for evaluating subclinical inflammation in patients with ulcerative colitis (UC). MATERIALS AND METHODS: This prospective study was approved by the Institutional Review Board and informed consent was obtained. Between November 2015 and April 2016, 19 consecutive patients with UC in clinical remission were enrolled. These patients underwent 18F-fluorodeoxyglucose PET/MRI (3T) and colonoscopy...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640484/reporting-of-imaging-diagnostic-accuracy-studies-with-focus-on-mri-subgroup-adherence-to-stard-2015
#9
Patrick Jiho Hong, Daniel A Korevaar, Trevor A McGrath, Hedyeh Ziai, Robert Frank, Mostafa Alabousi, Patrick M M Bossuyt, Matthew D F McInnes
PURPOSE: To evaluate adherence of diagnostic accuracy studies in imaging journals to the STAndards for Reporting of Diagnostic accuracy studies (STARD) 2015. The secondary objective was to identify differences in reporting for magnetic resonance imaging (MRI) studies. MATERIALS AND METHODS: MEDLINE was searched for diagnostic accuracy studies published in imaging journals in 2016. Studies were evaluated for adherence to STARD 2015 (30 items, including expanded imaging specific subitems)...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640476/histogram-analyses-of-diffusion-kurtosis-indices-and-apparent-diffusion-coefficient-in-assessing-liver-regeneration-after-alpps-and-a-comparative-study-with-portal-vein-ligation
#10
Ruo-Fan Sheng, He-Qing Wang, Kai-Pu Jin, Li Yang, Hao Liu, Yuan Ji, Cai-Xia Fu, Meng-Su Zeng
PURPOSE: To investigate the value of diffusion kurtosis imaging (DKI) histogram analysis in assessing liver regeneration and the microstructure basis after associating liver partition and portal vein ligation for staged hepatectomy (ALPPS), in comparison with portal vein ligation (PVL). MATERIALS AND METHODS: Thirty rats were divided into the ALPPS, PVL, and control groups. Histograms of DKI using a 3T magnetic resonance imaging (MRI) scanner were performed for corrected apparent diffusion (D), kurtosis (K), and apparent diffusion coefficient (ADC)...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28640394/in-scan-and-scan-rescan-assessment-of-lv-in-and-outflow-volumes-by-4d-flow-mri-versus-2d-planimetry
#11
Vivian P Kamphuis, Roel L F van der Palen, Patrick J H de Koning, Mohammed S M Elbaz, Rob J van der Geest, Albert de Roos, Arno A W Roest, Jos J M Westenberg
PURPOSE: To evaluate the in-scan and scan-rescan consistency of left ventricular (LV) in- and outflow assessment from 1) 2D planimetry; 2) 4D flow magnetic resonance imaging (MRI) with retrospective valve tracking, and 3) 4D flow MRI with particle tracing. MATERIALS AND METHODS: Ten healthy volunteers (age 27 ± 3 years) underwent multislice cine short-axis planimetry and whole-heart 4D flow MRI on a 3T MRI scanner twice with repositioning between the scans...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28639300/multiparametric-mri-of-the-breast-a-review
#12
REVIEW
Maria Adele Marino, Thomas Helbich, Pascal Baltzer, Katja Pinker-Domenig
During their development, cancers acquire several functional capabilities, which are defined as the hallmarks of cancer. For a deeper understanding of the hallmarks of cancer, and, consequently, improved personalized patient care, diagnostic tests must be multilayered and complex to identify the relevant underlying processes of cancer development and progression. In this context, magnetic resonance imaging (MRI) has emerged as an exceptionally powerful, versatile, and precise imaging technique. MRI of the breast is an essential tool in breast imaging, with multiple indications...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28639264/magnetic-resonance-spin-spin-relaxation-time-estimation-in-a-rat-model-of-fatty-liver-disease
#13
Sami Alghamdi, Benjamin Sinclair, Gary Cowin, Ian Brereton, Yasvir A Tesiram
PURPOSE: To compare mono- and bi-exponential relaxation model equations to discriminate between normal and fatty liver disease. MATERIALS AND METHODS: Six rats on a choline deficient amino acid modified (CDAA) diet and six on normal chow were studied. Multiple spin echo images with increasing echo times (TEs) were collected at 9.4T. Pixel-wise T2 maps were generated using mono-exponential decay function to calculate T2M , and a bi-exponential to calculate, short T2 component (T2S ), long T2 component (T2L ), and fractions of these components (ρS , ρL ), respectively...
June 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28594113/self-gated-4d-mri-of-the-liver-initial-clinical-results-of-continuous-multiphase-imaging-of-hepatic-enhancement
#14
Jakob Weiss, Mike Notohamiprodjo, Petros Martirosian, Jana Taron, Marcel D Nickel, Manuel Kolb, Fabian Bamberg, Konstantin Nikolaou, Ahmed E Othman
PURPOSE: To evaluate the feasibility of a self-gated free-breathing volume-interpolated breath-hold examination (VIBE) sequence using compressed sensing (CS) for contrast-enhanced multiphase liver MRI. MATERIALS AND METHODS: We identified 23 patients who underwent multiphase gadobutrol-enhanced liver magnetic resonance imaging (MRI) using 1) a prototype free-breathing VIBE sequence with respiratory self-gating and CS (VIBECS ), and 2) a standard breath-hold VIBE (VIBESTD ) on the same 1...
June 8, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28591490/region-specific-atrophy-of-precentral-gyrus-in-patients-with-amyotrophic-lateral-sclerosis
#15
Yuanyuan Qin, Shun Zhang, Rifeng Jiang, Fei Gao, Xiaoying Tang, Wenzhen Zhu
PURPOSE: To assess the region-specific atrophy of precentral gyrus (PrCG) and its correlation to clinical function score in amyotrophic lateral sclerosis (ALS). MATERIALS AND METHODS: Twenty-eight patients with sporadic ALS and 28 healthy controls underwent high-resolution 3D T1-BRAVO magnetic resonance imaging at 3T. The bilateral PrCG segmentations were automatically obtained from a validated segmentation pipeline based on diffeomorphic multi-atlas likelihood fusion...
June 7, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28589549/quantitative-analysis-of-hepatocellular-adenoma-and-focal-nodular-hyperplasia-in-the-hepatobiliary-phase-external-validation-of-llcer-method-using-gadobenate-dimeglumine-as-contrast-agent
#16
LETTER
Maarten G Thomeer, Bibiche Gest, Hermen van Beek, Marianne De Vries, Roy Dwarkasing, Anne J Klompenhouwer, Robert A De Man, Jan N IJzermans, Loes Braun
No abstract text is available yet for this article.
June 6, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28580758/nuclei-specific-deposits-of-iron-and-calcium-in-the-rat-thalamus-after-status-epilepticus-revealed-with-quantitative-susceptibility-mapping-qsm
#17
Manisha Aggarwal, Xu Li, Olli Gröhn, Alejandra Sierra
PURPOSE: To investigate pathological changes in the rat brain after pilocarpine-induced status epilepticus using quantitative susceptibility mapping (QSM). MATERIALS AND METHODS: 3D multiecho gradient-echo (GRE) data were acquired from ex vivo brains of pilocarpine-injected and age-matched control rats at 11.7T. Maps of R2* and quantitative susceptibility were calculated from the acquired 3D GRE magnitude and phase data, respectively. QSM and R2* maps were compared with Perls' (iron) and Alizarin-red-S (calcium) stainings in the same brains to investigate the pathophysiological basis of susceptibility contrast...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28580722/response-to-quantitative-analysis-of-hepatocellular-adenoma-and-focal-nodular-hyperplasia-in-the-hepatobiliary-phase-external-validation-of-llcer-method-using-gadobenate-dimeglumine-as-contrast-agent
#18
LETTER
Marion Roux, Frederic Pigneur, Alain Luciani
No abstract text is available yet for this article.
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28580706/mr-techniques-for-guiding-high-intensity-focused-ultrasound-hifu-treatments
#19
REVIEW
Kagayaki Kuroda
To make full use of the ability of magnetic resonance (MR) to guide high-intensity focused ultrasound (HIFU) treatment, effort has been made to improve techniques for thermometry, motion tracking, and sound beam visualization. For monitoring rapid temperature elevation with proton resonance frequency (PRF) shift, data acquisition and processing can be accelerated with parallel imaging and/or sparse sampling in conjunction with appropriate signal processing methods. Thermometry should be robust against tissue motion, motion-induced magnetic field variation, and susceptibility change...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28580659/ex-vivo-mri-evaluation-of-prostate-cancer-localization-and-margin-status-prediction-of-prostate-cancer-in-fresh-radical-prostatectomy-specimens
#20
Jan Heidkamp, Martijn Hoogenboom, Iringo E Kovacs, Andor Veltien, Arie Maat, J P Michiel Sedelaar, Christina A Hulsbergen-van de Kaa, Jurgen J Fütterer
PURPOSE: To investigate the ability of high field ex vivo magnetic resonance imaging (MRI) to localize prostate cancer (PCa) and to predict the margin status in fresh radical prostatectomy (RP) specimens using histology as the reference standard. MATERIALS AND METHODS: This Institutional Review Board (IRB)-approved study had written informed consent. Patients with biopsy-proved PCa and a diagnostic multiparametric 3T MRI examination of the prostate prior to undergoing RP were prospectively included...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
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