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Journal of Magnetic Resonance Imaging: JMRI

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https://www.readbyqxmd.com/read/29897656/effects-of-age-gender-and-risk-factors-for-heart-failure-on-native-myocardial-t-1-and-extracellular-volume-fraction-using-the-sasha-sequence-at-1-5t
#1
Joseph J Pagano, Kelvin Chow, D Ian Paterson, Yoko Mikami, Anna Schmidt, Andrew Howarth, James White, Matthias G Friedrich, Gavin Y Oudit, Justin Ezekowitz, Jason Dyck, Richard B Thompson
BACKGROUND: Understanding cardiac MR T1 mapping values might require examination of the effects of age, gender, and heart failure risk factors. PURPOSE/HYPOTHESIS: To evaluate the effects of gender, age, and presence of heart failure risk factors on myocardial native T1 and extracellular volume fraction (ECV). STUDY TYPE: Retrospective, cross-sectional, observational study. POPULATION: Secondary analysis of cardiac MR data, separated by gender and health status, based on the presence of at least one heart failure risk factor...
June 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29897651/rf-coils-a-practical-guide-for-nonphysicists
#2
REVIEW
Bernhard Gruber, Martijn Froeling, Tim Leiner, Dennis W J Klomp
Radiofrequency (RF) coils are an essential MRI hardware component. They directly impact the spatial and temporal resolution, sensitivity, and uniformity in MRI. Advances in RF hardware have resulted in a variety of designs optimized for specific clinical applications. RF coils are the "antennas" of the MRI system and have two functions: first, to excite the magnetization by broadcasting the RF power (Tx-Coil) and second to receive the signal from the excited spins (Rx-Coil). Transmit RF Coils emit magnetic field pulses ( B1+) to rotate the net magnetization away from its alignment with the main magnetic field (B0 ), resulting in a transverse precessing magnetization...
June 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29897645/iron-deposition-quantification-applications-in-the-brain-and-liver
#3
Fuhua Yan, Naying He, Huimin Lin, Ruokun Li
Iron has long been implicated in many neurological and other organ diseases. It is known that over and above the normal increases in iron with age, in certain diseases there is an excessive iron accumulation in the brain and liver. MRI is a noninvasive means by which to image the various structures in the brain in three dimensions and quantify iron over the volume of the object of interest. The quantification of iron can provide information about the severity of iron-related diseases as well as quantify changes in iron for patient follow-up and treatment monitoring...
June 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29897641/magnetic-resonance-cold-pressor-test-to-investigate-potential-endothelial-dysfunction-in-patients-suffering-from-type-1-diabetes
#4
Andreas M Weng, Stefan Wilimsky, Gwendolyn Bender, Stefanie Hahner, Herbert Köstler, Christian O Ritter
BACKGROUND: In its course, diabetes impairs microvascular function through endothelial dysfunction. As the response of myocardial perfusion to sympathetic stimulation through cold is modulated by endothelium-related factors, an incipient endothelial dysfunction might be observed noninvasively by investigation of myocardial perfusion with a cold pressor test (CPT). This approach has been used in clinical MRI previously. PURPOSE: To assess endothelial function of patients suffering from type 1 diabetes by MR CPT...
June 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29761624/quantification-of-89-zr-iron-oxide-nanoparticle-biodistribution-using-pet-mr-and-ultrashort-te-sequences
#5
LETTER
Caroline D Jordan, Misung Han, Sravani Kondapavulur, Denis Beckford Vera, Kiel D Neumann, Teri Moore, Carol Stillson, Roland Krug, Spencer Behr, Youngho Seo, Henry F VanBrocklin, Peder E Z Larson, Mark Wilson, Alastair J Martin, Steven W Hetts
No abstract text is available yet for this article.
May 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29761595/radiomics-analysis-of-apparent-diffusion-coefficient-in-cervical-cancer-a-preliminary-study-on-histological-grade-evaluation
#6
Ying Liu, Yuwei Zhang, Runfen Cheng, Shichang Liu, Fangyuan Qu, Xiaoyu Yin, Qin Wang, Bohan Xiao, Zhaoxiang Ye
BACKGROUND: The role of apparent diffusion coefficient (ADC)-based radiomics features in evaluating histopathological grade of cervical cancer is unresolved. PURPOSE: To determine if there is a difference between radiomics features derived from center-slice 2D versus whole-tumor volumetric 3D for ADC measurements in patients with cervical cancer regarding tumor histopathological grade, and systematically assess the impact of the b value on radiomics analysis in ADC quantifications...
May 14, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29756310/folate-receptor-targeted-19-f-mr-molecular-imaging-and-proliferation-evaluation-of-lung-cancer
#7
Xiuan Xu, Yuling Yan, Fang Liu, Lina Wu, Mengping Shao, Kai Wang, Xilin Sun, Yingbo Li, Ernest Sanyare Warmann Beinpuo, Baozhong Shen
BACKGROUND: Folate receptors (FRs) hold great potential as important diagnostic and prognostic biological marker for cancer. PURPOSE: To assess the targeted capability of the FR-targeted perfluorocarbon (PFC) nanoparticles and to assess in vivo the relationship between FR expression and tumor proliferation with fluorine-19 (19 F) MR molecular imaging. STUDY TYPE: Prospective animal cancer model. ANIMAL MODEL: H460 (n = 14) and A549 (n = 14) nude mice subcutaneous tumor models...
May 13, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29746715/quantitative-susceptibility-map-analysis-in-preterm-neonates-with-germinal-matrix-intraventricular-hemorrhage
#8
Domenico Tortora, Mariasavina Severino, Jan Sedlacik, Benedetta Toselli, Mariya Malova, Alessandro Parodi, Giovanni Morana, Marco Massimo Fato, Luca Antonio Ramenghi, Andrea Rossi
BACKGROUND: Germinal matrix-intraventricular hemorrhage (GMH-IVH) is a common form of intracranial hemorrhage occurring in preterm neonates that may affect normal brain development. Although the primary lesion is easily identified on MRI by the presence of blood products, its exact extent may not be recognizable with conventional sequences. Quantitative susceptibility mapping (QSM) quantify the spatial distribution of magnetic susceptibility within biological tissues, including blood degradation products...
May 10, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29741818/phase-contrast-mri-measurements-of-net-cerebrospinal-fluid-flow-through-the-cerebral-aqueduct-are-confounded-by-respiration
#9
Jolanda M Spijkerman, Lennart J Geurts, Jeroen C W Siero, Jeroen Hendrikse, Peter R Luijten, Jaco J M Zwanenburg
BACKGROUND: Net cerebrospinal fluid (CSF) flow through the cerebral aqueduct may serve as a marker of CSF production in the lateral ventricles, and changes that occur with aging and in disease. PURPOSE: To investigate the confounding influence of the respiratory cycle on net CSF flow and stroke volume measurements. STUDY TYPE: Cross-sectional study. SUBJECTS: Twelve young, healthy subjects (seven male, age range 19-39 years, average age 28...
May 9, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29741808/intravoxel-incoherent-motion-ivim-imaging-in-human-achilles-tendon
#10
Kenneth Wengler, Takeshi Fukuda, Dharmesh Tank, Mingqian Huang, Elaine S Gould, Mark E Schweitzer, Xiang He
BACKGROUND: Limited microcirculation has been implicated in Achilles tendinopathy and may affect healing and disease progression. Existing invasive and noninvasive approaches to evaluate tendon microcirculation lack sensitivity and spatial coverage. PURPOSE: To develop a novel Achilles tendon intravoxel incoherent motion (IVIM) MRI protocol to overcome the limitations from low tendon T2 /T2 * value and low intratendinous blood volume and blood velocity to evaluate tendon microcirculation...
May 9, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29740903/utility-of-intravoxel-incoherent-motion-mri-derived-parameters-for-prediction-of-aggressiveness-in-urothelial-bladder-carcinoma
#11
Miaomiao Zhang, Yan Chen, Xinying Cong, Xinming Zhao
BACKGROUND: Preoperative accurate judgment of aggressiveness is of great importance to determine treatment and prognosis of bladder cancers. PURPOSE: To evaluate the utility of IVIM-MRI parameters in predicting aggressiveness of bladder urothelial carcinoma. STUDY TYPE: Prospective. POPULATION MODEL: Sixty-seven patients with bladder urothelial cancer. FIELD STRENGTH/SEQUENCE: 3.0 T/T2WI and IVIM-MRI...
May 8, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734501/using-multidimensional-topological-data-analysis-to-identify-traits-of-hip-osteoarthritis
#12
Jasmine Rossi-deVries, Valentina Pedoia, Michael A Samaan, Adam R Ferguson, Richard B Souza, Sharmila Majumdar
BACKGROUND: Osteoarthritis (OA) is a multifaceted disease with many variables affecting diagnosis and progression. Topological data analysis (TDA) is a state-of-the-art big data analytics tool that can combine all variables into multidimensional space. TDA is used to simultaneously analyze imaging and gait analysis techniques. PURPOSE: To identify biochemical and biomechanical biomarkers able to classify different disease progression phenotypes in subjects with and without radiographic signs of hip OA...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734499/blood-perfusion-of-patellar-bone-measured-by-dynamic-contrast-enhanced-mri-in-patients-with-patellofemoral-pain-a-case-control-study
#13
Rianne A van der Heijden, Dirk H J Poot, Melek Ekinci, Gyula Kotek, Peter L J van Veldhoven, Stefan Klein, Jan A N Verhaar, Gabriel P Krestin, Sita M A Bierma-Zeinstra, Marienke van Middelkoop, Edwin H G Oei
BACKGROUND: Altered perfusion might play an important role in the pathophysiology of patellofemoral pain (PFP), a common knee complaint with unclear pathophysiology. PURPOSE: To investigate differences in dynamic contrast-enhanced (DCE)-MRI perfusion parameters between patients with PFP and healthy control subjects. POPULATION/SUBJECTS/PHANTOM/SPECIMEN/ANIMAL MODEL: Thirty-five adult patients with PFP and 44 healthy adult control subjects...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734497/pseudoprogression-of-brain-tumors
#14
Stefanie C Thust, Martin J van den Bent, Marion Smits
This review describes the definition, incidence, clinical implications, and magnetic resonance imaging (MRI) findings of pseudoprogression of brain tumors, in particular, but not limited to, high-grade glioma. Pseudoprogression is an important clinical problem after brain tumor treatment, interfering not only with day-to-day patient care but also the execution and interpretation of clinical trials. Radiologically, pseudoprogression is defined as a new or enlarging area(s) of contrast agent enhancement, in the absence of true tumor growth, which subsides or stabilizes without a change in therapy...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734493/assessment-of-breast-mass-morphology-with-diffusion-weighted-mri-beyond-apparent-diffusion-coefficient
#15
Sibel Kul, Yavuz Metin, Musa Kul, Nurgul Metin, Ilker Eyuboglu, Oguzhan Ozdemir
BACKGROUND: Diffusion-weighted imaging (DWI) is a noncontrast-enhanced MRI technique. There are new promising studies on the use of DWI as a part of the enhanced or unenhanced abbreviated breast MRI protocols. PURPOSE: To evaluate the ability of breast DWI in the assessment of mass morphology and determine the contribution of this morphologic evaluation in their characterization. STUDY TYPE: Retrospective. POPULATION: In all, 213 consecutive women were breast MR imaged and had a later confirmed diagnosis...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734492/esophageal-carcinoma-intravoxel-incoherent-motion-diffusion-weighted-mri-parameters-and-histopathological-correlations
#16
Shaocheng Zhu, Yi Wei, Feifei Gao, Linlin Li, Yuehua Liu, Zixing Huang, Hehan Tang, Dandan Zheng, Xiaocheng Wei, Tingyi Sun, Bin Song
BACKGROUND: The pathological grade of esophageal carcinoma is highly determinant of patient prognosis, but it still cannot be adequately evaluated preoperatively. Compared with conventional diffusion-weighted imaging (DWI), intravoxel incoherent motion (IVIM) diffusion-weighted MRI can separate true molecular diffusion and perfusion in tissues and has been shown to be useful in characterizing malignant tumors. There is no report that compared IVIM and conventional DWI in grading esophageal carcinoma...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734491/oxygenation-sensitive-cardiovascular-magnetic-resonance-in-hypertensive-heart-disease-with-left-ventricular-myocardial-hypertrophy-and-non-left-ventricular-myocardial-hypertrophy-insight-from-altered-mechanics-and-cardiac-bold-imaging
#17
Bing-Hua Chen, Rui Wu, Dong-Aolei An, Ruo-Yang Shi, Qiu-Ying Yao, Qing Lu, Jiani Hu, Meng Jiang, James Deen, Ankush Chandra, Jian-Rong Xu, Lian-Ming Wu
BACKGROUND: BOLD (blood oxygen level dependent) MRI can detect regional condition of myocardial oxygen supply and demand by means of paramagnetic properties. PURPOSE: Noninvasive assessment of myocardial oxygenation by BOLD MRI in hypertensive patients with hypertension (HTN) left ventricular myocardial hypertrophy (LVMH) and HTN non-LVMH and its correlation with myocardial mechanics were performed. STUDY TYPE: Prospective. POPULATION: Twenty patients with HTN LVMH, 21 patients with HTN non-LVMH, and 23 normotensive controls were enrolled...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734489/diagnostic-performance-of-intravoxel-incoherent-motion-diffusion-weighted-imaging-in-the-assessment-of-the-dynamic-status-of-myocardial-perfusion
#18
Dong-Aolei An, Bing-Hua Chen, Rui-Wu, Ruo-Yang Shi, Jun Bu, Heng Ge, Jiani Hu, Jian-Rong Xu, Lian-Ming Wu
BACKGROUND: Acute myocardial infarction (AMI) is a major cause of morbidity and mortality worldwide and places a significant financial burden on our society. PURPOSE: To determine the feasibility of cardiac intravoxel incoherent motion (IVIM) in the consecutive evaluation of myocardial perfusion in myocardial infarction patients postpercutaneous coronary intervention (PCI) and to investigate the dynamic biological phenomena in myocardial perfusion after AMI. STUDY TYPE: Prospective observational study...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734484/radiomic-features-from-pretreatment-biparametric-mri-predict-prostate-cancer-biochemical-recurrence-preliminary-findings
#19
Rakesh Shiradkar, Soumya Ghose, Ivan Jambor, Pekka Taimen, Otto Ettala, Andrei S Purysko, Anant Madabhushi
BACKGROUND: Radiomics or computer-extracted texture features derived from MRI have been shown to help quantitatively characterize prostate cancer (PCa). Radiomics have not been explored depth in the context of predicting biochemical recurrence (BCR) of PCa. PURPOSE: To identify a set of radiomic features derived from pretreatment biparametric MRI (bpMRI) that may be predictive of PCa BCR. STUDY TYPE: Retrospective. SUBJECTS: In all, 120 PCa patients from two institutions, I1 and I2 , partitioned into training set D1 (N = 70) from I1 and independent validation set D2 (N = 50) from I2 ...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29734483/role-of-dynamic-contrast-enhanced-mri-in-evaluating-the-association-between-contralateral-parenchymal-enhancement-and-survival-outcome-in-er-positive-her2-negative-node-negative-invasive-breast-cancer
#20
Gi Won Shin, Yang Zhang, Min Jung Kim, Min-Ying Su, Eun-Kyung Kim, Hee Jung Moon, Jung Hyun Yoon, Vivian Youngjean Park
BACKGROUND: Background parenchymal enhancement (BPE) on dynamic contrast-enhanced (DCE)-MRI has been associated with breast cancer risk, both based on qualitative and quantitative assessments. PURPOSE: To investigate whether BPE of the contralateral breast on preoperative DCE-MRI is associated with therapy outcome in ER-positive, HER2-negative, node-negative invasive breast cancer. STUDY TYPE: Retrospective. POPULATION: In all, 289 patients with unilateral ER-positive, HER2-negative, node-negative breast cancer larger than 5 mm...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
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