Distortion-free diffusion tensor imaging for evaluation of lumbar nerve roots: Utility of direct coronal single-shot turbo spin-echo diffusion sequence
Diffusion tensor imaging (DTI) based on a single-shot echo planer imaging (EPI-DTI) is an established method that has been used for evaluation of lumbar nerve disorders in previous studies, but EPI-DTI has problems such as a long acquisition time, due to a lot of axial slices, and geometric distortion. To solve these problems, we attempted to apply DTI based on a single-shot turbo spin echo (TSE-DTI) with direct coronal acquisition. Our purpose in this study was to investigate whether TSE-DTI may be more useful for evaluation of lumbar nerve disorders than EPI-DTI. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - February 3, 2018 Category: Radiology Authors: Takayuki Sakai, Kunio Doi, Masami Yoneyama, Atsuya Watanabe, Tosiaki Miyati, Noriyuki Yanagawa Tags: Original contribution Source Type: research
Cluster-level statistical inference in fMRI datasets: The unexpected behavior of random fields in high dimensions
Identifying regional effects of interest in MRI datasets usually entails testing a priori hypotheses across many thousands of brain voxels, requiring control for false positive findings in these multiple hypotheses testing. Recent studies have suggested that parametric statistical methods may have incorrectly modeled functional MRI data, thereby leading to higher false positive rates than their nominal rates. Nonparametric methods for statistical inference when conducting multiple statistical tests, in contrast, are thought to produce false positives at the nominal rate, which has thus led to the suggestion that previously...
Source: Magnetic Resonance Imaging - February 3, 2018 Category: Radiology Authors: Ravi Bansal, Bradley S. Peterson Tags: Original contribution Source Type: research
Dynamic contrast-enhanced (DCE) MRI derived kinetic perfusion indices may help predicting seizure control in single calcified neurocysticercosis
In this study, we assessed the possible role of DCE-MRI and matrix metalloproteinases (MMP)-9 levels in predicting seizure recurrence. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 21, 2018 Category: Radiology Authors: Alok Kumar Singh, Ravindra Kumar Garg, Rakesh Kumar Gupta, Hardeep Singh Malhotra, Gaurav Raj Agrawal, Nuzhat Husain, Chandra Mani Pandey, Prativa Sahoo, Neeraj Kumar Tags: Original contribution Source Type: research
Dynamic contrast-enhanced (DCE) MRI derived kinetic perfusion indices may help predicting seizure control in single calcified neurocysticercosis
In this study, we assessed the possible role of DCE-MRI and matrix metalloproteinases (MMP)-9 levels in predicting seizure recurrence. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 21, 2018 Category: Radiology Authors: Alok Kumar Singh, Ravindra Kumar Garg, Rakesh Kumar Gupta, Hardeep Singh Malhotra, Gaurav Raj Agrawal, Nuzhat Husain, Chandra Mani Pandey, Prativa Sahoo, Neeraj Kumar Tags: Original contribution Source Type: research
Improved coronary magnetic resonance angiography using gadobenate dimeglumine in pediatric congenital heart disease
CMRA in pediatrics remains challenging due to the smaller vessel size, high heart rates (HR), potential image degradation caused by limited patient cooperation and long acquisition times. High-relaxivity contrast agents have been shown to improve coronary imaging in adults, but limited data is available in children. We sought to investigate whether gadobenate dimeglumine (Gd-BOPTA) together with self-navigated inversion-prepared coronary magnetic resonance angiography (CMRA) sequence design improves coronary image quality in pediatric patients. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 12, 2018 Category: Radiology Authors: Miguel Silva Vieira, Markus Henningsson, Nathalie Dedieu, Vassilios S. Vassiliou, Aaron Bell, Sujeev Mathur, Kuberan Pushparajah, Carlos Alberto Figueroa, Tarique Hussain, Ren é Botnar, Gerald F. Greil Tags: Original contribution Source Type: research
Multi-tissue partial volume quantification in multi-contrast MRI using an optimised spectral unmixing approach
Multi-tissue partial volume estimation in MRI images is investigated with a viewpoint related to spectral unmixing as used in hyperspectral imaging. The main contribution of this paper is twofold. It firstly proposes a theoretical analysis of the statistical optimality conditions of the proportion estimation problem, which in the context of multi-contrast MRI data acquisition allows to appropriately set the imaging sequence parameters. Secondly, an efficient proportion quantification algorithm based on the minimisation of a penalised least-square criterion incorporating a regularity constraint on the spatial distribution o...
Source: Magnetic Resonance Imaging - January 8, 2018 Category: Radiology Authors: Guylaine Collewet, Sa ïd Moussaoui, Cécile Deligny, Tiphaine Lucas, Jérôme Idier Tags: Original contribution Source Type: research
Three-dimensional ultrashort echo time cones (3D UTE-Cones) magnetic resonance imaging of entheses and tendons
We present three-dimensional ultrashort echo time Cones (3D-UTE-Cones) imaging as well as quantification of T2* and magnetization transfer ratio (MTR) of Achilles tendon and its enthesis of healthy volunteers and patients with psoriatic arthritis (PsA) using a 3T scanner. Quantitative T2*, T2 and magnetization transfer ratio (MTR) measurements of Achilles tendon and its enthesis were performed on healthy volunteers (n=7) and PsA patients (n=9) with 3D-UTE-Cones and clinical sequences at 3T. T2* was measured via single-component fitting of UTE images from two interleaved dual echo 3D-UTE-Cones acquisitions. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 5, 2018 Category: Radiology Authors: Bimin Chen, Yinghua Zhao, Xin Cheng, Yajun Ma, Eric Y. Chang, Arthur Kavanaugh, Sirun Liu, Jiang Du Tags: Original contribution Source Type: research
Automatic motion correction of Musculoskeletal MRI using DSLR camera
The purpose of this study is to illustrate motion correction in Musculoskeletal (MSK) Magnetic Resonance Imaging (MRI) through utilization of information from an optical tracker to capture the extent and instant of motion. A Digital Single Lens Reflexive camera is employed as the optical tracker to capture the extent and instant of motion. A checkerboard is utilized as a marker that is placed on the coil. Shift of the checkerboard provides the extent of motion, which is captured by camera and is used for motion correction in (MSK)-MRI images. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 4, 2018 Category: Radiology Authors: Shivaprasad Ashok Chikop, Antharikshanagar Bellappa Sachin Anchan, Girish Koulagi, Arush Arun Honnedevasthana, Shaik Imam, Sairam Geethanath Source Type: research
Do patients with mild traumatic brain injury have more lesions on their MRI scans?
A recent paper in this journal by Trifan et al. [1] claims to demonstrate that subjects with mild traumatic brain injury (mTBI) have significantly greater numbers of brain lesions (FLAIR hyperintensities and SWI hypointensities) than a group of age-related control subjects. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 4, 2018 Category: Radiology Authors: Michael Hutchinson Tags: Letter to the editor Source Type: research
Automatic motion correction of Musculoskeletal MRI using DSLR camera
The purpose of this study is to illustrate motion correction in Musculoskeletal (MSK) Magnetic Resonance Imaging (MRI) through utilization of information from an optical tracker to capture the extent and instant of motion. A Digital Single Lens Reflexive camera is employed as the optical tracker to capture the extent and instant of motion. A checkerboard is utilized as a marker that is placed on the coil. Shift of the checkerboard provides the extent of motion, which is captured by camera and is used for motion correction in (MSK)-MRI images. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 4, 2018 Category: Radiology Authors: Shivaprasad Ashok Chikop, Antharikshanagar Bellappa Sachin Anchan, Girish Koulagi, Arush Arun Honnedevasthana, Shaik Imam, Sairam Geethanath Source Type: research
Do patients with mild traumatic brain injury have more lesions on their MRI scans?
A recent paper in this journal by Trifan et al. [1] claims to demonstrate that subjects with mild traumatic brain injury (mTBI) have significantly greater numbers of brain lesions (FLAIR hyperintensities and SWI hypointensities) than a group of age-related control subjects. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 4, 2018 Category: Radiology Authors: Michael Hutchinson Tags: Letter to the Editor Source Type: research
Evaluation of lymphedema in upper extremities by MR lymphangiography: Comparison with lymphoscintigraphy
To validate usefulness of magnetic resonance (MR) lymphangiography for evaluation of peripheral lymphedema in upper extremities by comparison with lymphoscintigraphy. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - January 3, 2018 Category: Radiology Authors: Jae Seok Bae, Roh-Eul Yoo, Seung Hong Choi, Seong Oh. Park, Hak Chang, Minseok Suh, Gi Jeong Cheon Tags: Original contribution Source Type: research
