A Comprehensive Study on Automated Muscle Segmentation for Assessing Fat Infiltration in Neuromuscular Diseases
Severity and progression of degenerative neuromuscular diseases can be sensitively captured by evaluating the fat infiltration of muscle tissue in T1-weighted MRI scans of human limbs. For computing the fat fraction, the original muscle needs to be first separated from other tissue.Five conceptionally different approaches were investigated and evaluated with respect to the segmentation of muscles of human thighs. Besides a rather basic thresholding approach, local (level set) as well as global (graph cut) energy-minimizing segmentation approaches with and without a shape prior energy term were examined. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 18, 2017 Category: Radiology Authors: Michael Gadermayr, Constantin Disch, Madlaine M üller, Dorit Merhof, Burkhard Gess Source Type: research
Insight into the dynamic of gadolinium based contrast agent (GBCA) hypersensitivity: Acquisition, persistence and disappearance
Anaphylaxis against gadolinium based contrast agents (GBCAs) has been reported in all severity grades but is less frequent than hypersensitivity/allergy against iodinated contrast materials. Once a patient acquires such an adverse reaction a life-long premedication is usually the consequence in concert with GBCA-enhanced MR-imaging procedures. The usefulness of this prophylaxis has been questioned, and discussed controversially during the past. The herein presented case may shed some light into the dynamic of contrast-medium-induced hypersensitivity reactions. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 13, 2017 Category: Radiology Authors: Ingrid Boehm, Martin Hungerb ühler, Johannes T. Heverhagen Source Type: research
Cover 2 -- Editorial Board
(Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 9, 2017 Category: Radiology Source Type: research
fm iii and iv -- Contents/Barcode
(Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 9, 2017 Category: Radiology Source Type: research
Localizing implanted fiducial markers using undersampled co-RASOR MR imaging
The goal of this work was to use an undersampled, dual-plane centre-out radial sampling acquisition pulse sequence, with off-resonance reception, to localize fiducial markers with reduced acquisition time. Two iterative reconstruction techniques, conjugate gradient CG-SENSE and the variational penalty Total Generalized Variation (TGV), were investigated to minimize the undersampling artifacts in off-resonant radial imaging. Simulations of a field perturber were performed at sub-millimeter resolution and reconstructed to display signal pileups that can be radially compressed towards the geometric centre of the perturber for...
Source: Magnetic Resonance Imaging - December 9, 2017 Category: Radiology Authors: Evan McNabb, Raimond Wong, Michael D. Noseworthy Source Type: research
Localizing Implanted Fiducial Markers using Undersampled co-RASOR MR Imaging
The goal of this work was to use an undersampled, dual-plane centre-out radial sampling acquisition pulse sequence, with off-resonance reception, to localize fiducial markers with reduced acquisition time. Two iterative reconstruction techniques, conjugate gradient CG-SENSE and the variational penalty Total Generalized Variation (TGV), were investigated to minimize the undersampling artifacts in off-resonant radialimaging. Simulations of a field perturber were performed at sub-millimeter resolution and reconstructed to display signal pileups that can be radially compressed towards the geometric center of the perturber for ...
Source: Magnetic Resonance Imaging - December 9, 2017 Category: Radiology Authors: Evan McNabb, Raimond Wong, Michael D. Noseworthy Source Type: research
K-space trajectories in 3D-GRASE sequence for high resolution structural imaging
To propose and evaluate new k-space trajectories for 3D-GRASE to improve scan time over 3D-FSE/TSE for high resolution structural imaging. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 8, 2017 Category: Radiology Authors: Alexandra Cristobal-Huerta, Dirk H.J. Poot, Mika W. Vogel, Gabriel P. Krestin, Juan A. Hernandez-Tamames Tags: Original contribution Source Type: research
K-space trajectories in 3D-GRASE Sequence for High Resolution Structural Imaging
To propose and evaluate new k-space trajectories for 3D-GRASE to improve scan time over 3D-FSE/TSE for high resolution structural imaging. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 8, 2017 Category: Radiology Authors: Alexandra Cristobal-Huerta, Dirk H.J. Poot, Mika W. Vogel, Gabriel P. Krestin, Juan A. Hernandez-Tamames Source Type: research
Pseudo continuous arterial spin labeling quantification in anemic subjects with hyperemic cerebral blood flow
To investigate possible sources of quantification errors in global cerebral blood flow (CBF) measurements by comparing pseudo continuous arterial spin labeling (PCASL) and phase contrast (PC) MRI in anemic, hyperemic subjects. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 8, 2017 Category: Radiology Authors: Adam Bush, Yaqiong Chai, So Young Choi, Lena Vaclavu, Scott Holland, Aart Nederveen, Thomas Coates, John Wood Tags: Original contribution Source Type: research
A comparison of 4D flow MRI-derived wall shear stress with computational fluid dynamics methods for intracranial aneurysms and carotid bifurcations — A review
4D flow MRI is a relatively quick method for obtaining wall shear stress (WSS) in vivo, a hemodynamic parameter which has shown promise in risk stratification for rupture of cerebrovascular diseases such as intracranial aneurysms and atherosclerotic plaques. The accuracy of such measurements is still largely unknown. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 6, 2017 Category: Radiology Authors: Jeremy Szajer, Kevin Ho-Shon Source Type: research
Lesion magnetic susceptibility response to hyperoxic challenge: A biomarker for malignant brain tumor microenvironment?
Quantitative susceptibility mapping has been previously used to differentiate lesions in patients with brain tumors. The aim of this work was to characterize the response of magnetic susceptibility differences in malignant brain tumors and surrounding edema to hyperoxic and hypercapnic respiratory challenges. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 5, 2017 Category: Radiology Authors: Pinar Senay Özbay, Sonja Stieb, Cristina Rossi, Oliver Riesterer, Andreas Boss, Tobias Weiss, Felix Kuhn, Klaas Paul Pruessmann, Daniel Nanz Tags: Original contribution Source Type: research
Inflammatory hepatic adenomas: Characterization with hepatobiliary MRI contrast agents
To characterize the MRI appearance of inflammatory hepatic adenomas using hepatobiliary contrast agents. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 5, 2017 Category: Radiology Authors: James F. Glockner, Christine U. Lee, Taofic Mounajjed Tags: Original contribution Source Type: research
Intravoxel incoherent motion diffusion-weighted imaging for the assessment of renal fibrosis of chronic kidney disease: A preliminary study
To investigate the potential of Intravoxel incoherent motion diffusion-weighted imaging(IVIM-DWI) for the assessment of renal fibrosis in chronic kidney disease (CKD), using histopathology as a reference standard. (Source: Magnetic Resonance Imaging)
Source: Magnetic Resonance Imaging - December 5, 2017 Category: Radiology Authors: Wei Mao, Jianjun Zhou, Mengsu Zeng, Yuqin Ding, Lijie Qu, Caizhong Chen, Xiaoqiang Ding, Yaqiong Wang, Caixia Fu, Feng Gu Source Type: research
