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Efficacy of Whole-Blood Model of Gadolinium-Based Contrast Agent Relaxivity in Predicting Vascular MR Signal Intensity In Vivo.
J Magn Reson Imaging
August 2024
Department of Radiology, University of Colorado Anschutz Medical Center, Aurora, Colorado, USA.
Background: Previous in vitro studies have described sub-linear longitudinal and heightened transverse HO relaxivities of gadolinium-based contrast agents (GBCAs) in blood due to their extracellular nature. However, in vivo validation is lacking.
Purpose: Validate theory describing blood behavior of R and R* in an animal model.
Saturation recovery-prepared magnetic resonance angiography for assessment of left atrial and esophageal anatomy.
Br J Radiol
July 2021
Comprehensive Arrhythmia Research & Management Center, University of Utah, Salt Lake City, UT, USA.
Objectives: Magnetic resonance angiography (MRA) has been established as an important imaging method in cardiac ablation procedures. In pulmonary vein (PV) isolation procedures, MRA has the potential to minimize the risk of severe complications, such as atrio-esophageal fistula, by providing detailed information on esophageal position relatively to cardiac structures. However, traditional non-gated, first-pass (FP) MRA approaches have several limitations, such as long breath-holds, non-uniform signal intensity throughout the left atrium (LA), and poor esophageal visualization.
View Article and Find Full Text PDFEvaluating survival in subjects with astrocytic brain tumors by dynamic susceptibility-weighted perfusion MR imaging.
PLoS One
April 2021
Biostatistics, University of Nebraska Medical Center, Omaha, Nebraska, United States of America.
Purpose: Studies have evaluated the application of perfusion MR for predicting survival in patients with astrocytic brain tumors, but few of them statistically adjust their results to reflect the impact of the variability of treatment administered in the patients. Our aim was to analyze the association between the perfusion values and overall survival time, with adjustment for various clinical factors, including initial treatments and follow-up treatments.
Materials And Methods: This study consisted of 51 patients with astrocytic brain tumors who underwent perfusion-weighted MRI with MultiHance® at a dose of 0.
Technique and protocols for cardiothoracic time-resolved contrast-enhanced magnetic resonance angiography sequences: a systematic review.
Clin Radiol
February 2021
Radiography and Diagnostic Imaging, School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland.
Aim: To review contrast medium administration protocols used for cardiothoracic applications of time-resolved, contrast-enhanced magnetic resonance angiography (MRA) sequences.
Materials And Methods: A systematic search of the literature (Medline/EMBASE) was performed to identify articles utilising time-resolved MRA sequences, focusing on type of sequence, adopted technical parameters, contrast agent (CA) issues, and acquisition workflow. Study design, year of publication, population, magnetic field strength, type, dose, and injection parameters of CA, as well as technical parameters of time-resolved MRA sequences were extracted.
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