Rapid Imaging: Recent Advances in Abdominal MRI for Reducing Acquisition Time and Its Clinical Applications

Abstract

Magnetic resonance imaging (MRI) plays an important role in abdominal imaging. The high contrast resolution offered by MRI provides better lesion detection and its capacity to provide multiparametric images facilitates lesion characterization more effectively than computed tomography. However, the relatively long acquisition time of MRI often detrimentally affects the image quality and limits its accessibility. Recent developments have addressed these drawbacks. Specifically, multiphasic acquisition of contrast-enhanced MRI, free-breathing dynamic MRI using compressed sensing technique, simultaneous multi-slice acquisition for diffusion-weighted imaging, and breath-hold three-dimensional magnetic resonance cholangiopancreatography are recent notable advances in this field. This review explores the aforementioned state-of-theart techniques by focusing on their clinical applications and potential benefits, as well as their likely future direction.

A novel approach for pre-surgical evaluation of facial morphometry in children using magnetic resonance imaging scans of the brain: A feasibility analysis

“…Though we could obtain measurements successfully with 3D reconstructed images from 5 mm brain slices, it has stated that 3D reconstructions performed with slices thicker than 1 mm are not optimum for such purposes due to stair-step artefact. The stair-step artefact may interfere with the accuracy of obtaining body surface measurements (Yoon JH, et al, 2019). Such artefacts could be prevented by modifying the MRI protocol and performing sagittal sequence at 1 mm slice thickness (Fig.…”

“…In order to prevent motion artefacts, the patient needed to be motionless throughout the procedure. Therefore, the duration of the scan is a crucial factor for children (Reeth EV, et al, 2012;Yoon JH, et al, 2019). The scanning time is proportionate to the number of image sequences performed (Yoon JH, et al, 2019).…”

“…Therefore, the duration of the scan is a crucial factor for children (Reeth EV, et al, 2012;Yoon JH, et al, 2019). The scanning time is proportionate to the number of image sequences performed (Yoon JH, et al, 2019). Out of many brain MRI image sequences, the current study has included only the axial T2 weighted and sagittal T1weighted sequences, hence can be considered as a relatively limited time-consuming protocol.…”

Applying Compressed Sensing Volumetric Interpolated Breath-Hold Examination and Spiral Ultrashort Echo Time Sequences for Lung Nodule Detection in MRI

“…CS-VIBE allows image acquisition with high spatial and temporal resolution during a short breath-hold scan time. Now integrated into routine clinical practice for abdomen, breast, brain, and cardiac MRI [ 9 , 10 , 11 ], its application to lung images is currently under investigation. In lung imaging, CS-VIBE has been used for dynamic MRI, pulmonary ventilation, and lung tumor movement evaluation [ 12 , 13 ].…”

Evaluating of the Quality of Hepatic Diffusion Weighted Imaging Using Multiband Imaging With Variable-Rate Selective Excitation

“…Conventional diffusion-weighted imaging (DWI) has been widely reported to be useful in hepatic magnetic resonance imaging (MRI) for tumor detection and differentiation and the evaluation of infections, 1,2 yet it requires significant time for the imaging process. Although many imaging methods, such as long echo-train imaging, parallel imaging, and compressed sensing have significantly reduced the acquisition time, 3 general DWI is based on spin-echo T2-weighted or echo-planar imaging, which requires a sufficiently long TR 4 . Therefore, it has been difficult to shorten the actual scanning time, even if the actual signal-collection time was reduced through various means.…”