Fast Abdominal Magnetic Resonance Imaging

Abstract

Abdominal imaging is the driving force that necessitates the development of numerous techniques for accelerated image acquisition in magnetic resonance imaging (MRI). Today, numerous techniques are available that enable?rapid, high spatial resolution acquisition for?both T1 and T2 weighted images. These?techniques open new opportunities in the detection and classification of numerous pathologies in the abdomen. However, there is still ongoing progress in the development of fast and ultrafast sequences and promising techniques are currently close to clinical application. With these 4D-technologies, MRI is becoming the central imaging modality for dynamic, motion-compensated imaging of the parenchymal abdominal organs such as liver, pancreas and kidney. Key points: ??Fast imaging techniques are especially valuable in the upper abdomen, as this region is particularly affected by respiratory motion. ??Parallel imaging and k-space-based acceleration techniques are the basic components of fast 3?D sequences. ??By further accelerating 3?D imaging with high spatial resolution, 4?D techniques become available. Citation Format: ??Budjan J., Schoenberg S. O., Riffel P. Fast Abdominal Magnetic Resonance Imaging. Fortschr R?ntgenstr 2016; 188: 551???558

Measurement of Murine Single‐Kidney Glomerular Filtration Rate Using Dynamic Contrast‐Enhanced MRI

“…A 3D coverage of kidneys can provide a more complete assessment of renal function, especially for kidneys with focal abnormalities. Techniques such as parallel imaging (39) or non-Cartesian sampling (40) may expedite data acquisition and realize fast 3D DCE-MRI. Second, kidney regions with gadolinium blooming effects were excluded during data analysis, which might introduce subtle inaccuracies in measured renal parameters.…”

Application of a Novel Iterative Denoising and Image Enhancement Technique in T1-Weighted Precontrast and Postcontrast Gradient Echo Imaging of the Abdomen

“…One of the main foci of MRI consists of further characterization and examination of the organs of the abdomen 4–7 . However, abdominal MRI is a challenging task due to motion of the abdominal organs, especially caused by breathing 8 . Although traditional spin-echo sequences provide highly qualitative and robust images, this technique is too time-consuming for abdominal MRI due to motion 9 .…”

“…[4][5][6][7] However, abdominal MRI is a challenging task due to motion of the abdominal organs, especially caused by breathing. 8 Although traditional spin-echo sequences provide highly qualitative and robust images, this technique is too time-consuming for abdominal MRI due to motion. 9 Gradient echo (GRE) imaging presents an alternative with reduced imaging time due to shortened repetition time (TR).…”

Intraindividual Comparison of Compressed Sensing‐Accelerated Cartesian and Radial Arterial Phase Imaging of the Liver in an Experimental Tumor Model

“…14,21,40,41 In contrast to this, Cartesian trajectories are often considered more motion sensitive, bearing the risk of impaired IQ and inadequate vessel delineation. 42 With regard to MAs, both sequences received excellent ratings, yielding no significant difference. The CS-VIBE provided comparable and even superior results in terms of hepatic vessel delineation and the number of HADPs assessed.…”

“…Intrinsically higher motion robustness due to multiple readouts of the k-space center is considered a key advantage of radial k-space sampling 14,21,40,41 . In contrast to this, Cartesian trajectories are often considered more motion sensitive, bearing the risk of impaired IQ and inadequate vessel delineation 42 . With regard to MAs, both sequences received excellent ratings, yielding no significant difference.…”