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4D Flow MRI Reflects Physiological Hemodynamics for the Diagnosis and Management of Portosystemic Shunts
Magn Reson Med Sci. 2024 Feb 29. doi: 10.2463/mrms.ici.2023-0161. Online ahead of print.ABSTRACTA woman in her sixties with portosystemic shunt and hepatic encephalopathy underwent open mesenteric vein ligation, resulting in improved portal flow and blood ammonia. In this case, 4D flow MRI was a valuable diagnostic and follow-up tool, visualizing and quantifying physiological portal hemodynamics with features distinct from those of contrast-enhanced CT and digital subtraction angiography. Our case study highlights the value of 4D flow MRI for managing portosystemic shunts.PMID:38417875 | DOI:10.2463/mrms.ici.2023-0161 (Sou...
Source: Magnetic Resonance in Medical Sciences - February 28, 2024 Category: Radiology Authors: Atsushi Higaki Akira Yamamoto Toshimasa Okada Tomio Ueno Yasuyuki Tomiyama Kosuke Ito Tsutomu Tamada Source Type: research

Histological Properties of a Chemically Fixed Human Embryo Visualized with Quantitative Susceptibility Mapping
Magn Reson Med Sci. 2024 Feb 27. doi: 10.2463/mrms.tn.2023-0149. Online ahead of print.ABSTRACTA chemically fixed Carnegie stage 23 (approximately 56 days of gestation) human embryo specimen was imaged using 3D spin-echo and gradient-echo sequences in a static magnetic field strength of 4.74T, and a quantitative susceptibility map was calculated using the 3D gradient-echo image. The acquired 3D microscopic images (90 μm cube voxel size) clarified the relationship between R2 (transverse relaxation rate), R2* (apparent transverse relaxation rate), and magnetic susceptibility in the heart, liver, kidney, and spinal cord. The...
Source: Magnetic Resonance in Medical Sciences - February 28, 2024 Category: Radiology Authors: Toru Shirai Yasuhiko Terada Katsumi Kose Shigehito Yamada Source Type: research

Comparison of 3D Magnetization-transfer- and Spectral-presaturation-with-inversion-recovery-based Neuromelanin Imaging
CONCLUSIONS: Detection of neuromelanin in SNc and LC was improved by the use of SPIR compared to MT pulse in 3D neuromelanin imaging.PMID:38382996 | DOI:10.2463/mrms.mp.2023-0095 (Source: Magnetic Resonance in Medical Sciences)
Source: Magnetic Resonance in Medical Sciences - February 21, 2024 Category: Radiology Authors: Midori Kusama Yukio Kimura Masami Yoneyama Takashi Namiki Takeshi Tamaru Kenji Miyagi Noriko Sato Source Type: research