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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 : MRMS - February 28, 2024 Category: Radiology Authors: Toru Shirai Yasuhiko Terada Katsumi Kose Shigehito Yamada Source Type: research

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 : MRMS - February 28, 2024 Category: Radiology Authors: Atsushi Higaki Akira Yamamoto Toshimasa Okada Tomio Ueno Yasuyuki Tomiyama Kosuke Ito Tsutomu Tamada 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 : MRMS)
Source: Magnetic Resonance in Medical Sciences : MRMS - February 21, 2024 Category: Radiology Authors: Midori Kusama Yukio Kimura Masami Yoneyama Takashi Namiki Takeshi Tamaru Kenji Miyagi Noriko Sato Source Type: research

Kidney R2* Mapping for Noninvasive Evaluation of Iron Overload in Paroxysmal Nocturnal Hemoglobinuria
CONCLUSION: IDEAL-IQ has a possibility of becoming a useful method for the noninvasive evaluation of renal iron overload in PNH patients.PMID:38369335 | DOI:10.2463/mrms.mp.2023-0114 (Source: Magnetic Resonance in Medical Sciences : MRMS)
Source: Magnetic Resonance in Medical Sciences : MRMS - February 18, 2024 Category: Radiology Authors: Koichi Ito Kazuyuki Ohgi Koichiro Kimura Koichi Ishitaki Akiyoshi Yamashita Hiroyuki Yokote Shunji Tsukuda Ko Matsushita Yuko Naraoka Amon Fujioka Tatsuki Ono Source Type: research

Brain Structures in a Human Embryo Imaged with MR Microscopy
CONCLUSION: We have visualized brain structures in a human embryo that had not previously been delineated by MR microscopy. We discussed pulse sequences appropriate for the structures of interest. This methodology would provide a way to visualize crucial embryological information about the anatomical structure of human embryos.PMID:38369336 | DOI:10.2463/mrms.mp.2023-0110 (Source: Magnetic Resonance in Medical Sciences : MRMS)
Source: Magnetic Resonance in Medical Sciences : MRMS - February 18, 2024 Category: Radiology Authors: Kazuki Kunieda Kazuyuki Makihara Shigehito Yamada Masayuki Yamaguchi Takashi Nakamura Yasuhiko Terada Source Type: research