著者

長谷川 恵理 山下 進太郎 吉田 登 新島 新一 徳川 城治 菱井 誠人 尾﨑 裕 清水 俊明

出版者

日本小児放射線学会

雑誌

日本小児放射線学会雑誌 (ISSN:09188487)

巻号頁・発行日

vol.34, no.1, pp.36-41, 2018 (Released:2018-06-14)

参考文献数

16

---

We report a case of an interhemispheric cyst complicated by subdural hematoma in a 16-year-old boy. He was diagnosed with a right interhemispheric cyst on magnetic resonance imaging (MRI) of the head during examination for an afebrile seizure at 14 years of age. Approximately one year later, a head MRI was performed to investigate the cause of headaches. The interhemispheric cyst was found to have decreased in size, but subdural effusion continuing from the cyst at the right convexity was observed. Two months later, following a severe headache, a head MRI showed hemorrhage at the place of effusion in the subdural space. Additionally, displacement of the brain parenchyma was observed. Emergent drainage of the subdural hematoma was performed, and the patient was diagnosed with chronic subdural hematoma. In this case, the head MR images taken over time showed the development of subdural effusion from the interhemispheric cyst, followed by the development of a subdural hematoma. Slight trauma is known to cause subdural hematoma in patients with arachnoid cysts; upon diagnosis, it is important to inform patients of the precautions to prevent an increase in intracranial pressure and response to the symptoms of increasing intracranial pressure.

著者

伊藤 憲之 濵﨑 望 堂領 和彦 尾﨑 裕

出版者

日本磁気共鳴医学会

雑誌

日本磁気共鳴医学会雑誌 (ISSN:09149457)

巻号頁・発行日

vol.43, no.4, pp.174-181, 2023-11-15 (Released:2023-12-08)

参考文献数

15

---

Golden Angle Radial Sparse Parallel-Volumetric Interpolated Breath hold Examination (GRASP-VIBE) using compressed sensing and golden-angle radial sampling is a gradient echo (GRE) sequence that provides an inflow effect. The purpose of this study was to investigate parameters for non-contrast visualization of the renal artery using GRASP-VIBE with respiratory synchronization by the liver gate. We used a flow phantom and a self-made phantom to determine effective fat suppression methods and appropriate settings for repetition time (TR) and flip angle (FA). We also performed imaging on five healthy volunteers and compared the ability to visualize the renal artery. In the phantom study, water excitation showed the highest fat suppression effect ; the flow phantom was well visualized at TR 7.2 ms~9.0 ms and FA 9°~13°. In the volunteer study, the renal artery was best visualized at TR 7.2 ms and FA 13°. The results suggest that GRASP-VIBE can be used to visualize the renal artery without contrast enhancement by using the parameter settings examined in this study.