著者

藤原 康博 石田 翔太 木村 浩彦

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

pp.2020-1719, (Released:2020-09-28)

参考文献数

77

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Arterial spin labeling (ASL) is a method for evaluating perfusion that uses magnetically labeled arterial blood water as an endogenous tracer. Although research and technical development have been conducted for a long time, introduction of ASL into clinical practice has been delayed because of its low signal-to-noise ratio (SNR). In recent years, advances in the pulse sequence and hardware, such as high static magnetic fields and high-sensitivity phased array coils, have made it possible to obtain high-SNR ASL images in a clinically acceptable time. In this regard, a consensus paper proposed simple and standard usage, including recommended techniques and parameters, to obtain a consistent image quality. Major MR manufacturers offered ASL pulse sequences based on this study. Hence, ASL has been used in clinical practice, and the effectiveness in measuring perfusion using ASL has been reported for the diagnosis of various neurological disorders. This article will review the technique for perfusion measurement and quantification and the recent technical progress in ASL.

著者

藤原 康博 石田 翔太 木村 浩彦

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.40, no.4, pp.149-168, 2020-11-15 (Released:2020-12-15)

参考文献数

77

---

Arterial spin labeling (ASL) is a method for evaluating perfusion that uses magnetically labeled arterial blood water as an endogenous tracer. Although research and technical development have been conducted for a long time, introduction of ASL into clinical practice has been delayed because of its low signal-to-noise ratio (SNR). In recent years, advances in the pulse sequence and hardware, such as high static magnetic fields and high-sensitivity phased array coils, have made it possible to obtain high-SNR ASL images in a clinically acceptable time. In this regard, a consensus paper proposed simple and standard usage, including recommended techniques and parameters, to obtain a consistent image quality. Major MR manufacturers offered ASL pulse sequences based on this study. Hence, ASL has been used in clinical practice, and the effectiveness in measuring perfusion using ASL has been reported for the diagnosis of various neurological disorders. This article will review the technique for perfusion measurement and quantification and the recent technical progress in ASL.

著者

藤原 康博 木村 浩彦

出版者

医用画像情報学会

雑誌

医用画像情報学会雑誌 (ISSN:09101543)

巻号頁・発行日

vol.32, no.4, pp.xxxvii-xli, 2015-12-25 (Released:2015-12-26)

参考文献数

40

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Arterial spin labeling (ASL) is a means of perfusion assessments in magnetic resonance imaging (MRI). Since ASL uses arterial blood water as an endogenous tracer, it is no need to use contrast agent or irradiation. Therefore, these features make ASL complete non‐invasive and easily accepted in routine clinical practice. Recent prevalence of 3T clinical MRI system has dramatically increased the quality of ASL image along together with the development of ASL techniques. In this paper, we have described the overview of ASL techniques such as labeling scheme, post‐label delay, background signal control, and intra vascular signal suppression. Finally, we have presented some clinical cases with ASL application from our own experience.

著者

若林 佑 髙田 健次 木下 一之 坂井 豊彦 小坂 信之 木村 浩彦

出版者

一般社団法人日本インターベンショナルラジオロジー学会

雑誌

日本インターベンショナルラジオロジー学会雑誌 (ISSN:13404520)

巻号頁・発行日

vol.35, no.4, pp.355-358, 2021 (Released:2021-06-22)

参考文献数

10

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We report a case of large pancreatic duodenal artery aneurysm with fistula formation to superior mesenteric vein (SMV), which was successfully treated by coil embolization. This patient had a history of surgery for pancreatic pseudocyst approximately 30 years earlier, that might have been related to the arteriovenous fistula formation. Coil embolization was successfully per-formed for the aneurysm with the arteriovenous fistula to SMV. After the embolization, SMV thrombosis was temporarily observed but disappeared one month later on enhanced CT.