ガドキセト酸ナトリウムを用いた肝ダイナミックMRI検査の撮像タイミングに関する考察

• Published in: 日本放射線技術学会雑誌 Vol. 65; no. 5; pp. 626 - 630
• Main Authors: 秋元, 聰, 森, 泰成, 藤井, 友則, 古家, 乾
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本放射線技術学会 2009
• Subjects: arterial phase; EOB; Gadoxetate Sodium (Gd-EOB-DTPA; hepatobiliary phase; magnetic resonance (MR) imaging; multiphase acquisition
• ISSN: 0369-4305; 1881-4883
• DOI: 10.6009/jjrt.65.626

Gadoxetate Sodium (Gd-EOB-DTPA, EOB) is a new contrast agent for magnetic resonance (MR) imaging that allows both vascular and hepatobiliary imaging in one examination. Often in the arterial phase, however, appropriate scan timing is missed and contrast enhancement is not enough. In addition, to shorten the complete examination, some studies have been conducted to examine scan timing at the hepatobiliary phase earlier than 20 min after injection. We studied the optimal scan timing both at the arterial and the hepatobiliary phase. It was appropriate that multiphase acquisition of MR imaging at the arterial phase should be aimed around 25 sec after injection. Moreover, the liver-spleen contrast ratio (CL–S) at the hepatobiliary phase was highest at 60 min after injection, and the acquisition of an image earlier than 20 minutes lowered the CL–S. In the future, it is desirable to establish how to use Gd-EOB-DTPA (EOB) for hepatic MR imaging after taking the extent of liver damage into consideration.