Real-time field monitoring system for compressed sensing reconstruction on MRI

2015 Fiscal Year Final Research Report

• Project/Area Number: 25461820
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Radiation science
• Research Institution: Kyoto University
• Principal Investigator: Urayama Shin-ichi 京都大学, 医学(系)研究科(研究院), 助教 (10270729)
• Co-Investigator(Kenkyū-buntansha): 武田 和行 京都大学, 理学(系)研究科(研究院), 講師 (20379308) ; 森口 央基 駒澤大学, 公私立大学の部局等, 教授 (70296705) ; 大石 直也 京都大学, 医学(系)研究科(研究院), 助教 (40526878)
• Co-Investigator(Renkei-kenkyūsha): SUZUKI Takashi 京都大学, 医学研究科, 助教 (10572224)
• Research Collaborator: Poole Michael 独ユーリッヒ脳医科学研究所, 研究員
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: MRI / 圧縮センシング / 傾斜磁場コイル / 磁場計測

Outline of Final Research Achievements

On an indispensable scanner MRI in clinic, ultra-fast imaging techniques are still very important. Non-Cartesian, sub-nyquist MR imaging and reconstruction, like compressed sensing, is a promising technique to shorten scan time dramatically without reduction of image quality. However, unlike general MR imaging techniques, the trajectory on the K-space is not parallel to the Kx, Ky direction in this technique so that error in trajectory can be a cause of image artifact. In this study, we developed two types of real-time gradient measurement systems, one is pick-up coil based and the other is NMR probe based as field change monitoring probes, and evaluated their feasibility. As a result, the latter is revealed to be more accurate and reliable comparing with the former. While, on the former, inexpensive and easy-to-develop system, more improvements can be expected so that further study is necessary.

Free Research Field

MRI物理・工学