New device for real-time temperature measurement during 3T-MR under the temperature rise associated with SAR: aiming for the development of rapid-sequence cardiac MR for rehabilitation patients

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K12574
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Tohoku University
• Principal Investigator: CHIDA Koichi 東北大学, 災害科学国際研究所, 教授 (20323123)
• Co-Investigator(Renkei-kenkyūsha): KOHZUKI Masahiro 東北大学, 大学院医学系研究科, 教授 (70234698)
• Research Collaborator: NAGASAKA Tatsuo 東北大学, 大学病院, 副診療放射線技師長
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 心臓リハビリテーション / 磁気共鳴診断（ＭＲI）検査

Outline of Final Research Achievements

Cardiac MRI, including that of rehabilitation patients, is a valuable non-invasive source of information on cardiac function. However, cardiac MR requires long examination times, which many rehabilitation patients cannot tolerate. Although 3T-MR was expected to facilitate shorter examination times, long examination times are still required due to the temperature rise associated with the SAR. This study describes the development of a new real-time temperature measurement device for MR, and our motivation is the expansion of short-duration MR sequences for cardiac rehabilitation patients.
Our measurement system consists of non-magnetic thermocouple sensors, an electromagnetically shielded cable, and a display. The sensors and cables of the new thermometer resulted in almost no artifacts on MR images. The thermometer presented here is an effective tool for real-time temperature measurement during MR. Our measurement methods will aid the development of short-duration cardiac MR sequences.

Free Research Field

放射線科学