Magnetic particle imaging using cooled pickup coil and SQUID pico-voltmeter

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630188
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Measurement engineering
• Research Institution: Kyushu University
• Principal Investigator: ENPUKU KEIJI 九州大学, 超伝導システム科学研究センター, 教授 (20150493)
• Co-Investigator(Kenkyū-buntansha): YOSHISA TAKASHI 九州大学, システム情報科学研究院, 助教 (30380588)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: SQUIDセンサ / 高温超伝導 / ピコボルトメータ / 磁気粒子イメージング / 冷却コイル / 磁気センサ

Outline of Final Research Achievements

We have developed a measurement system utilizing a cooled pickup coil and a SQUID pico-voltmeter for magnetic particle imaging (MPI). The magnetic field noise spectrum of the system was as low as 9 fT at the measurement frequency of 9 kHz. The spatial resolution in MPI was improved by using a gradient field of 0.2 T/m. Using the developed system, we obtained a clear contour map of the signal field from the magnetic particles. Then, the field map was analyzed to estimate the position of magnetic particles. We demonstrated the detection of two MNPs samples located at the depth of 50 mm below the sensor with a spatial resolution of about 10 mm.

Free Research Field

電気電子工学・計測工学