Meeting Banner
Abstract #3088

Dynamic off-resonance magnetic field monitoring and correction using proton field probes

Ying-Hua Chu 1 , Yi-Cheng Hsu 1 , Shang-Yueh Tsai 2 , Wen-Jui Kuo 3 , and Fa-Hsuan Lin 1

1 Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan, 2 National Chengchi University, Taipei, Taiwan, 3 National Yang Ming University, Taipei, Taiwan

Here we develop a 10-channel field probe system using 1H as the NMR signal source to monitor the magnetic field. The field probe is decoupled from the subject by interleaving the field probe measurement and subject imaging. Specifically, field probe NMR signal was measured at high spatial frequency k-space point in order to minimize the NMR signal from the subject. Empirical data showed successful monitoring of respiratory and cardiac cycles. We can track 2D field drifting with 0.1 s temporal resolution and use this information to improve the time-domain SNR (tSNR) of dynamic spiral imaging by 137 %.

This abstract and the presentation materials are available to members only; a login is required.

Join Here