Abstract
MRI systems have technical challenges in interference with metals and high cost because of the use of strong magnetic field. Ultralow-field MRI is an emerging technique enabling measurement of samples containing metals due to low resonant frequencies, as well as saving cost due to its simplified coil system. We developed a compact SQUID system for ultralow-field MRI equipped with a magnetic shield box of 1 × 1 × 1.5 m. Oscillating magnetic fields were applied to the pick-up coil of SQUID from an external coil with a magnetic flux density equivalent to magnetic resonance signals from water of 10 ml. The SQUID successfully detected external magnetic fields of 3.08 × 10
Get full access to this article
View all access options for this article.