Host: ISCIE, SICE, JSME, JSPE, JSASS, SCEJ
Co-host: Technically Cosponsored by 48 Societies and Institutes
MRI(Magnetic Resonance Imaging) device is medical equipment which has been used to obtain the cross-sectional image of the human body. An open-configuration MR system is introduced at Shiga University of Medical Science in order to conduct microwave coaguration therapy by using near-real-time MR images. MR systems generate a serious noise (about 105dBSPL). Hence, operators and other medical staff (ex. nurses and anesthesists) are exposed to the large MR noise for many hours and cannot communicate with each other. This is an elevated risk of the operation. We therefore attempt to implement an active noise control (ANC) system in order to reduce the MR noise. However, MRI device generates too intense magnetic field for dynamic acoustic equipment. To solve this problem, we have proposed a head-mounted ANC system using piezoelectric loud speakers and optical microphones. In this paper, the cancellation performance of the head-mounted ANC system is demonstrated through some experimental results in order to prove the availability of the system in magnetic field.
