제목: The non-neuronal signal in functional MRI data and its correction

연사: 신완용 교수님 (Cleveland Clinic)

일시: 8월 17일 (수) 11-12시

초록: Neuronal activation can be measured using magnetic resonance imaging (MRI)-based blood oxygenation level dependent (BOLD) contrast. However, BOLD contrast is known to be impacted by non-neuronal signal sources. The physiologic respiratory and cardiac signals have been identified as a primary non-neuronal source of variance. The head motion during fMRI data acquisition is known to be not only non-neuronal signal but also the bias source to produce the signal fluctuation to deflect the statistical result.

The seminar has two parts. 1) The physiologic signals reflected on fMRI data is discussed, and the method to remove the physiologic components without the external physio-measures is presented. 2) The head motion is injected on ex-vivo brain phantom in volume-and slice-wisely using a home built sequence, and the slicewise-motion correction method is presented to be compared to a conventional volume motion correction method.