Preceding this image pickup, on the basis of the measurement which it executes portion of the suffering inspection body, energy of the RF pulse which for example is absorbed in the head by estimating accurately in every suffering inspection body, precision of the estimate of SAR furthermore in order to improve, to seek with the signal S h which occurs from the head in the nuclear magnetic resonance imaging device, and the signal S b which, occurs inspection body from the whole suffering to request the ratio with the signal which occurs from the particular head and the signal which occurs suffering inspection body from the whole particular, to calculate the energy E h which is absorbed in the head making use of the ratio of the particular signal, head SARYou estimate.本撮像に先立って実施する計測に基づいて被検体の一部、例えば頭部に吸収されるRFパルスのエネルギーを被検体ごとに正確に見積もることによって、SARの見積もりの精度をさらに向上するために、核磁気共鳴イメージング装置において、頭部から発生する信号Shと被検体全体から発生する信号Sbとを求め、当該頭部から発生する信号と当該被検体全体から発生する信号との比αを求め、当該信号の比を用いて頭部に吸収されるエネルギーEhを求め、頭部SARを見積もる。
