noun
magnetoencephalogram
Medical term for a recording of brain activity obtained by magnetoencephalography (MEG).
医師は患者の脳磁図を解析して、てんかんの焦点を特定した。
The doctor analyzed the patient's magnetoencephalogram to identify the epileptic focus.
脳磁図計 is the device (magnetoencephalograph) used to obtain a 脳磁図.
Compound of 脳 (brain), 磁 (magnetism), and 図 (diagram/chart). A modern technical term.