In the measurement port of the MRI device, interval can be less crowded mutually, distribution facilities it does the aforementioned PET detector in the PET/MRI one somatotype device which has the RF coil and the multiple PET detectors for MRI, distribution facilities it does between the said PET detectors where the RF coil for aforementioned MRI is adjacent coil element for transmission, at least. Here, interval can be less crowded lap in direction of the aforementioned measurement port, distribution facilities it does the aforementioned PET detector, distribution facilities does the coil element for aforementioned transmission in axial direction of the aforementioned measurement port. Or, at least portion of the aforementioned PET detector, can be less crowded in axial direction of the aforementioned measurement port, it lays out interval, the said distribution facilities it does the coil element for aforementioned transmission, between the PET detectors which are adjacent. Also position of depth direction can the aforementioned PET detector, make the detection possible DOI die detector.MRI装置の測定ポートに、MRI用RFコイルと複数のPET検出器を備えたPET/MRI一体型装置において、前記PET検出器を互いに間隔を空けて配設し、前記MRI用RFコイルの少なくとも送信用コイルエレメントを、隣り合う該PET検出器の間に配設する。ここで、前記PET検出器を前記測定ポートの周方向に間隔を空けて配設し、前記送信用コイルエレメントを前記測定ポートの軸方向に配設する。又は、前記PET検出器の少なくとも一部を、前記測定ポートの軸方向に間隔を空けて配置し、前記送信用コイルエレメントを、該隣り合うPET検出器間に配設する。前記PET検出器を、深さ方向の位置も検出可能なDOI型検出器とすることができる。
