@misc{oai:repo.qst.go.jp:00064379,
 author = {Nishikido, Fumihiko and Atsushi, Tachibana and Obata, Takayuki and Yoshioka, Shunsuke and Inadama, Naoko and Yoshida, Eiji and Tashima, Hideaki and Suga, Mikio and Murayama, Hideo and Yamaya, Taiga and 錦戸 文彦 and 橘 篤志 and 小畠 隆行 and 吉岡 俊祐 and 稲玉 直子 and 吉田 英治 and 田島 英朗 and 菅 幹生 and 村山 秀雄 and 山谷 泰賀},
 month = {Oct},
 note = {We are developing a PET system integrated with a birdcage RF coil for the PET-MRI. The proposed integrated system is intended to realize a convenient and highly sensitive PET system for simultaneous measurements. The integrated system can be easily replaced to other RF coils for other MRI study. In addition, a small ring diameter of the PET is applied for high sensitivity. In the presented system, PET detectors are placed close to the objective to achieve high sensitivity. Each element of the RF coil is inserted between scintillation crystal blocks inside of the shielding material. We carried out a feasible study for the PET detector integrated with the bird cage RF coil.
 The prototype PET detector consisted of a LGSO crystal (Hitachi Chemical) and a multi-pixel photon counter array (S11064 series, Hamamatsu Photonics K.K.). The detector and its electrical circuit were packaged in an aluminum shielding box. Experiments were carried out with 1.5T MRI (Phillips, INTERA 1.5T Master) and a birdcage type RF-coil. The shielding boxes, with the detector and circuit, were placed in the gap of the RF-coils. In order to reduce noise contamination from outside the MRI room, a band pass filter was applied on the power line of the MPPC. First, influence on the PET detector from MRI was evaluated by comparing energy spectra obtained before and during MRI measurement. Simultaneously, influences on the MRI image from the PET detector were evaluated. Next, the influences of the shielding material for the PET detectors on the magnetic field and RF pulse of MRI were evaluated. Dummy detectors which were simply copper shielding boxes were placed at all gaps of the RF coil and MRI images were evaluated.
 As a result, the PET detector worked in simultaneous measurements the same as it did when the MRI was not operated. The MRI images also were obtained as usual even though the PET detector and the shielding materials was positioned close to the RF coil., IEEE 2011 NSS MIC RTSD},
 title = {Feasibility study for a PET detector integrated with a RF coil for PET-MRI},
 year = {2011}
}