Simultaneous imaging using Si-PM-based PET and MRI for development of an integrated PET/MRI system

Seiichi Yamamoto*, Tadashi Watabe, Hiroshi Watabe, Masaaki Aoki, Eiji Sugiyama, Masao Imaizumi, Yasukazu Kanai, Eku Shimosegawa, Jun Hatazawa

*この研究の対応する著者

研究成果: Article査読

57 被引用数 (Scopus)

抄録

The silicon photomultiplier (Si-PM) is a promising photo-detector for PET for use in magnetic resonance imaging (MRI) systems because it has high gain and is insensitive to static magnetic fields. Recently we developed a Si-PM-based depth-of-interaction PET system for small animals and performed simultaneous measurements by combining the Si-PM-based PET and the 0.15 T permanent MRI to test the interferences between the Si-PM-based PET and an MRI. When the Si-PM was inside the MRI and installed around the radio frequency (RF) coil of the MRI, significant noise from the RF sequence of the MRI was observed in the analog signals of the PET detectors. However, we did not observe any artifacts in the PET images; fluctuation increased in the count rate of the Si-PM-based PET system. On the MRI side, there was significant degradation of the signal-to-noise ratio (S/N) in the MRI images compared with those without PET. By applying noise reduction procedures, the degradation of the S/N was reduced. With this condition, simultaneous measurements of a rat brain using a Si-PM-based PET and an MRI were made with some degradation in the MRI images. We conclude that simultaneous measurements are possible using Si-PM-based PET and MRI.

本文言語English
ページ(範囲)N1-N13
ジャーナルPhysics in Medicine and Biology
57
2
DOI
出版ステータスPublished - 2012 1月 21
外部発表はい

ASJC Scopus subject areas

  • 放射線技術および超音波技術
  • 放射線学、核医学およびイメージング

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