Sep 7 – 12, 2014
University of Surrey
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Development of a MPPC-based Prototype Gantry for Future MRI-PET Scanners

Sep 10, 2014, 2:00 PM
1h 40m
AP3&4 (University of Surrey)


University of Surrey

Guildford, UK
Poster Presentation Applications in Life Sciences, Biology and Medicine Session 10: Posters 1 (Particle Physics, Pixel Detectors and Lifesciences)


Yohta KUREI (Waseda University)


We have developed a high spatial resolution, compact Positron Emission Tomography (PET) module designed for small animals and intended for use in magnetic resonance imaging (MRI) systems. This module consists of large-area, 4 $\times$ 4 ch MPPC arrays (S11827-3344MF; Hamamatsu Photonics K.K.) optically coupled with Ce-doped (Lu,Y)${}_2$(SiO${}_4$)O (Ce:LYSO) scintillators fabricated into 15 $\times$ 15 matrices of 0.5 $\times$ 0.5 mm${}^{2}$ pixels. We set the temperature sensor (LM73CIMK-0; National Semiconductor Corp.) at the rear of the MPPC acceptance surface, and apply optimum voltage to maintain the gain. The eight MPPC-based PET modules and coincidence circuits were assembled into a gantry arranged in a ring 90 mm in diameter to form the MPPC-based PET system. We have developed two types PET gantry: one made of non-magnetic metal and the other made of acrylonitrile butadiene styrene (ABS) resins. The PET gantry was positioned around the RF coil of the 4.7 T MRI system. We took an image of a point ${}^{22}$Na source under fast spin echo (FSE) and gradient echo (GE), in order to measure the interference between the MPPC-based PET and MRI. The spatial resolution of PET imaging in a transaxial plane of 1 mm or less (FWHM) was achieved in all cases. Operating with PET made of ABS has no effect on MR images, while operating with PET made of non-magnetic metal has a significant detrimental effect on MR images. This paper describes our quantitative evaluations of PET images and MR images, and presents a more advanced version of the gantry for future MRI/DOI-PET systems.

Primary author

Yohta KUREI (Waseda University)


Jun Kataoka (Waseda University) Prof. Seiichi Yamamoto (Nagoya University Graduate School of Medicine) Takanori Taya (Waseda University) Takuya FUJITA (Waseda University) Takuya Kato (Waseda University) Tsubasa Ohshima (Waseda University)

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