Qualification Test of a MPPC-based PET Module for Future MRI-PET Scanners

Sep 5, 2013, 2:40 PM
Dahlia (B2F) (International Conference Center Hiroshima)

Dahlia (B2F)

International Conference Center Hiroshima

1-5 Nakajima-cho Naka-ku, Hiroshima Japan
ORAL Applications in Space, Medical, Biology, Material Sciences Session 7


Yohta KUREI (Waseda University)


We have developed a high-resolution, compact Positron Emission Tomography (PET) module for future use in MRI-PET scanners. The module consists of large-area, 4 x 4 ch MPPC arrays (Hamamatsu S11827-3344MG) optically coupled with Ce:LYSO scintillators fabricated into 12 x 12 matrices of 1 x 1 mm^2 pixels. At this stage, a pair of module and coincidence circuits was assembled into an experimental prototype gantry arranged in a ring 90 mm in diameter to form the MPPC-based PET system. The PET detector ring was then positioned around the RF coil of the 4.7 T MRI system. We took an image of a point 22Na source under fast spin echo (FSE) and gradient echo (GE), in order to measure interference between the MPPC-based PET and MRI. We only found a slight degradation in the spatial resolution of the PET image from 1.5 to 1.6 mm (FWHM; x-direction), or 1.6 to 1.8 mm (FHWM; y-direction) when operating with the MRI, while the signal-to-noise ratio (SNR) of the MRI image was only degraded by 5%. These results encouraged us to develop a more advanced version of the MRI-PET gantry with eight MPPC-based PET modules, whose detailed design and first qualification test are also presented in this paper.

Primary author

Yohta KUREI (Waseda University)


Jun Kataoka (Waseda University) Prof. Seiichi YAMAMOTO (Nagoya University) Takuya FUJITA (Waseda University) Takuya Kato (Waseda University)

Presentation materials