| Budget Amount *help |
¥88,920,000 (Direct Cost: ¥68,400,000、Indirect Cost: ¥20,520,000)
Fiscal Year 2014: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Fiscal Year 2013: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2012: ¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2011: ¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2010: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Outline of Final Research Achievements |
We developed innovative technologies for the next-generation PET scanner utilizing the Multi-Pixel Photon Counters (MPPCs). The key technologies developed here are (i) Depth-Of-Interaction (ii) Magnetic Resonance, and (iii) Time-of-Flight PET imaging techniques. For (i), we invented a novel technique of measuring the 3-D positions of gamma-ray absorption in the scintillators by dual-readout of MPPCs. A virtual 18-ch PET gantry system achieved excellent image resolution of 0.9 mm (FWHM) at the center of FOV, which only slightly degraded to 1.5 mm at the off-center. We also fabricated a compact MRI/PET module designed for small animals that can be used in 4.7 T MRI system. Finally, we designed two front-end ASICs for future PET scanners with Time-Of-Flight (TOF) capability to be coupled with 4×4 MPPC-arrays. We confirmed excellent time resolution of 213 psec for a MPPC pixel, and 489 psec (FWHM) for MPPC-array, as measured using back-to-back 511-keV gamma rays.
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