Development of Semiconductor PET Scanner with the Ultra High Resolutionof less than 1mm FWHM : Next Generation PET

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The mortality rate for cancer is increasing every year and high resolution PETs which can detect minute cancer are called for now. We developed a semiconductor PET with a spatial resolution of less than 1mm by miniaturizing CdTe semiconductor detectors, while only about 4mm resolution is obtained in the conventional PET using scintillation detectors. It inspires the dawn of super-high resolution PET age. By a mouse experiment with the PET, we could show an FDG picture of 1mm cancers for the first time in the world. Furthermore, we succeeded to develop two-dimensional position sensitive CdTe detectors which provide both high resolution and high sensitivity. Stacking these detectors, we manufactured three-dimensional position sensitive detector blocks and developed a super-high resolution semiconductor PET for humans.