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1 2022

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A double photon coincidence detection method for medical gamma-ray imaging

Uenomachi Mizuki, Shimazoe Kenji, Takahashi Hiroyuki

Bio-Algorithms and Med-Systems

2022

Vol. 18, no. 1

120--126

Cascade nuclides emit two or more gamma rays successively through an intermediate state. The coincidence detection of cascade gamma rays provides several advantages in gamma-ray imaging. In this review article, three applications of the double photon coincidence method are reviewed. Double-photon emission imaging with mechanical collimators and Compton double-photon emission imaging can identify radioactive source positions with their angular-resolving detectors, and reduce the crosstalk between nuclides. In addition, a novel method of coincidence Compton imaging is proposed by taking coincidence detection between a Compton event and a photopeak events. Although this type of coincidence Compton imaging cannot specify the location, it can be useful in multinuclide Compton imaging.