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Study of TOF PET using Cherenkov light

2011; Elsevier BV; Volume: 654; Issue: 1 Linguagem: Inglês

10.1016/j.nima.2011.06.035

1872-9576

S. Korpar, R. Dolenec, P. Križan, R. Pestotnik, A. Stanovnik,

Radiation Therapy and Dosimetry

This work investigates the possibilities of improving the measurements of arrival time difference of the two 511 keV photons arising from annihilation of a positron in positron emission tomography (PET). The new technique of detecting the prompt Cherenkov light, produced by absorption of the annihilation photon in a suitable crystal, could considerably improve the image quality. A simple apparatus with PbF2 crystals and microchannel plate photomultipliers (MCP PMTs) has been constructed and coincidence resolutions of 71 ps FWHM and 95 ps FWHM have been achieved with 5 and 15 mm thick crystals, respectively. Simulation calculations are in agreement with the experimental findings.