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RECONSTRUCTION D'IMAGES TEP EN TEMPS DE VOL (TOF) À L'AIDE DE NOYAUX LOCALEMENT MODIFIÉS
RECONSTRUCTION D'IMAGES TEP EN TEMPS DE VOL (TOF) À L'AIDE DE NOYAUX LOCALEMENT MODIFIÉS
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摘要
An imaging device (1) includes a positron emission tomography (PET) scanner (10) including radiation detectors (12) and coincidence circuitry for detecting electron-positron annihilation events as 511 keV gamma ray pairs defining lines of response (LORs) with each event having a detection time difference At between the 511 keV gamma rays of the pair. At least one processor (30) is programmed to reconstruct a dataset comprising detected electron-positron annihilation events acquired for a region of interest by the PET scanner to form a reconstructed PET image wherein the reconstruction includes TOF localization of the events along respective LORs using a TOF kernel having a location parameter dependent on At and a TOF kernel width or shape that varies over the region of interest. A display device (34) is configured to display the reconstructed PET image.
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