Patent ID: 7132663
Filing Date: 2006-11-07
Classification: A61B,G01T

Abstract:
1. A method of correcting for deadtime losses in a positron emission tomography (PET) medical imaging device having a plurality of detectors at successive locations circumferentially spaced about a viewing area, said method comprising: receiving signals indicative of positron-electron annihilation events occurring along a line of response between pairs of detectors for a plurality of predetermined time segments of data acquisition of said events, each of said predetermined time segments of a duration less than a data frame; calculating a deadtime correction sinogram for each predetermined time segment from data acquired during each respective single time segment; calculating corrected counts in the deadtime correction sinogram for each time segment; combining the corrected counts in the deadtime corrected sinograms to generate an acquisition sinogram; and generating an image from the acquisition sinogram.