Patent ID: 9155514
Filing Date: 2015-10-13
Classification: A61B,G06T

Abstract:
1. A method for reconstructing in positron emission tomography with partially known attenuation, the method comprising: acquiring, with a computed tomography (CT) scanner, attenuation information for a CT volume of a patient; acquiring, with a positron emission tomography (PET) scanner having a plurality of detectors, time of flight data along lines-of-response from emissions; converting the attenuation information into attenuation coefficients along only a first subset of a plurality of the lines of response, a second sub-set of the lines of response missing attenuation information; reconstructing an image of the patient from the time of flight data including the lines of response of the first and second subsets, the reconstructing being a function of the attenuation coefficients along the lines of response of the first subset and a model of attenuation coefficients along the lines of response of the second subset, the model being a function of the corresponding time of flight data for the lines of response of the second sub-set; and displaying the image.