Reconstruction with partially known attenuation information in time of flight positron emission tomography

Reconstruction in positron emission tomography is performed with partially known attenuation. A PET-CT scanner is used to generate a PET image with time of flight emission information. To limit x-ray dose while providing increased sensitivity at the ends of the CT volume in the PET image, attenuation coefficients for oblique LORs passing outside the CT volume are determined from the time of flight emission information. The attenuation coefficients for LORs within the CT volume are derived from the CT data. An objective function may be maximized for the emission distribution without reconstructing the attenuation distribution.

Octrooi-publicatienummer: US9155514

Jaar aanvraag: 2014

Jaar toekenning: 2015

Jaar van publicatie: 2015

Status: Toegewezen

Technologiedomeinen: Computertechnologie, Medische technologie

Gevalideerd voor IOF-sleutel: Ja

Toegewezen aan: Associatie KULeuven, Universitaire Associatie Brussel