Patent ID: 11893662
Assignee: NORTHWESTERN UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  A | IPC G

Claim 5:
6. An imaging system comprising:
a sensor configured to receive imaging data, wherein the imaging data comprises projection data for a computed tomography (CT) scan, a single-photon emission computerized tomography (SPECT) scan, or a positron emission tomography (PET) scan of a patient;
a processor operatively coupled to the sensor and configured to:
identify a degree of interaction between measured points of the projection data located at a radius from a center of a projection space;
determine, based at least in part on the degree of interaction between the measured points, density weights for a density compensation filter;
apply the density compensation filter to the projection data to generate filtered projection data; and
convert the filtered projection data from a polar coordinate system to a Cartesian coordinate system by way of gridding, wherein the conversion results in filtered and gridded projection data; and
perform a transform to generate a CT image, a SPECT image, or a PET of the patient based at least in part on the filtered and gridded projection data.