System and method for attenuation correction of phantom images
AssigneeGeneral Electric Company
InventorsTIMOTHY WAYNE DELLER, MICHAEL LEE SPOHN, SONAL AMBWANI
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Abstract
A method for attenuation correction of a phantom image in a PET imaging system includes obtaining raw scan data of a scanned phantom, a non attenuation corrected template image of a stock phantom of like type to the scanned phantom, and an attenuation map of the stock phantom. The method further includes generating a non-attenuation corrected raw image of the scanned phantom based on the raw scan data, registering the template image and attenuation map to the raw image through a rigid image transform, and applying the registered attenuation map to the raw scan data to enable reconstruction of an attenuation corrected final image.
Claims18
A method for attenuation correction of a phantom image in a PET imaging system comprising:
- obtaining raw scan data;
- generating from the raw scan data a non-attenuation corrected raw image of a scanned phantom;
- obtaining a non attenuation corrected template image of a stock phantom and an attenuation map of the stock phantom, the stock phantom of like type to the scanned phantom;
- registering the template image and attenuation map to the raw image through a rigid image transform;
- and
- applying the registered attenuation map to the raw scan data to enable reconstruction of an attenuation corrected final image.
A PET imaging system comprising:
- a detector ring configured to produce signals indicating the detection of photons produced by positron-electron recombination;
- a processor connected in communication with the detector ring;
- and
- wherein the processor is configured to obtain a non attenuation corrected template image of a stock phantom;
- to obtain an attenuation map of the stock phantom;
- to generate a raw non-attenuation corrected image of a scanned phantom of like type to the stock phantom;
- to register the template image and attenuation map to the raw image;
- and to generate an attenuation corrected final image from the raw scan data, using the registered attenuation map.
A processor for communication with a detector ring that produces signals indicating the detection of photons from positron-electron recombination, wherein the processor is configured to:
- receive as raw scan data the signals produced by the detector ring;
- generate a non-attenuation corrected raw image of a scanned phantom inserted through the detector ring, based on the raw scan data;
- obtain a non attenuation corrected template image of a stock phantom and to obtain a computer model of the stock phantom, which is of like type to the scanned phantom;
- register the computer model of the stock phantom to the raw image using a rigid image transform;
- and
- generate an attenuation corrected final image from the raw image, using the computer model of the stock phantom.
Dependencies are inferred from the claim text.