Method and apparatus for gate specific MR-based attenuation correction of timed-gated pet studies
AssigneeGeneral Electric Company
InventorsCharles William Stearns, Scott David Wollenweber, David M. Goldhaber
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Abstract
A method for producing an attenuation-corrected time-gated PET image comprising includes obtaining a baseline MR image and a cine MR image of a structure; registering the baseline MR image to the cine MR image to create an image transform; and generating a corresponding cine ACF matrix using the image transform, and time-correlating the ACF matrix to a time-gated PET data set to produce an attenuation-corrected time-gated PET image.
Claims20
A method for producing an attenuation-corrected time-gated PET image comprising:
- obtaining a baseline MR image and a cine MR image of a structure;
- registering the baseline MR image to the cine MR image to create an image transform;
- and
- generating a corresponding cine ACF matrix using the image transform, and time-correlating the ACF matrix to a time-gated PET data set to produce an attenuation-corrected time-gated PET image.
An apparatus for producing an attenuation corrected time-gated PET image, said apparatus comprising:
- a PET-MR scanner;
- a controller connected in communication with the PET-MR scanner, wherein the controller is configured to obtain a baseline MR image, a cine MR image and a time-gated PET data set of a structure;
- and
- an image processor connected in communication with the controller, wherein the image processor is configured to register the baseline MR image to the cine MR image to create an image transform;
- and
- generate a corresponding cine ACF matrix using the image transform, and attenuation correct the time-gated PET data set based on the cine ACF matrix.
A method for attenuation correction of PET imaging in a respiratory-gated PET study, comprising:
- obtaining a baseline MR image suitable for deriving PET attenuation correction factors;
- obtaining a cine MR image during a respiratory cycle, concurrent with the respiratory-gated PET study;
- and
- non-rigidly registering the baseline MR image to the cine MR image in order to produce a registered MR image that corresponds to a PET data set from the respiratory-gated PET study and is usable for deriving attenuation correction factors,
- wherein the registered MR image then is used to form attenuation correction factors for the time-gated PET data set.
Dependencies are inferred from the claim text.