Methods and systems for scatter correction

A method for NM imaging, comprising:

• acquiring, with a plurality of detectors, imaging data separated into a high energy window and a low energy window;
• reconstructing a first image from the imaging data in the high energy window with a low resolution;
• reconstructing a second image from the imaging data in the low energy window with a low resolution;
• correcting the second image according to a photopeak photon distribution known from the first image to obtain a scattered photon distribution image;
• correcting the imaging data based on the scattered photon distribution image;
• and
• outputting a scatter-corrected image reconstructed from the corrected imaging data.

A system, comprising:

• a detector array including a plurality of detectors;
• and
• a computing device communicatively coupled to the detector array and configured with instructions in non-transitory memory that when executed cause the computing device to:
• acquire, via the detector array, imaging data separated into a high energy window and a low energy window;
• remove photopeak photons from the imaging data in the low energy window to obtain a corrected scatter distribution;
• correct the imaging data based on the corrected scatter distribution;
• and
• output a scatter-corrected image reconstructed from the corrected imaging data.