Systems and methods for determining correction parameters for imaging devices

A method for determining at least one correction parameter for a Positron Emission Tomography (PET) scanner including a plurality of detector units, implemented on a computing device having at least one processor and at least one non-transitory storage medium, the method comprising:

• for each of the plurality of detector units,
• determining, based on scan data of one or more scans of a phantom at a plurality of positions, a first sum of coincidence events detected by the detector unit, wherein the phantom is moved to the plurality of positions along an axis of a field of view of the PET scanner during the one or more scans, and a length of the phantom is less than a length of the field of view of the PET scanner along the axis;
• and
• determining, based on the first sum of coincidence events, at least one correction parameter associated with the detector unit.

A non-transitory computer readable medium, comprising at least one set of instructions, wherein when executed by at least one processor of a computing device, the at least one set of instructions direct the at least one processor to perform operations including:

• for each line of response (LOR) of a plurality of lines of response (LORs) associated with the plurality of detector units,
• determining, based on scan data of one or more scans of a phantom at a plurality of positions, a first sum of coincidence events on the LOR, wherein the phantom is moved to the plurality of positions along an axis of a field of view of the PET scanner during the one or more scans, and a length of the phantom is less than a length of the field of view of the PET scanner along the axis;
• and
• determining, based on the first sum of coincidence events, at least one correction parameter associated with the LOR.