Systems and methods for cross-scattering correction

A system, comprising:

• at least one storage device storing a set of instructions for cross-scattering correction for a dual-source or multi-source computed tomography (CT) device, wherein the dual-source or multi-source CT device at least includes a first source-detector pair and a second source-detector pair;
• and
• at least one processor configured to communicate with the at least one storage device, wherein when executing the set of instructions, the at least one processor is configured to direct the system to perform operations including:
• obtaining a detection signal curve of a first detector of the first source-detector pair, wherein the detection signal curve is generated based on signal intensities detected by a plurality of detector channels of the first detector at a scanning angle during a dual-source or multi-source scan of a target subject;
• determining a first convolution region based on the detection signal curve;
• determining estimated cross-scattering signal intensities of the plurality of detector channels by performing a convolution operation on the first convolution region using a target kernel, wherein the target kernel characterizes scattering contributions from a second source of the second source-detector pair to the first detector;
• and
• determining corrected signal intensities of the plurality of detector channels by performing a cross-scattering correction on the signal intensities of the plurality of detector channels based on the estimated cross-scattering signal intensities of the plurality of detector channels.

A non-transitory computer readable medium, comprising a set of instructions for cross-scattering correction for a dual-source or multi-source computed tomography (CT) device, wherein the dual-source or multi-source CT device at least includes a first source-detector pair and a second source-detector pair, and when executed by at least one processor, the set of instructions direct the at least one processor to effectuate a method, the method comprising:

• obtaining a detection signal curve of a first detector of the first source-detector pair, wherein the detection signal curve is generated based on signal intensities detected by a plurality of detector channels of the first detector at a scanning angle during a dual-source or multi-source scan of a target subject;
• determining a first convolution region based on the detection signal curve;
• determining estimated cross-scattering signal intensities of the plurality of detector channels by performing a convolution operation on the first convolution region using a target kernel, wherein the target kernel characterizes scattering contributions from a second source of the second source-detector pair to the first detector;
• and
• determining corrected signal intensities of the plurality of detector channels by performing a cross-scattering correction on the signal intensities of the plurality of detector channels based on the estimated cross-scattering signal intensities of the plurality of detector channels.