Systems and methods for optimized iterative image reconstruction

A system for image reconstruction, comprising:

• at least one storage device including a set of instructions;
• 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 an initial image to be processed;
• and
• generating a reconstructed image by performing a plurality of iteration steps on the initial image, one of the plurality of iteration steps including a first optimization operation and a second optimization operation, wherein
• the first optimization operation includes:
• receiving an image to be processed in the iteration step, wherein the image to be processed in the iteration step includes the initial image, or an output of an optimizing model in a previously adjacent iteration step;
• and
• determining an updated image by preliminarily optimizing the image to be processed, wherein the first optimization operation includes an iterative operation, the determining an updated image by preliminarily optimizing the image to be processed includes:
• determining the updated image by optimizing, according to a first loss function, the image to be processed according to the iterative operation until a value of the first loss function satisfies a termination condition;
• the second optimization operation includes:
• determining, using an optimizing model, an optimized image based on the updated image;
• and
• designating the optimized image as a next image to be processed in a next iteration step or designating the optimized image as the reconstructed image.

A non-transitory computer readable medium, comprising executable instructions that, when executed by at least one processor, direct the at least one processor to perform a method, the method comprising:

• obtaining an initial image to be processed;
• and
• generating a reconstructed image by performing a plurality of iteration steps on the initial image, one of the plurality of iteration steps including a first optimization operation and a second optimization operation, wherein
• the first optimization operation includes:
• receiving an image to be processed in the iteration step, wherein the image to be processed in the iteration step includes the initial image, or an output of an optimizing model in a previously adjacent iteration step;
• and
• determining an updated image by preliminarily optimizing the image to be processed, wherein the first optimization operation includes an iterative operation, the determining an updated image by preliminarily optimizing the image to be processed includes:
• determining the updated image by optimizing, according to a first loss function, the image to be processed according to the iterative operation until a value of the first loss function satisfies a termination condition:
• the second optimization operation includes:
• determining, using an optimizing model, an optimized image based on the updated image;
• and
• designating the optimized image as a next image to be processed in a next iteration step or designating the optimized image as the reconstructed image.