Methods and devices for generating sampling masks related to imaging

A system for grading a medical image for acquiring a visualization of a target, the system comprising:

• a mask generating module configured to generate a first sampling mask;
• a k-space data acquiring module configured to acquire first k-space data of the target at a first phase using the first sampling mask;
• and
• an image generating module configured to generate a first image of the target based at least in part on the first k-space data;
• wherein the mask generating module is further configured to generate a second sampling mask using a model based at least in part on one selected from the first sampling mask, the first k-space data, and the first image;
• wherein the k-space data acquiring module is further configured to acquire second k-space data of the target at a second phase using the second sampling mask;
• and
• wherein the image generating module is further configured to generate a second image of the target based at least in part on the second k-space data.

A non-transitory computer-readable medium with instructions stored thereon, that when executed by a processor, perform the processes of:

• generating a first sampling mask;
• acquiring first k-space data of a target at a first phase using the first sampling mask;
• generating a first image of the target based at least in part on the first k-space data;
• generating a second sampling mask using a model based on at least one selected from the first sampling mask, the first k-space data, and the first image;
• acquiring second k-space data of the target at a second phase using the second sampling mask;
• and
• generating a second image of the target based at least in part on the second k-space data.