Online angle selection in rotational imaging and tracking systems

A computer-readable medium comprising instructions that when executed by a process device, cause the processing device to:

• select at least a first angle and a second angle from a set of angles for a first rotation of a gantry of a radiation apparatus, wherein the first angle is selected from the set of angles based on having a tracking quality metric value satisfying a tracking quality metric criterion, wherein the tracking quality metric value includes a numerical value representing a confidence that a target is trackable based on images generated at the first angle, and wherein the tracking quality metric criterion includes a numerical threshold;
• generate, using an imaging device mounted to the gantry, a first tracking image of the target from the first angle during the first rotation of the gantry;
• and
• generate, using the imaging device, a second tracking image of the target from the second angle during the first rotation of the gantry.

A method of operating a radiation apparatus, the method comprising:

• selecting at least a first angle from a set of angles for a first rotation of a gantry of a radiation apparatus, wherein the first angle is selected from the set of angles based on having a tracking quality metric value satisfying a tracking quality metric criterion, wherein the tracking quality metric value includes a numerical value representing a confidence that a target is trackable based on images generated at the first angle, and wherein the tracking quality metric criterion includes a numerical threshold;
• generating, using an imaging device mounted to the gantry, a first tracking image of the target from the first angle during the first rotation of the gantry;
• and
• performing target tracking based on the first tracking image.