Image-guided radiation therapy

A method, comprising:

• acquiring first images by directing a first imaging beam from a first imaging beam source through a target and to a first imager;
• acquiring second images by directing a second imaging beam from a second imaging beam source through the target and to a second imager;
• generating a radiation treatment beam;
• and
• in response to movement of the target while the radiation treatment beam is on, adjusting at least one of the radiation treatment beam and a position of the target to compensate for the movement while the radiation treatment beam is on and irradiating the target, wherein the movement of the target and the position of the target is determined using the first images and the second images.

A method, comprising:

• receiving first images from a first imager, wherein the first images were acquired by directing a first imaging beam from a first imaging beam source through a target and to the first imager;
• receiving second images from a second imager, wherein the second images were acquired by directing a second imaging beam from a second imaging beam source through the target and to the second imager;
• directing a radiation treatment beam at the target and, while the radiation treatment beam is on, detecting a change in position of the target based on the first images and the second images;
• and
• in response to the change in position of the target, while the radiation treatment beam is on, changing at least one of the radiation treatment beam and the position of the target to cause the radiation treatment beam to intersect the target.