A radiation treatment system comprising: a gantry that is rotatably coupled to a drive stand and is configured to rotate about a bore of the radiation treatment system; a treatment-delivering X-ray source mounted on the gantry and configured to direct treatment X-rays to a target volume disposed in the bore a first imaging X-ray source mounted on the gantry and configured to direct first X-rays through the target volume and toward a first X-ray imager mounted on the gantry; a second imaging X-ray source mounted on the gantry and configured to direct second X-rays through the target volume and toward a second X-ray imager mounted on the gantry; and a processor configured to: cause the gantry to perform a rotation continuously in a first direction, wherein the rotation includes an imaging arc and a treatment arc that follows the imaging arc and starts at a first treatment delivery position; while causing the gantry to rotate through the imaging arc from a first imaging position to the first treatment delivery position, receive first volumetric image data from the first X-ray imager and second volumetric image data from the second X-ray imager; determine a first current location of the target volume based on the first volumetric image data and the second volumetric image data; and in response to a determination that the first current location of the target volume is less than a threshold distance from a planned treatment location, while causing the gantry to rotate through the treatment arc: initiate delivery of a treatment beam of the treatment-delivering X-ray source to the target volume; and continue to cause the gantry to rotate in the first direction from the first treatment delivery position to a second treatment delivery position. a gantry that is rotatably coupled to a drive stand and is configured to rotate about a bore of the radiation treatment system; a treatment-delivering X-ray source mounted on the gantry and configured to direct treatment X-rays to a target volume disposed in the bore a first imaging X-ray source mounted on the gantry and configured to direct first X-rays through the target volume and toward a first X-ray imager mounted on the gantry; a second imaging X-ray source mounted on the gantry and configured to direct second X-rays through the target volume and toward a second X-ray imager mounted on the gantry; and a processor configured to: cause the gantry to perform a rotation continuously in a first direction, wherein the rotation includes an imaging arc and a treatment arc that follows the imaging arc and starts at a first treatment delivery position; while causing the gantry to rotate through the imaging arc from a first imaging position to the first treatment delivery position, receive first volumetric image data from the first X-ray imager and second volumetric image data from the second X-ray imager; determine a first current location of the target volume based on the first volumetric image data and the second volumetric image data; and in response to a determination that the first current location of the target volume is less than a threshold distance from a planned treatment location, while causing the gantry to rotate through the treatment arc: initiate delivery of a treatment beam of the treatment-delivering X-ray source to the target volume; and continue to cause the gantry to rotate in the first direction from the first treatment delivery position to a second treatment delivery position. cause the gantry to perform a rotation continuously in a first direction, wherein the rotation includes an imaging arc and a treatment arc that follows the imaging arc and starts at a first treatment delivery position; while causing the gantry to rotate through the imaging arc from a first imaging position to the first treatment delivery position, receive first volumetric image data from the first X-ray imager and second volumetric image data from the second X-ray imager; determine a first current location of the target volume based on the first volumetric image data and the second volumetric image data; and in response to a determination that the first current location of the target volume is less than a threshold distance from a planned treatment location, while causing the gantry to rotate through the treatment arc: initiate delivery of a treatment beam of the treatment-delivering X-ray source to the target volume; and continue to cause the gantry to rotate in the first direction from the first treatment delivery position to a second treatment delivery position. initiate delivery of a treatment beam of the treatment-delivering X-ray source to the target volume; and continue to cause the gantry to rotate in the first direction from the first treatment delivery position to a second treatment delivery position.