Abstract: An apparatus for visualizing a movable radiation source, the apparatus comprising: a radiation angular position sensor arranged for generating an angular position, with respect to a sensor axis, of a radiation source emitting radiations in front of said radiation angular position sensor; a camera having a camera axis distinct from the sensor axis; a light diverter arranged in front of said radiation angular position sensor for diverting toward the camera, light originally emitted in front of said radiation angular position sensor toward the radiation angular position sensor, the light diverter being arranged to not change the direction of radiations emitted in front of said radiation angular position sensor; and a composite image generator arranged for adding to a camera image captured by the camera a radiation source marker at a position derived from said angular position and automatically scaled to the camera image size and resolution.

Abstract: A calibration phantom for radiometric characterization and/or radiotherapy dose calculation of a subject is provided, which includes an ellipsoid base having a primary volume defining a plurality of cylindrical voids, each of said cylindrical voids configured to receive a cylindrical insert having a diameter, wherein the ellipsoid base, the primary volume, and each of said inserts are formed from a tissue substitution material independently selected to approximate a radiological property of an anatomical feature of the subject to which the ellipsoid base, the primary volume, and each of said inserts corresponds, wherein the radiological property of the tissue substitution material, the diameter of each of said inserts, and a location of each of said inserts within the ellipsoid base are selected to mimic beam hardening upon exposure of the calibration phantom to a radiation beam. Optionally, one or more peripheral rings are disposed concentrically about the ellipsoid base.

Abstract: An apparatus for visualizing a movable radiation source, the apparatus comprising: a radiation angular position sensor arranged for generating an angular position, with respect to a sensor axis, of a radiation source emitting radiations in front of said radiation angular position sensor; a camera having a camera axis distinct from the sensor axis; a light diverter arranged in front of said radiation angular position sensor for diverting toward the camera, light originally emitted in front of said radiation angular position sensor toward the radiation angular position sensor, the light diverter being arranged to not change the direction of radiations emitted in front of said radiation angular position sensor; and a composite image generator arranged for adding to a camera image captured by the camera a radiation source marker at a position derived from said angular position and automatically scaled to the camera image size and resolution.