| 主权项 |
1. A cone beam computed tomography (CBCT) system for scanning of a subject, comprising:
a gantry having a rotatable cylindrical frame supported by a base frame, wherein a central rotational axis of the cylindrical frame is substantially horizontal, and a cone beam X-ray source and an X-ray detector are attached to the cylindrical frame,
wherein the cylindrical frame comprises at least two circular rails, the rails each having a radial surface-guide and an axial surface-guide, and wherein the rails are positioned orthogonal to the axis of rotation and substantially parallel to each other, andwherein a plurality of radial rotary bearings and at least, two axial rotary bearings are mounted to the base frame, wherein the radial rotary bearings permit radial adjustment of the cylindrical frame, and wherein the radial and axial rotary bearings rotatably support the cylindrical frame in a constant axial and radial position,whereby the CBCT system acquires three-dimensional X-ray tomographic information by scanning the subject in a single revolution of the cylindrical frame; andwherein the CBCT system comprises electrical cables and a cable winding-unwinding system fixed to the support frame for winding and unwinding the electrical cables and including a cable carrier and a counterweight. |
