Calibration devices and position calibration methods for image-guided system, and calibration methods for treatment room positioning system

A calibration method for a treatment room positioning system, wherein the treatment room positioning system is configured to assist in positioning a target region in a treatment system, wherein the calibration method comprises:

• installing a plurality of laser lamps in the treatment room;
• installing a mechanical isocenter jig on a treatment head, wherein the mechanical isocenter jig is preset with a central reference object, and the central reference object is configured as a spatial physical representation of an isocenter position of the treatment system to configure the treatment system;
• installing a laser beam verification phantom on the central reference object, telescoping the treatment head, and moving an isocenter position of the laser beam verification phantom to coincide with the isocenter position of the treatment system;
• wherein the laser beam verification phantom includes three mutually perpendicular surfaces, each surface is preset with a positioning mark and a reflective section opposite to each laser lamp of the plurality of laser lamps, and the positioning mark is adapted to a shape of a laser beam emitted by each laser lamp;
• the laser beam verification phantom is provided with a loading hole, a virtual connection line between the isocenter position of the laser beam verification phantom and the loading hole extends to a central position of the central reference object, and the virtual connection line between the isocenter position of the laser beam verification phantom and the loading hole is configured to be coaxial with a telescopic path of the treatment head;
• activating each laser lamp, so that each laser lamp emits a laser beam toward the laser beam verification phantom along three mutually perpendicular directions, respectively;
• determining whether the laser beam emitted by each laser lamp coincides with the positioning mark of the laser beam verification phantom;
• and whether a laser beam path reflected by the reflective section coincides with the laser beam path emitted by each laser lamp;
• if the laser beam emitted by each laser lamp coincides with the positioning mark of the laser beam verification phantom;
• and a laser beam path reflected by the reflective section coincides with the laser beam path emitted by each laser lamp, not adjusting a laser lamp position of the each laser lamp;
• if one of the laser beam emitted by each laser lamp does not coincides with the positioning mark of the laser beam verification phantom;
• and a laser beam path reflected by the reflective section does not coincides with the laser beam path emitted by each laser lamp, adjusting the laser lamp position of each laser lamp, so that the laser beam emitted by the each laser lamp coincides with the positioning mark of the laser beam verification phantom, and the laser beam path reflected by the reflective section coincides with the laser beam path emitted by each laser lamp.