Radiation delivery system in a medical apparatus for orthovoltage radiation therapy
Radiation therapy delivery system, including X-ray source, magnetic body rotation fixation node and/or mechanical body rotation fixation node; filter unit with a plurality of filters and a plug that circle a cylindrical element; drive unit for rotating filter unit; collimation elements in a collimation unit body, that includes collimation element fixation device and collimation photoelectric identification system; and processor controlling the filter unit to adjust X-ray filtration characteristics. The filter unit includes filter photoelectric identification system, controller, and photoelectric sensors. The cylindrical element includes slits located on rings that run along outer surface. Photoelectric sensors are triggered by a light beam that passes through the slits to identify/position filters. First ring with first photoelectric sensor identifies zero position of the filter, second ring with second photoelectric sensor identifies filter working positions, and third ring with a set of slits for each filter, and third photoelectric sensor for filter identification.
1. A radiation delivery system in a medical apparatus for radiation therapy, comprising:
an X-ray generator module;
a filter unit with a plurality of filters arranged on a cylindrical element, wherein one of the filters is a lead X-ray blocker,
wherein the X-ray generator module is inside the cylindrical element;
a drive unit for rotating the filter unit;
a removable collimator having a photoelectric identification encoding for identifying the collimator; and
a processor producing control signals to the drive unit for rotating the filter unit,
wherein the filter unit includes a filter photoelectric identification system and photoelectric sensors,
wherein the cylindrical element includes slits located on rings that run along its outer surface, and
wherein the photoelectric sensors are located so as to be triggered by a light beam that passes through the slits in order to identify and/or to position the filters,
wherein a first ring with a first photoelectric sensor identifies a zero position of the filter in the filter unit, a second ring with a second photoelectric sensor identifies a working positions of the filters, and a third ring with a set of slits for each filter, and including a third photoelectric sensor, is used for filter type identification,
wherein a number of ring combinations defines a maximum number of filters.
2. The system of claim 1 , wherein the filters have spherical shapes, their segmented surface area is S s =2πRH from X to Y cm 2 .
3. The system of claim 1 , wherein the cylindrical element is drum-shaped, and wherein the cylindrical element includes two rolling bearings and connected with a gear motor of the drive unit capable of rotating the filter unit via a gear train.
4. The system of claim 1 , wherein the X-ray generator includes a magnetic body rotation fixation node that comprises a clamping handle, a right drive axle with a handle rotation limiter, a left drive axle, a right clamp and a left clamp that come into contact with a braking surface of its body with an X-ray tube of the X-ray generator, and wherein the magnetic rotation fixation node comprises electromagnets and/or an electromagnetic clutch.
5. The system of claim 1 , wherein the collimator includes a lock fixed on a center axis of a filter that is currently aligned, and wherein the collimator also includes a conical guide and an eccentric mechanism with an eccentric located on a rotation handle axis.
6. The system of claim 5 , wherein the photoelectric identification encoding of the collimator has unique collimation element identification codes, and each collimation element has a unique set of cylindrical rings, which are functionally coupled with the photoelectric sensors via the processor.
7. The system of claim 6 , wherein the photoelectric identification encoding is functionally coupled to the processor for displaying parameters of the system onto a monitor screen and is also adapted to provide the X-ray beam with a predetermined energy.