Blade group, linkage type multi-blade collimator and linkage method of linkage type multi-blade collimator
A multi-leaf collimator and blade set technology, applied in the directions of radiotherapy, X-ray/γ-ray/particle irradiation, treatment, etc. quantity etc.
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Embodiment 1
[0038] like figure 1 As shown, this embodiment provides a blade set, which is used in a multi-leaf collimator, including two active blades 1 and a number of driven blades 2 for shielding rays when stretching, and a number of driven blades 2 are arranged in a Between the two driving blades 1 , and the thickness of each driven blade 2 is smaller than that of the driving blade 1 .
[0039] During the working process, the active vane 1 and the driven vane 2 protrude from the boundary of the simulated target area to block the X-rays, so that the X-rays can perform radiation therapy on the set area; since the thickness of the driven vane 2 in this embodiment is smaller than that of the active vane 1. When the active blade 1 and the driven blade 2 form a boundary curve, the curve is smoother than the boundary shape formed by the blades in the prior art, and can improve the accuracy of field modulation and further narrow the gap between the irradiation area and the target area The ga...
Embodiment 2
[0043] This embodiment provides a linkage type multi-leaf collimator, which includes a body and several above-mentioned blade groups, and several blade groups are symmetrically arranged on the body, and a drive for driving the driving blade 1 and the driven blade 2 to slide is also provided on the body components.
[0044] The manner in which the blade set is fixed on the body is well known to those skilled in the art, therefore, this embodiment does not limit the way of sliding and fixing the blades.
[0045] Specifically, the driving assembly includes a driving device, a rigid wire 5 and a tightening device 6, the driving blades 1 are respectively connected to the driving device, and the driving blade 1 and the driven blade 2 are respectively provided with a first hole for the rigid wire 5 to pass through. A threading portion and a second threading portion; one end of the rigid line 5 is fixed, and the other end passes through the first threading portion on one side, some se...
Embodiment 3
[0056] This embodiment provides a linkage method of a linkage type multi-leaf collimator, including the following steps:
[0057] 1) Obtain the boundary curve of the target area that needs to be irradiated with X-rays, and correspondingly generate the boundary curve of the irradiation field;
[0058] 2) Analyzing and calculating the irradiation field, obtaining the movement process of each active blade 1, and generating control programs for several driving devices;
[0059] 3) A number of drive motors 3 are controlled by the control system to drive the active blade 1 to extend to the set position, and drive the adjacent driven blade 2 to move through the rigid line 5 to block the X-rays to form an irradiation field.
[0060] In this embodiment, the process of analyzing the boundary curve and obtaining the control program of the driving device according to the boundary curve is a routine skill mastered by those skilled in the art.
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