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Grating system for radiatherapy and its regulation method
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A radiation therapy and grating technology, which is applied in radiation therapy, medical treatment, medical science, etc., can solve the problems of following speed influence, rough conformal field, intensity-modulated conformal field performance and quality discount, etc.
Inactive Publication Date: 2008-10-01
王乔生
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However, the motorized multi-leaf collimator is composed of many independent tungsten alloy sheets and micro-motors overlapping together. First of all, it is limited by its structure and size, and the field of view cannot be exactly consistent with the shape of the tumor. The conformal field is obviously very rough. ;In addition, the thin slices need to move flexibly, therefore, the blades cannot be too close together, which will inevitably cause the leakage of rays through the gap between the blades, which greatly reduces the performance and quality of the intensity-modulated conformal field; Third, the tungsten alloy blade is driven by a stepping motor, and it takes time to move. In the image-guided intensity modulation conformal, it is impossible to adopt a more advanced way of beam following the movement of the organ. Only the treatment bed following technology can be used. The corresponding following speed will be affected
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no. 1 example
[0026] The present invention provides a first embodiment, which will be described in detail below with reference to the accompanying drawings.
[0027] like figure 1 As shown, the grating system for radiotherapy provided by the first embodiment includes: a needle bin 10, a needle bin guide rail 20, tungsten needles 31, 32, 33 and 34 of various specifications (in conjunction with reference to Figure 5 ), needle loading device 40, needle withdrawal device 50. The needle compartment guide rail 20 is in the shape of a ring, on which there is a needle compartment chamber, the needle compartment 10 is installed in the needle compartment chamber, and the movement of the needle compartment guide rail 20 drives the needle compartment 10 to move together. combined reference figure 2 , image 3 and Figure 4 , the needle warehouse 10 is a hexahedron, and its upper and lower surfaces are spherical, and the needle warehouse 10 can also be tile-shaped, that is, its upper and lower sur...
no. 2 example
[0032] The present invention provides a second embodiment, which will be described in detail below with reference to the accompanying drawings.
[0033] like Figure 8 As shown, the radiation therapy grating system provided by the second embodiment includes: four-layer needle magazine rails 21, 22, 23 and 24 of different specifications, needle magazines 11, 12, 13 and 14 of four specifications, four specifications of Tungsten needles 31, 32, 33 and 34 (in conjunction with reference Figure 5 ), needle advancing device 40, needle withdrawing device 50. The guide rails 21 , 22 , 23 and 24 of each layer are ring-shaped, and the guide rails of the four layers are overlapped in the radial direction. see again figure 2 , image 3 and Figure 4 The needle bins used in the second embodiment have a structure similar to that of the first embodiment, and each needle bin is provided with a number of pinholes 101, and the tungsten needles 31, 32, 33 and 34 are detachably mounted on t...
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Abstract
The present invention discloses a kind of gratingsystem for radiotherapy and its regulation method. The gratingsystem for radiotherapy includes a needle bin, a needle bin track, tungsten needles of different sizes, a needle setting unit and a needle withdrawing unit. The needle bin is provided with holes for setting the separable tungsten needles and set on the needle bin track for moving. The needle setting unit and the needle withdrawing unit are set separately on two sides of the needle bin track. The gratingsystem for radiotherapy with honeycomb needle bin matching tungsten needles of different sizes can reach precise fitting and strength regulation.
Description
technical field [0001] The invention relates to a radiotherapy instrument and its adjustment method, in particular to a grating system of the radiotherapy instrument and its adjustment method. Background technique [0002] The method of traditional radiotherapy to achieve stereo conformity and intensity adjustment is that at a certain irradiation position, a conformal radiation field that is basically consistent with the shape of the tumor is formed by a motorized multi-leaf grating according to the shape of the tumor, and then different shapes are used. The intensity conformal irradiation in the thickness direction of the tumor is completed by shrinking the field, and the gradient distribution of the dose intensity is formed by overlapping multiple irradiations, and finally the three-dimensional treatment effect consistent with the tumor shape and dose distribution is achieved. However, the motorized multi-leaf collimator is composed of many independent tungsten alloy sheet...
Claims
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