CN104027892A - Novel high-resolution portal imaging system - Google Patents
Novel high-resolution portal imaging system Download PDFInfo
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- CN104027892A CN104027892A CN201310671701.3A CN201310671701A CN104027892A CN 104027892 A CN104027892 A CN 104027892A CN 201310671701 A CN201310671701 A CN 201310671701A CN 104027892 A CN104027892 A CN 104027892A
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Abstract
The invention relates to a novel high-resolution portal imaging system, belongs to the field of medical instruments, and is applied to tumor radiotherapy. The novel high-resolution portal imaging system comprises a multi-blade collimator comprising multiple blades which are installed in a box body. The box body is installed on a slide block of a linear guide rail and can move along the linear guide rail. Each blade can move along blade guide grooves of the box body. The box body moves in a dragging way via a leading screw transmission mechanism. The blades move in the dragging way via leading screw nuts. A required portal shape is formed by positions of the multiple blades and the box body via positioning and controlling, and dimension of a dose calculation matrix unit of the portal imaging system is 2.5mm*2.5mm. The novel high-resolution portal imaging system is characterized in that the blades comprise a group of intermediate blades, a second group of blades and a third group of blades. The second group of blades are arranged at the two sides of the group of intermediate blades. The third group of blades are arranged at the two sides of the second group of blades. The novel high-resolution portal imaging system has characteristics of being high in performance, low in cost and high in practicality.
Description
Technical field
The present invention relates to a kind of novel high-resolution launched field formation system, belong to medical instruments field, for the radiotherapy of tumor.
Background technology
The launched field that conventional medical accelerator produces is square field or rectangle launched field; but tumor shape varies again; in order to protect better the normal structure of tumor periphery; early clinic is made the consistent block of hole shape according to tumor shape and is carried out beam shaping; this method wastes time and energy; and the block that adopts forging type to make is meticulous not, and its advantage is disposable apparatus small investment, can manufacture the block of arbitrary shape.Now clinical is mainly multi-diaphragm collimator for tumour radiotherapy launched field former, multi-diaphragm collimator is comprised of many heavy metal flake alignment, each blade self-movement, utilize the diverse location of a plurality of blades can surround the beam hole shape needing, the vane thickness of multi-diaphragm collimator has determined the fine degree that launched field is shaped, blade is thinner, and resolution is higher.
According to the size of the difference of existing multi-diaphragm collimator vane thickness and launched field, be divided into several.40 pairs of blades, each projecting blade 10mm multi-diaphragm collimator; Be 60 pairs of blades, intermediate blade group projecting blade is 5mm, and outside vane group projecting blade is 10mm; Be 80 pairs of blades, all projecting blades are 5mm; Also have a kind of vane thickness to be less than the miniature multi-diaphragm collimator that is referred to as of 5mm, be mainly used in radiosurgery treatment and use.
Existing 40 pairs of blade multi-diaphragm collimator resolution are modal 10mm, and cost is lower, but relatively low for little oncotherapy resolution; 60 pairs of blade multi-diaphragm collimators, zone line resolution improves, but the corresponding only 200mm of center irradiation area that waits of 5mm resolution, the target area such as nasopharyngeal carcinoma, cervical cancer is all greater than 200mm conventionally, and centre and outside blade resolution gap excessive; 80 pairs of blade multi-diaphragm collimators, All Ranges resolution improves, but cost and fault rate all improve.Its vane thickness of the multi-diaphragm collimator also having on market mates with accelerator installation site and dosage compute matrix unit size, and its launched field size and vane thickness are more random, and the accuracy of accelerator output treatment plan calculating dosage is poor.Based on this, how to overcome the shortcoming of existing 40 pairs, 60 pairs, 80 pairs blade multi-diaphragm collimators, the advantage that simultaneously retains existing several different schemes, provides a kind of low cost, high performance high-resolution launched field formation system technical solution, is subject matter to be solved by this invention.
Summary of the invention
According to above deficiency of the prior art, the technical problem to be solved in the present invention is: a kind of a kind of low cost, high performance high-resolution launched field formation system of providing is provided.
Novel high-resolution launched field formation system provided by the present invention, comprise multi-diaphragm collimator, multi-diaphragm collimator comprises a plurality of blades, blade installation is in casing, casing is arranged on the slide block of line slideway, can move along line slideway, each blade can move along the blade guide groove of casing, casing drags by lead-screw drive mechanism, blade pass is crossed feed screw nut and is dragged, by a plurality of blades, the location positioning of casing is controlled and is formed the launched field shape needing, and the Rapid Dose Calculation matrix unit of launched field formation system is of a size of 2.5mm*2.5mm, it is characterized in that, one group of blade in the middle of described blade comprises, second group of blade and the 3rd group of blade, one group of blade both sides in the middle of second group of blade is arranged on, the 3rd group of blade is arranged on the both sides of second group of blade, step resolution and the central projection thickness of middle one group of blade are the twice of Rapid Dose Calculation matrix unit size, the step resolution of second group of blade and central projection thickness are three times of Rapid Dose Calculation matrix unit size, the step resolution of the 3rd group of blade and central projection thickness are four times of Rapid Dose Calculation matrix unit size.
Described multi-diaphragm collimator vane travels scope is 180～200 millimeters.
The beneficial effect that the present invention has is, high-performance.Novel high-resolution launched field formation system adopts 30 couples of 5mm, 20 couples of 7.5mm, 10 pairs of 10mm blade combinations, and 5mm step resolution region is 150mm, and 7.5mm step resolution region is 75mm * 2, and whole region is 50mm * 2.This blade arrangement design can provide the meticulousst launched field shaping resolution at 150mm with interior tumor for size, for size, at 300mm, with interior tumor, can provide medium meticulous launched field shaping resolution, for the tumor that is greater than 300mm, provide conventional launched field shaping resolution.Each vane thickness is the integral multiple of Rapid Dose Calculation matrix unit, has guaranteed the accuracy of accelerator output treatment plan calculating dosage, without extra systematic error.
Low-cost.Novel high-resolution launched field formation system, adopts 60 pairs of blades equally, and in the situation that better resolution is provided, cost is substantially constant.But compare with 80 pairs of blade multi-diaphragm collimators, there is obvious cost advantage, and because element reduces, reliability also can be improved.
Practical.The blade arrangement design of novel high-resolution launched field formation system meets the less meticulousr principle of launched field envelope that requires of tumor clinically.Existing 60 pairs of multi-diaphragm collimators on market, for the tumor between 200-300mm, can provide better launched field shaping resolution relatively, and as nasopharyngeal carcinoma, prostate, cervical cancer, these tumor irradiation areas are generally all greater than 200mm.With respect to existing 80 pairs of multi-diaphragm collimators on market, although the 80 pairs of whole region of multi-diaphragm collimator launched field shaping resolution are all improved, the most blades in outside do not participate in launched field shaping conventionally, causing idle waste.
Accompanying drawing explanation
Fig. 1 is multi-diaphragm collimator position view;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is the Rapid Dose Calculation matrix unit schematic diagram of therapy plot software
Fig. 4 is multi-diaphragm collimator vane group layout viewing;
Fig. 5 is the launched field shape schematic diagram that multi-diaphragm collimator blade forms;
In figure: 1, multi-diaphragm collimator; 2, blade; 3, middle one group of blade; 4, second group of blade; 5, the 3rd group of blade; 6, launched field shape; 7, Rapid Dose Calculation matrix unit; 8, casing; 9, line slideway; 10, slide block; 11, lead-screw drive mechanism; 12, feed screw nut; 13, radiation source; 14, the center aspect such as.
The specific embodiment:
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
Novel high-resolution launched field formation system as shown in Figure 1, can form the Irregular field at directed patient exposure position, comprise multi-diaphragm collimator 1, multi-diaphragm collimator 1 comprises a plurality of blades 2, blade 2 is arranged in casing 8, casing 8 is arranged on the slide block 10 of line slideway 9, can move along line slideway 10, each blade 2 can move along the blade guide groove of casing 8, casing 8 drags by lead-screw drive mechanism 11, blade 2 drags by feed screw nut 12, by a plurality of blades 2, the location positioning of casing 8 is controlled and is formed the launched field shape 6 needing, and the Rapid Dose Calculation matrix unit 7 of launched field formation system is of a size of 2.5mm*2.5mm, one group of blade 3 in the middle of described blade 2 comprises, second group of blade 4 and the 3rd group of blade 5, one group of blade 3 both sides in the middle of second group of blade 4 is arranged on, the 3rd group of blade 5 is arranged on the both sides of second group of blade 4, middle one group of blade 3 is waiting center that the step resolution of 5 millimeters can be provided, it is the twice of Rapid Dose Calculation matrix unit 7 sizes, second group of blade 4 is in the both sides of middle one group of blade 3, waiting center that the step resolution of 7.5 millimeters is provided, be three times of Rapid Dose Calculation matrix unit 7 sizes.Described novel high-resolution launched field formation system, the 3rd group of blade 5, in the both sides of second group of blade 4, is also outermost one group, waiting center that the step resolution of 10 millimeters is provided, four times of Rapid Dose Calculation matrix unit 7 sizes.The blade numerical digit 30 of middle one group of blade 3, the blade numerical digit 20 of second group of blade 42, the number of blade of the 3rd group of blade 5 is 1, and concrete arrangement mode is the central projection thickness such as the 5 * 10mm-10 * 7.5mm-30 * 5mm-10 * 7.5mm-5 * 10mm(number of blade * blade).
Multi-diaphragm collimator 1 is between radiation source 13He Deng center aspect 14, the partial radiation energy of radiation source 13 can be thrown and center aspect 14 places such as be shone by multi-diaphragm collimator 1, wherein multi-diaphragm collimator 1 comprises a plurality of blades, and each blade is removable, and launched field shape is formed by a plurality of blade positioning control.Radiation source 13 is positioned at approximately 1000 millimeters, Ju Deng center distance.
Blade 2 travel range of multi-diaphragm collimator 1 are 180～200 millimeters, and approximately 300 millimeters * 400 millimeters treatment areas can be provided.
Claims (2)
1. a novel high-resolution launched field formation system, comprise multi-diaphragm collimator, multi-diaphragm collimator comprises a plurality of blades, blade installation is in casing, casing is arranged on the slide block of line slideway, can move along line slideway, each blade can move along the blade guide groove of casing, casing drags by lead-screw drive mechanism, blade pass is crossed feed screw nut and is dragged, by a plurality of blades, the location positioning of casing is controlled and is formed the launched field shape needing, and the Rapid Dose Calculation matrix unit of launched field formation system is of a size of 2.5mm*2.5mm, it is characterized in that, one group of blade in the middle of described blade comprises, second group of blade and the 3rd group of blade, one group of blade both sides in the middle of second group of blade is arranged on, the 3rd group of blade is arranged on the both sides of second group of blade, step resolution and the central projection thickness of middle one group of blade are the twice of Rapid Dose Calculation matrix unit size, the step resolution of second group of blade and central projection thickness are three times of Rapid Dose Calculation matrix unit size, the step resolution of the 3rd group of blade and central projection thickness are four times of Rapid Dose Calculation matrix unit size.
2. novel high-resolution launched field formation system according to claim 1, is characterized in that, described multi-diaphragm collimator vane travels scope is 180～200 millimeters.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107961447A (en) * | 2016-10-20 | 2018-04-27 | 上海东软医疗科技有限公司 | The preparation method and device of a kind of radiotherapy planning |
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| CN102247660B (en) * | 2011-04-18 | 2016-06-01 | 深圳市海博科技有限公司 | The reverse planing method for the treatment of plan and treatment planning systems |
| CN102915784B (en) * | 2012-08-24 | 2016-08-03 | 山东新华医疗器械股份有限公司 | Double-layer multi-blade collimator |
| CN203620097U (en) * | 2013-12-07 | 2014-06-04 | 山东新华医疗器械股份有限公司 | Novel high-resolution radiation field forming system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107961447A (en) * | 2016-10-20 | 2018-04-27 | 上海东软医疗科技有限公司 | The preparation method and device of a kind of radiotherapy planning |
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