CN201115753Y

CN201115753Y - Radiation therapy device

Info

Publication number: CN201115753Y
Application number: CNU2007201710836U
Authority: CN
Inventors: 谢敏; 盛卓谋; 赵旭明
Original assignee: Haibo Technology Co Ltd Shenzhen
Current assignee: Haibo Technology Co Ltd Shenzhen
Priority date: 2007-11-27
Filing date: 2007-11-27
Publication date: 2008-09-17
Anticipated expiration: 2017-11-27

Abstract

The utility model relates to radiological therapy equipment which comprises a shield body, as well as a source body and straightening bodies which are arranged on the shield body, wherein, the source body is loaded with a plurality of radioactive sources, the straightening bodies are provided with a beam channel, the radioactive sources focalize on a public focus through the beam channel, a plurality of straightening bodies are provided, and the corresponding displacement can happen along the straightening bodies; each straightening body is provided with at least one group of through holes inside, the distribution regularity of the through holes is the same as the distribution regularity of the radioactive sources inside the source body, at least one group of through holes is positioned in the high latitude area of the straightening bodies, at least one group of through holes are positioned in the lower latitude area of the straightening bodies; the end parts of the straightening bodies are annular curved surface bodies, the straightening bodies are respectively connected with a power transmission mechanism, so that the corresponding rotation or remotion happens along the straightening bodies. In the curing process, the irradiation beam combination can be automatically performed according to the requirement of the Rx, thereby realizing dynamic grand sight of the doses field, shortening the auxiliary time of radiological therapy, and improving the efficiency of the radiological therapy.

Description

Radiotherapy unit

Technical field

This utility model relates to a kind of radiotherapy equipment, relates in particular to a kind of radiotherapy unit that is used for gamma ray.

Background technology

At present, radiotherapy adopts the operation principle of rotating focus that patient's focus is turned round irradiation, and according to the shape and the position of patient body's inner disease foci, optimizes therapeutic scheme, selects the radiation beam of different-diameter respectively for use, satisfies the requirement of conformal therapy; In radiation therapy process; according to treatment plan; by changing the collimation body of different size; change the diameter of radiation beam; thereby form the different focusing target spots that focus on size, make the lesion tissue of rotating the accumulation place be subjected to the conform irradiation of maximal dose, health tissues is subjected to irradiation instantaneous, tolerance dose; thereby kill focus, protect perilesional health tissues, reach radiocurable purpose.The Chinese patent publication number is that the radiation device of radiation treatment of CN 2676951Y discloses a kind of radiotherapy unit, this device comprises: shield, the source body, pre-collimation body, the helmet, driver part and therapeutic bed, the ray radial convergence of a plurality of radioactive sources is on a public focus of radiation appliance central axis in the body of source, the source body is connected with driver part respectively with pre-collimation body, many group through holes are identical with the distribution of radiation rule on one group of through hole on the pre-collimation body and the helmet, the aperture of every group of through hole is a specification of the same race on the helmet, the helmet docks with pre-collimation body by the mechanism that is located by connecting and is one, make the precollimator in the pre-collimation body aim at wherein one group of whole collimator, the helmet is connected on the therapeutic bed by bearing.Owing to have on the pre-collimation body of this device many group through holes arranged on one group of through hole, the helmet, they are identical with the distribution of radiation rule respectively, the ray of radioactive source focuses on the public focus by one group of through hole, form a kind of dosage field of form, this dosage field is difficult for and irregular focus conformal, to jeopardizing the protection of organ, influence radiocurable accuracy in the difficult realization therapeutic process; The helmet of this device is connected on the therapeutic bed; and dock with pre-collimation body and to be one; be the driven member that collimates body in advance, can not independently rotatablely move, when patient needs the ray focusing irradiation in different apertures; must shut down; manually change the position of helmet butt joint, in therapeutic process, can not realize the dynamically suitable shape of dosage field automatically; prolong radiocurable non-cutting time, reduced the efficient of treatment work.

The utility model content

The purpose of this utility model provides a kind of radiotherapy unit, and its technical problem that will solve is to realize the variation of radiation focusing center space dosage field distribution shape, improves radiocurable accuracy and accuracy, improves radiotherapy efficient.

For achieving the above object this utility model by the following technical solutions:

A kind of radiotherapy unit, comprise: shield, be located on the shield the source body and the collimation body, load a plurality of radioactive sources in the body of source, be provided with radiation channel in the collimation body, radioactive source focuses on the public focus by radiation channel, described collimation body is a plurality of, can relative displacement between the collimation body.

Be provided with at least one group of through hole in the described collimation body, the regularity of distribution of through hole is identical with the regularity of distribution of source body internal source.

Described at least one group of through hole can be positioned at the high latitude zone of collimation body or be positioned at the low latitudes zone of collimation body or be positioned at described middle latitude zone.

Can establish at least two group through holes in the described collimation body, and be arranged in any two zones in high latitude zone, low latitudes zone or these three zones, middle latitude zone of described collimation body.

Can establish at least three group through holes in the described collimation body, wherein have at least one group of through hole be positioned at the collimation body the high latitude zone, have at least one group of through hole to be positioned at the low latitudes zone of collimation body and have at least one group of through hole to be positioned at described middle latitude zone (being the zone between high latitude zone and the low latitudes zone); The end of described collimation body is the annular surface body, and the collimation body is connected with power drive mechanism respectively, makes between the collimation body to relatively rotate or move.

The intravital radioactive source in described source is concentrated and is distributed in the body of source.

Described power drive mechanism is a gear drive, comprising: gear, driving device, the collimation body is connected with the corresponding driving device by gear respectively.

Described power drive mechanism is a shaft transmission, comprising: axle, driving device; The collimation body is connected with the corresponding driving device by axle respectively.

In this utility model, the intravital radioactive source in source is concentrated and is distributed, radiation channel is by the height Latitude Distribution in a plurality of collimation bodies, can select the arcing segmentation to focus on irradiation and the irradiation of high low latitudes combination type in the therapeutic process, form the space dosage field distribution of multiple shape respectively in the focusing center of radioactive source beam, realize the variation of radiation focusing center space dosage field distribution shape, the dosage field that satisfies the beam-focusing center distributes and irregular focus conformal, improves radiocurable accuracy and accuracy; The source body, respectively collimate body and be connected with power drive mechanism respectively, around the independent respectively rotation of same centre of gyration line, intravital radioactive source in source and the interior many group radiation channels of collimation body, in therapeutic process according to the needs of therapeutic scheme, automatically carry out the combination of irradiation beam, realize the dynamically suitable shape of dosage field, shortened radiocurable non-cutting time, improve radiotherapy efficient.

Description of drawings

Fig. 1 is an overall structure cutaway view of the present utility model.

Fig. 2 is an overall structure front view of the present utility model.

Fig. 3 is the front view of middle collimation body.

Fig. 4 is the cutaway view of middle collimation body.

Fig. 5 is the side view of middle collimation body.

Fig. 6 is the axonometric chart of middle collimation body.

Fig. 7 is the front view that collimates body eventually.

Fig. 8 is the cutaway view that collimates body eventually.

Fig. 9 is the side view that collimates body eventually.

Figure 10 is the axonometric chart that collimates body eventually.

Among the figure, the 1st, collimate body eventually, the 2nd, middle collimation body, the 3rd, the source body, the 11st, whole collimator, the 12nd, collimate the body gear eventually, the 13rd, collimate the body drive mechanism eventually, the 21st, intermediate collimator, the 22nd, middle collimation body gear, the 23rd, middle collimation body drive mechanism, the 31st, radioactive source, the 32nd, source body gear, the 33rd, source body drive mechanism, the 40th, centre of gyration line, the 101st, pedestal, the 102nd, shield, the 103rd, shield door.

The specific embodiment

Embodiment is described in further detail this utility model below in conjunction with accompanying drawing.

As Fig. 1, shown in Figure 2, at this utility model is a kind of radiotherapy unit, comprise: pedestal 101, be connected the shield 102 on the pedestal 101, be located at the source body 3 on the shield 102 and collimate body 1 eventually, collimation body 2 in the middle of being provided with between source body 3 and the whole collimation body 1, source body 3, middle collimation body 2 is connected with power drive mechanism respectively with whole collimation body 1, each other can be around same centre of gyration line 40 relatively independent rotations, an end of fan-shaped curved body loads a plurality of radioactive sources 31 in the source body 3, a plurality of radioactive sources 31 in the source body 3 are concentrated and are distributed at least one zone, be respectively equipped with intermediate collimator 21 and whole collimator 11 in middle collimation body 2 and the whole collimation body 1, be provided with through hole in the collimator and form radiation channel, the regularity of distribution of radiation channel is identical with the regularity of distribution of source body 3 internal sources 31, and the radioactive source 31 in the source body 3 focuses on the same centre of gyration line 40 by intermediate collimator 21 and whole collimator 11; The outside of source body 3, middle collimation body 2 and whole collimation body 1 is provided with shield door 103.

Source body 3, one end of middle collimation body 2 and whole collimation body 1 is the annular sphere body, one end of source body 3 also can be block curved body, it is the part of segment or spheroid, source body 3, middle collimation body 2, the other end of collimation body 1 is respectively equipped with source body gear 32 eventually, middle collimation body gear 22, collimate body gear 12 eventually, above-mentioned three

gears

32,22,12 respectively with corresponding source body drive mechanism 33, middle collimation body drive mechanism 23, collimation body drive mechanism 13 is connected eventually, three

drive mechanisms

33,23,13 independent controls realize source body 3, middle collimation body 2 and whole collimation body 1 are around same centre of gyration line 40 relatively independent rotations.Power drive mechanism is a gear drive, comprise: drive motors, travelling gear, drive motors is connected with travelling gear by driving member, travelling gear is connected with corresponding driven member, and the driven member of three drive mechanisms comprises respectively: source body gear 32, middle collimation body gear 22, whole collimation body gear 12.Driving-chain makes the compact conformation of equipment, the volume and weight of minimizing equipment apart from weak point in the gear drive.

As Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, establish in the annular sphere body of middle collimation body 2 that three group screens block, the combination of the combination of one group of intermediate collimator 21, one group of high latitude intermediate collimator 21 and low latitudes shield plug, one group of high latitude shield plug and low latitudes intermediate collimator 21, above-mentioned two combinations are called for short high latitude combination and low latitudes combination respectively, three group screens block and are distributed in the spherical surface body, and 21 groups of intermediate collimator, high latitude combination and low latitudes combination are distributed in respectively between the shield plug group.Intermediate collimator 21 is cylinders that central authorities are provided with through hole, in the through hole established form radiation channel, shield plug is to be processed into solid cylinder by heavy metal material, is provided with six groups of through holes in the middle collimation body 2, collimates in the through hole of body 2 in the middle of intermediate collimator 21 and shield plug grouping are installed in.The gathering center of collimation body 2 in the middle of crossing, and be made as zero latitude perpendicular to the end face of centre of gyration line 40, intermediate collimator 21 near zero latitude area be a low latitudes intermediate collimator 21, is high latitude intermediate collimator 21 away from the intermediate collimator 21 of zero latitude area.

As Fig. 7, Fig. 8, Fig. 9, shown in Figure 10, being provided with whole collimator 11 of four groups of different sizes and four group screens eventually in the annular sphere body of collimation body 1 blocks, four groups of whole collimators 11 and four group screens block and are distributed in the spherical surface body, be provided with through hole in the whole collimator 11 and form radiation channel, radioactive source 31 in the source body 3 is focused on the public focus, and the shield plug in the collimation body 1 is solid cylinder eventually.

Source body 3, middle collimation body 2, whole collimation body 1 independently rotate by drive mechanism separately; During the radiotherapy unit initialization, pass through control system, make in the source body 3 one group of radioactive source 31 successively with centre collimation body 2 in a group screen block and eventually the group screen in the collimation body 1 block and align, two group screens block and have shielded the beam of radioactive source 31, promptly close beam, close shield door 103 simultaneously, improved the shield effectiveness of radioactive source 31, make radiotherapy unit be in the safe condition of non-treatment; In therapeutic process, open shield door 103, one group of radioactive source 31 in the source body 3 selectively with 21 groups of the intermediate collimator of centre collimation body 2, high latitude combination and low latitudes combination alignment, select the position for three of collimation body 2 in the middle of forming, simultaneously, selectively align with the whole collimators 11 of four groups of different sizes that collimate eventually in the body 1, form four selection positions of collimation body 1 eventually, like this, radioactive source 31 is by middle four selection positions that collimate three selection positions of body 2 and collimate body 1 eventually, on the beam-focusing point of radioactive source 31, can form the focusing center of 12 kinds of various dose field distribution, during treatment, the control system of radiotherapy unit is according to the plans of treatment planning systems output, control source body 3, middle collimation body 2, collimate body 1 eventually, make radioactive source 31 by a middle selection position that collimates a selection position of body 2 and collimate body 1 eventually, form first required dosage field in radioactive source 31 focusing center, then, control source body 3 and middle collimation body 2 and collimation body 1 relative rotation eventually, radioactive source 31 is alignd with shield plug, closed beam, by second position of therapeutic bed removing patient to the plans, control source body 3 and middle collimation body 2 and collimation body 1 relative rotation eventually again, make radioactive source 31 select the position to align with middle collimation body 2 and whole second of collimating body 1, form second required dosage field in radioactive source 31 focusing center, the rest may be inferred, adopt the combination of multiple various dose field distribution, realize automatically, treatment continuously.

In this utility model, a plurality of radioactive sources 31 are fan-shaped concentrated distribution in the source body 3, many group radiation channels are provided with shield plug by high low latitudes respectively in the middle collimation body 2, can select the arcing segmentation to focus on irradiation and high latitude combination and low latitudes combination irradiation in the therapeutic process, form the space dosage field distribution of multiple shape respectively in the focusing center of radioactive source 31 beams, realize the variation of radiation focusing center space dosage field distribution shape, the dosage field that satisfies the beam-focusing center distributes and irregular focus conformal, improves radiocurable accuracy and accuracy; Source body 3, middle collimation body 2 and whole collimation body 1 are connected with power drive mechanism respectively, the three is around the independent respectively rotation of same centre of gyration line 40, radioactive source 31 in the source body 3 collimates body 2 and organizes radiation channels in the collimation body 1 more eventually with middle, in therapeutic process according to the needs of therapeutic scheme, automatically carry out the combination of irradiation beam, realize the dynamically suitable shape of dosage field, shortened radiocurable non-cutting time, improve radiotherapy efficient.

In a second embodiment, source body 3, middle collimation body 2 and whole collimation body 1 are the annular sphere body, source body 3, middle collimation body 2 are connected with axle respectively with an end that collimates body 1 eventually, three axle edge shell types are arranged, and be connected with power drive mechanism respectively, power drive mechanism is a shaft transmission, can rotate by driving member gear drive axle, also can pass through driving member synchronous cog belt drive shaft turns, other structure is identical with the structure of describing in first embodiment.

In the 3rd embodiment, comprise in the annular sphere body of middle collimation body 2: one group of intermediate collimator that is provided with through hole 21, one group of high latitude intermediate collimator 21, one group of low latitudes intermediate collimator 21, above-mentioned three groups of collimators along the circumferential direction are distributed in the spherical surface body; 21 groups of high latitude intermediate collimator promptly only are provided with intermediate collimator 21 in the high latitude zone, be the entity structure of middle collimation body 2 in the low latitudes zone; 21 groups of low latitudes intermediate collimator promptly only are provided with intermediate collimator 21 in the low latitudes zone, be the entity structure of middle collimation body 2 in the high latitude zone; Other structure is identical with the structure of describing in first embodiment.

Claims

1, a kind of radiotherapy unit, comprise shield, be located at source body and collimation body on the shield, load a plurality of radioactive sources in the body of described source, be provided with radiation channel in the described collimation body, described radioactive source focuses on the public focus by radiation channel, it is characterized in that described collimation body is a plurality of, can relative displacement between the collimation body.

2, radiotherapy unit according to claim 1 is characterized in that, the intravital radioactive source in described source is concentrated and is distributed in the body of source.

3, radiotherapy unit according to claim 1 is characterized in that, is provided with at least one group of through hole in the described collimation body, and the regularity of distribution of through hole is identical with the regularity of distribution of source body internal source.

4, radiotherapy unit according to claim 3 is characterized in that, described at least one group of through hole is positioned at the high latitude zone of collimation body or is positioned at the low latitudes zone of collimation body or is positioned at described middle latitude zone.

5, radiotherapy unit according to claim 3, it is characterized in that, be provided with at least two group through holes in the described collimation body, and be arranged in any two zones in regional or these three zones, middle latitude zone of high latitude zone, the low latitudes of described collimation body.

6, radiotherapy unit according to claim 3, it is characterized in that, be provided with at least three group through holes in the described collimation body, wherein have at least one group of through hole be positioned at the collimation body the high latitude zone, have at least one group of through hole to be positioned to collimate the low latitudes zone of body and have at least one group of through hole to be positioned at described middle latitude zone.

7, radiotherapy unit according to claim 1 is characterized in that, the end of described collimation body is the annular surface body, and the collimation body is connected with power drive mechanism respectively, makes between the collimation body to relatively rotate or move.

8, radiotherapy unit according to claim 7 is characterized in that, described power drive mechanism is a gear drive, comprises gear and driving device, and described collimation body is connected with the corresponding driving device by gear respectively.

9, radiotherapy unit according to claim 7 is characterized in that, described power drive mechanism is a shaft transmission, comprises axle and driving device; Described collimation body is connected with the corresponding driving device by axle respectively.