CN107485801B - Collimation body and treatment head - Google Patents
Collimation body and treatment head Download PDFInfo
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- CN107485801B CN107485801B CN201710930011.3A CN201710930011A CN107485801B CN 107485801 B CN107485801 B CN 107485801B CN 201710930011 A CN201710930011 A CN 201710930011A CN 107485801 B CN107485801 B CN 107485801B
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- 230000005855 radiation Effects 0.000 claims abstract description 92
- 239000000463 material Substances 0.000 claims abstract description 35
- 230000000903 blocking effect Effects 0.000 claims abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 239000011133 lead Substances 0.000 claims description 10
- 229910001080 W alloy Inorganic materials 0.000 claims description 8
- 238000002560 therapeutic procedure Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- 206010028980 Neoplasm Diseases 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000013585 weight reducing agent Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 18
- 230000002285 radioactive effect Effects 0.000 description 13
- 230000008569 process Effects 0.000 description 7
- 238000001959 radiotherapy Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1042—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy with spatial modulation of the radiation beam within the treatment head
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
- A61N2005/1094—Shielding, protecting against radiation
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract
The invention discloses a collimating body and a treatment head, and belongs to the field of medical instruments. The collimating body includes: the device comprises a base body, a first collimating hole and a second collimating hole, wherein the base body is provided with the first collimating hole; the shielding body is arranged at the outlet of the first collimating hole, and a second collimating hole coaxially communicated with the first collimating hole is arranged on the shielding body; the shield consists of a shielding material for blocking the radiation beam, and the base body consists of a material having a lower density than the shield. So set up this collimation body, make the weight reduction of this collimation body on the one hand, convenient processing, reduction in production cost, and then rotate the in-process at treatment frame, keep the balance and the stability of treatment head more easily, adjust its and the relative position between the radiation source more easily. On the other hand, the dose characteristic of the field of the collimation body is also improved, so that the penumbra and the leakage of the field are reduced, other normal tissues are prevented from being damaged, and the treatment effect on the target tumor is improved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a collimating body and a treatment head.
Background
Multi-source focusing stereotactic radiotherapy is a radiotherapy technique integrating computer technique, stereotactic technique, electric control technique and surgical technique, and it uses the collimation body mounted on the therapeutic head to focus the radiation beams emitted from several radioactive sources and concentrate them on the focus so as to destroy the tumor tissue. Moreover, the size of the radiation field, the size of the focus after the radiation beam is focused and the like can be adjusted through the collimating body, so that the collimating body plays an important role in efficiently treating the tumor tissue. Therefore, the collimating body is an important component of the multi-source focusing stereotactic radiotherapy equipment, and the provision of the collimating body is necessary.
The prior art provides a collimating body, as shown in fig. 1, the collimating body 1a is made of tungsten material, and is provided with a plurality of collimating hole sets, each collimating hole set includes a plurality of collimating holes 1a01 arranged in a linear shape, and each collimating hole 1a01 penetrates through the upper and lower ends of the collimating body 1 a. The inner diameters of the plurality of collimating holes 1a01 in the same group are equal, and the axes of the plurality of collimating holes 1a01 in the same group are focused at a predetermined position below the collimating body 1 a. The inner diameters of the different sets of collimating holes 1a01 are not equal. When the device is used, the collimation body is arranged on the treatment head, the treatment head is arranged on the rotatable treatment rack, and the upper end of the collimation body is tightly attached to the beam outlets of a plurality of radioactive sources (the radioactive sources are arranged into a line shape). During treatment, the position of the collimating body 1a is adjusted to make the plurality of collimating holes 1a01 in a group on the collimating body 1a align with the beam outlets of the plurality of radiation sources, respectively, and the beams emitted by the plurality of radiation sources pass through the plurality of collimating holes 1a01, respectively, and are focused at a preset position below the collimating body 1a to treat the tumor tissue. And during the treatment process, the treatment head rotates along with the treatment rack. When it is desired to adjust the radiation dose, the position of the collimating body 1a is adjusted so that the beam outlets of the plurality of radiation sources are aligned with a set of collimating apertures 1a01 having adapted inner diameters to change the size of the radiation beam passing through the collimating apertures 1a01, thereby adjusting the radiation dose.
The inventor finds that the prior art has at least the following problems:
in the prior art, the collimating body 1a is made of tungsten material, and has the advantages of high density, high weight, difficult processing and high production cost. In addition, in the rotating process of the treatment frame, the collimation body easily influences the balance and stability of the treatment head, and the relative position between the collimation body and the radioactive source is not easy to adjust. However, if the collimator 1a is made of a light material which can be easily processed, the dose characteristics of the field of the collimator are reduced, and the field penumbra and the leakage radiation are increased.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a collimator and a treatment head, which are easy to process, low in production cost, light in weight, and easy to maintain the balance and stability of the treatment head during the rotation of the treatment frame, and easy to adjust the relative position between the treatment head and a radioactive source, and which do not reduce the dose characteristic of the field of the collimator and increase the field penumbra and the field leakage. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a collimating body, including:
the device comprises a base body, a first alignment hole and a second alignment hole, wherein the base body is provided with the first alignment hole;
the shielding body is arranged at the outlet of the first collimating hole, and a second collimating hole coaxially communicated with the first collimating hole is arranged on the shielding body;
the shield is composed of a shielding material for blocking the radiation beam, and the base body is composed of a material having a density less than that of the shield.
Specifically, preferably, the shield is located on the outlet side of the first collimating hole of the substrate and connected with the substrate.
In particular, it is preferred that the shield is disposed within the first collimating aperture.
Specifically, the material of the base is preferably steel, aluminum, or an aluminum alloy.
Specifically, the material of the shield is preferably tungsten, lead, or a tungsten alloy.
Specifically, preferably, the collimating body further comprises: a source of interest body; the source of interest is embedded in the substrate at a position where the first collimating hole is not arranged, and is used for blocking a radiation beam.
Specifically, it is preferable that the thickness of the source body is smaller than or equal to the thickness of the base body.
Specifically, the material of the source body is preferably tungsten, lead, or a tungsten alloy.
Specifically, preferably, a plurality of first collimating hole groups with different aperture sizes are arranged on the substrate, and each first collimating hole group comprises a plurality of first collimating holes with the same aperture.
In a second aspect, an embodiment of the present invention further provides a therapy head, where the therapy head includes: the collimating body.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the collimating body provided by the embodiment of the invention, the shield body is arranged at the outlet of the first collimating hole on the base body, the second collimating hole coaxially communicated with the first collimating hole is arranged on the shield body, the shield body is made of shielding materials for blocking radiation beams, and the base body is made of materials with density smaller than that of the shield body, so that on one hand, the collimating body is lightened in weight, convenient to process and lower in production cost, further, the balance and stability of the treatment head are easier to maintain in the rotating process of the treatment rack, and the relative position between the treatment head and a radioactive source is easier to adjust. On the other hand, the dose characteristic of the field of the collimation body is also improved, so that the field penumbra and the missed radiation are reduced, other normal tissues are prevented from being damaged, and the treatment effect on the target tumor tissue is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a top view of a prior art collimating body;
FIG. 2-1 is a cross-sectional view of a collimating body in a first configuration in accordance with an embodiment of the present invention;
FIG. 2-2 is a cross-sectional view of a collimating body in a second configuration for a shield according to an embodiment of the present invention;
FIG. 3-1 is a top view of a collimating body according to an embodiment of the present invention when the source of interest is in a first configuration;
FIG. 3-2 is a cross-sectional view of a collimating body with equal thickness of the correlation body and the substrate according to an embodiment of the present invention;
3-3 are cross-sectional views of collimating bodies provided by embodiments of the present invention having a thickness of the body less than the thickness of the substrate;
fig. 4 is a top view of a collimating body according to an embodiment of the present invention when the source body has a second structure.
Wherein the reference numerals denote:
1a collimating body, and a collimating body,
1a01 of the collimating holes,
1b a base body, wherein the base body is a hollow body,
1b01 a first collimating aperture,
2, a shielding body is arranged on the upper surface of the shell,
201 a second collimating aperture, 201,
3, a source of the order of origin,
301 child source of interest.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. Before further detailed description of embodiments of the present invention, definitions are given for some terms used to understand examples of the present invention.
In the present invention, "up" is defined as a position close to the radiation source, and "down" is defined as a position far from the radiation source.
"radiation dose" is understood to mean the energy deposited by the radiation beam over the field of view. For example, the greater the intensity of the radiation beam, the greater the radiation dose produced by the radiation beam over the same field of view. The smaller the intensity of the radiation beam, the smaller the radiation dose produced by the radiation beam over the same field of view.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In a first aspect, embodiments of the present invention provide a collimating body, as shown in fig. 2-1 and fig. 2-2, the collimating body comprising: the device comprises a base body 1b, wherein a first collimating hole 1b01 is formed in the base body 1 b; and the shielding body 2 is arranged at the outlet of the first collimating hole 1b01, and the shielding body 2 is provided with a second collimating hole 201 which is coaxially communicated with the first collimating hole 1b 01. The shield 2 consists of a shielding material for blocking the radiation beam, and the base body 1b consists of a material having a lower density than the shield 2.
It should be noted that the material of the shield 2 is more effective than the material of the base 1b in shielding the radiation beam and can sufficiently block the radiation beam, and the density of the material of the base 1b is less than that of the material of the shield 2.
The material of the base 1b may be a metal material such as steel, aluminum, an aluminum alloy, or other composite materials. On the premise of low material cost and easy processing, the material of the substrate 1b is steel, aluminum or aluminum alloy as an optional mode.
The shield 2 has a good shielding capacity for radiation beams and may be made of, for example, tungsten, lead, a tungsten alloy, a composite shielding material containing tungsten or lead, or the like. On the premise of good shielding effect of the radiation beam, the material of the shielding body 2 is tungsten, lead or tungsten alloy as an alternative.
According to the collimating body provided by the embodiment of the invention, the shielding body 2 is arranged at the outlet of the first collimating hole 1b01 on the base body 1b, the second collimating hole 201 coaxially communicated with the first collimating hole 1b01 is arranged on the shielding body 2, the shielding body 2 is made of shielding materials for blocking radiation beams, and the base body 1b is made of materials with density smaller than that of the shielding body 2, so that on one hand, the collimating body is lightened in weight, convenient to process and low in production cost, further, the balance and stability of a treatment head are prevented from being influenced in the rotating process of a treatment rack, and the relative position of the treatment head and a radioactive source is convenient to adjust. On the other hand, the shielding capability of the radiation beam emitted by the second collimating hole 201 is enhanced, the dose characteristic of the collimating body is improved, the field penumbra and the missed radiation are reduced, other normal tissues are prevented from being damaged, and the treatment effect on the target tumor tissue is improved.
The shield 2 may be positioned at the outlet side of the first collimating hole 1b01 of the base 1b and connected to the base 1 b.
The base 1b may be provided with various structures, for example, the base 1b may be a square block structure, an arc-shaped body or a column-shaped structure, or other structures, and the structure of the base 1b is not particularly limited in the embodiment of the present invention, and may be adapted to the therapy head.
The shield 2 may be provided in various structures, for example, the shield 2 may be a block, an arc, a cylinder, or other structures, and the structure of the shield 2 is not particularly limited in the embodiment of the present invention, and may be adapted to the substrate 1 b.
As a first example, as shown in fig. 2-1, when the base body 1b is a square block structure, the shielding body 2 is a square block structure, which is located at the outlet side of the first collimating hole 1b01 of the base body 1b and is connected with the base body 1b, that is: the shield 2 is located below the base 1b, and the upper end surface thereof is connected to the lower end surface of the base 1 b.
Illustratively, when the base 1b is an arc-shaped body structure, the shielding body 2 is an arc-shaped body structure, which is located at the outlet side of the first collimating hole 1b01 of the base 1b and is connected with the base 1b, that is: the shield 2 is located inside the base 1b, and its outer surface is connected to the inner surface of the base 1 b.
Illustratively, when the base 1b has a cylindrical structure, the shield 2 has a cylindrical structure, which is located at the outlet side of the first collimating hole 1b01 of the base 1b and is connected with the base 1b, that is: the shield 2 is located outside the base 1b, and its inner surface is connected to the outer surface of the base 1 b.
When the radiation treatment device is used, a radiation beam sequentially passes through the first collimation hole 1b01 on the base body 1b and the second collimation hole 201 on the shielding body 2, so that the radiation field half-field of the radiation beam passing through the second collimation hole 201 at the focus is reduced, damage to other normal tissues is avoided, the dose distribution characteristic of a radioactive source is optimized, and the treatment effect on tumors is improved.
The connection between the base 1b and the shield 2 may be various, for example, the two may be connected by embedding, clipping or mechanical connection, or may be integrally formed to obtain the collimating body provided by the embodiment of the present invention.
When base member 1b and shield 2 joint, be provided with a plurality of joint grooves on the face of being connected with shield 2 on base member 1b, be provided with a plurality of joint bodies with joint groove looks adaptation on shield 2 with the terminal surface on the face that base member 1b is connected, with joint body and joint groove joint to realize base member 1b and shield 2 joint. The joint body can set up to arc body, square body, or other irregular structure, and the joint groove is the structure with joint body looks adaptation.
In order to avoid leakage of the radiation beam in the gap between the base body 1b and the shield 2, the base body 1b and the shield 2 are optionally integrally formed.
The shield 2 may also be disposed within the first collimating aperture 1b 01.
As a second example, as shown in fig. 2-2, the shield body 2 is a ring-shaped body, and is disposed in the first collimating hole 1b 01.
That is, the shielding body 2 is a plurality of independent annular bodies, which are respectively arranged at the inner outlet of each first collimating hole 1b01, and the through hole (i.e., the second collimating hole 201) on each annular shielding body 2 is coaxially communicated with the corresponding first collimating hole 1b 01. By arranging the shielding body 2 in this way, the material used by the shielding body 2 can be saved, and the weight of the collimating body provided by the embodiment of the invention is reduced.
When the radiation treatment device is used, radiation beams sequentially pass through the first collimation hole 1b01 on the base body 1b and the second collimation hole 201 arranged on the shielding body 2 at the inner outlet of the first collimation hole 1b01, so that the radiation field half field of the radiation beams penetrating out of the second collimation hole 201 at the focus is reduced, damage to other normal tissues is avoided, the dose distribution characteristic of a radioactive source is optimized, and the treatment effect on tumors is improved.
In this example, the outlet of the second collimating hole 201 may be flush with the outlet of the first collimating hole 1b01 (see fig. 2-2), i.e. the lower end of the shield 2 is flush with the lower end of the base 1 b.
In this example, the outer contour of the shield 2 may be provided in various structures, and it is sufficient that the second collimating hole 201 on the shield 2 is coaxially communicated with the first collimating hole 1b 01. For example, the outer contour of the shield 2 may be a square, a cylinder, a hexagonal cylinder, etc., and it is sufficient that the side wall of the shield 2 is connected with the inner wall of the first alignment hole 1b01 seamlessly, or in an interference fit. In this example, the shield body 2 is a ring-shaped body, and the outer contour of the shield body 2 is not particularly limited.
The shield 2 may be disposed in the first collimating hole 1b01 in various ways, for example, the shield 2 is integrally formed with the base 1b, or the shield 2 is embedded in the wall of the first collimating hole 1b01, or is clamped with the inner wall of the first collimating hole 1b 01.
In the case of using the collimating body provided by the embodiment of the present invention, for example, when the collimating body is mounted on a treatment head to treat tumor tissue, a plurality of radiation beams emitted by a plurality of radiation sources on the treatment head respectively pass through a plurality of first collimating holes 1b01 on the base body 1b and a plurality of second collimating holes 201 on the shielding body 2, and then are focused on the target tumor tissue to treat the tumor tissue. The radiation beam is shielded while the treatment is stopped.
When stopping the treatment, the portion of the substrate 1b not provided with the first collimating holes 1b01 can be used to align with a plurality of radiation sources to shield a plurality of radiation beams.
In order to enhance the shielding effect of the radiation beam on the portion of the substrate 1b where the first collimating hole 1b01 is not disposed, as shown in fig. 3-1, the collimating body provided by the embodiment of the present invention further includes: a source-of-failure body 3; the shutter 3 is embedded in the substrate 1b at a location where the first collimating aperture 1b01 is not located, for blocking the radiation beam.
The base 1b includes a portion where the first collimating hole 1b01 is provided and a portion where the first collimating hole 1b01 is not provided. Taking the upper end surface of the substrate 1b (i.e. the end close to the radioactive source) as an example, the source-closing body 3 can be embedded into the substrate 1b from the position where the first collimating hole 1b01 is not formed on the upper end surface of the substrate 1b, and it is required to ensure that the source-closing body 3 does not affect the use of the first collimating hole 1b 01.
When the treatment is stopped, the position of the substrate 1b is adjusted so that the plurality of radiation sources are aligned with the focus volume 3 to shield the radiation beam.
The source 3 can be set in various structures, and on the premise of easy setting and convenient ray shielding, the following two examples are given:
as a first example, as shown in FIG. 3-1, the source body 3 is a block-shaped body, and is embedded in the base body 1b from the middle of the upper end surface of the base body 1 b. At this time, the first collimating holes 1b01 are located at both side portions of the base 1 b.
When the treatment is stopped, the base body 1b is moved so that the shutter 3 is aligned with the beam outlets of the plurality of radiation sources, thereby shielding the radiation.
The above-mentioned source-closing body 3 is an integral body, easy to set, and when the position of the collimating body is regulated, it can make the source-closing body 3 quickly be aligned with the beam outlets of several radioactive sources so as to block radiation beam.
In this example, the source of interest 3 may be provided in various block shapes, such as a square block, a trapezoid block, a cylinder, etc., as long as it can block the radiation beams emitted from the plurality of radiation sources at the same time, and the structure of the source of interest 3 is not particularly limited.
As a second example, as shown in fig. 4, one or more first collimating hole sets may be disposed on the substrate 1b, each first collimating hole set includes a plurality of first collimating holes 1b01, and the source 3 includes: at least one sub-source body group; moreover, the number and arrangement of the sub-correlation bodies 301 in any sub-correlation body group are the same as those of the first collimation holes 1b01 in any first collimation hole group.
That is, the number of the sub-gateway groups is at least one, each sub-gateway group includes a plurality of sub-gateways 301, and the number and the arrangement of the plurality of sub-gateways 301 in each sub-gateway group are the same. The number and arrangement of the plurality of sub-correlation bodies 301 in each sub-correlation body group are the same as those of the plurality of first collimation holes 1b01 in any first collimation hole group.
When the treatment is stopped, the substrate 1b is adjusted so that the beam outlets of the plurality of radiation sources are aligned with the plurality of sub-sources 301, respectively, thereby shielding the radiation beams.
The arrangement of the plurality of first collimating holes 1b01 in the first collimating hole group is the same as the arrangement of the plurality of radioactive sources, so that the radiation beams pass through the plurality of first collimating holes 1b01, and the arrangement of the plurality of sub-sources 301 in the sub-source-related group is set to be the same as the arrangement of the plurality of first collimating holes 1b01 in any one first collimating hole group, so that the plurality of sub-sources 301 in the sub-source-related group are aligned with the beam outlets of the plurality of radioactive sources, thereby shielding the radiation.
The source closing body 3 is arranged in this way, so that the use amount of the material of the source closing body 3 can be reduced, and the cost of raw materials is reduced.
Specifically, the number of groups of the sub-correlation volume groups may be greater or less than or equal to the number of groups of the first collimation hole group.
When the number of the sub-source-related body groups is equal to or less than the number of the first collimating hole groups, at least one sub-source-related body group may be disposed between two adjacent first collimating hole groups along the arrangement direction of the first collimating hole groups. It is also possible to arrange each sub-correlation group in at least one sub-correlation group in any one first collimation hole group, and to arrange the plurality of sub-correlation bodies 301 in each sub-correlation group in alternation with the plurality of first collimation holes 1b01 in the corresponding first collimation hole group.
For convenience of setting, processing steps are reduced, and production cost is reduced, as an optional mode, as shown in fig. 4, the gateway 3 includes a group of sub-gateway groups; the plurality of sub-sources 301 are alternately arranged with the plurality of first collimating holes 1b01 in any one group.
The sub-source 301 may be configured in various configurations, such as a square block, a circular block, a triangular block, or other regular and irregular blocks, which are not limited herein, and can shield or block the beam outlet of the radiation source.
In both examples, the thickness of the body of interest 3 may be smaller than the thickness of the base body 1b, see fig. 3-3, or equal to the thickness of the base body 1b, see fig. 3-2.
The greater the thickness of the shutter body 3, the better its effect of shielding the radiation beam.
The shutter body 3 is made of a material sufficient to block the radiation beam, and it shields the radiation beam better than the base body 1 b. The shutter 3 may be made of a variety of shielding materials, for example, tungsten, lead, tungsten alloys, composite shielding materials containing tungsten or lead, and the like. On the premise of good radiation beam shielding effect, the material of the source closing body 3 is tungsten, lead or tungsten alloy.
In the embodiment of the present invention, one or more first collimating hole sets may be disposed on the substrate 1 b. When treating different tumour tissues, in order to facilitate adjusting the radiation dose, in order to kill tumour cells efficiently, protect other normal tissues, be provided with the first collimation hole group of a plurality of aperture size differences on the base member 1b, every first collimation hole group includes the same first collimation hole 1b01 of a plurality of apertures.
In adjusting the radiation dose, the quantitative inner diameter of the first collimation holes 1b01 adapted to the radiation dose is determined, and a set of first collimation holes having the quantitative inner diameter is aligned with the beam outlets of the plurality of radiation sources, so as to treat the tumor tissue with a suitable radiation dose.
Specifically, each of the groups of first collimating holes includes a plurality of first collimating holes 1b01, and the axes of the plurality of first collimating holes 1b01 in each group are focused at a predetermined position below the base 1b, so that a plurality of radiation beams respectively passing through the plurality of first collimating holes 1b01 in the same group are focused at a predetermined position below the base 1b along the axial direction.
Different groups of first collimating holes 1b01 have different inner diameters, and different groups of first collimating holes 1b01 are selected to pass through and focus the radiation beam, so that radiation focuses with different radiation doses and radiation fields can be obtained, and different tumor tissues can be treated.
The plurality of first collimating apertures 1b01 in different groups are arranged in the same manner to match the plurality of radiation sources, and each group of first collimating apertures 1b01 is arranged in the same manner as the plurality of radiation sources.
In a second aspect, an embodiment of the present invention further provides a therapy head, where the therapy head includes: the collimating body is described above.
Because the collimation body installed on the treatment head has light weight and excellent radiation field dosage characteristic, the radiation field penumbra and the radiation leakage are small, the relative position of the collimation body and the treatment head is convenient to adjust, and the treatment head can keep balance and stability when moving or rotating.
The treatment head can be applied to various devices, and as an alternative mode, the treatment head is applied to multi-source focusing stereotactic radiotherapy. Wherein, the treatment head is arranged on the treatment frame. The treatment of tumor tissue with this treatment head is described in detail below:
when tumor tissue is treated, the relative positions of the collimating body and the plurality of radiation sources in the treatment head are adjusted, so that the plurality of first collimating holes 1b01 in a collimating hole group on the collimating body are aligned with the beam outlets of the plurality of radiation sources, and a plurality of beams pass through the plurality of first collimating holes 1b01 and then are focused at a preset position below the collimating body, so that the target tumor tissue is treated.
When adjusting the radiation dose, a first set of collimation holes adapted to the radiation dose is determined and a first plurality of collimation holes 1b01 in the first set of collimation holes is aligned with the beam outlets of the plurality of radiation sources.
When the treatment is stopped, the shutter 3 on the collimator is aligned with the beam outlets of the plurality of radiation sources to shield the radiation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A collimating body, comprising:
the device comprises a base body (1b), wherein a first collimating hole (1b01) is formed in the base body (1 b);
the shielding body (2) is fixedly arranged at the outlet of the first collimating hole (1b01) in a mechanical connection mode, and a second collimating hole (201) coaxially communicated with the first collimating hole (1b01) is arranged on the shielding body (2);
the shield (2) is made of a shielding material for blocking a radiation beam, and the base body (1b) is made of a material having a lower density than the shield (2);
the collimating body further comprises: a source of interest body (3); the source of interest (3) is embedded in the base body (1b) at a position where the first collimating aperture (1b01) is not provided, for blocking a radiation beam;
the source of interest body (3) is made of tungsten, lead or tungsten alloy;
the base body (1b) is configured to enable alignment of a plurality of radiation sources with the source-of-interest body (3) by adjusting the position of the base body (1b) to shield the radiation beam, enabling source-of-interest.
2. The collimating body according to claim 1, wherein the shield (2) is connected to the base body (1b) on the side of the base body (1b) from which the first collimating hole (1b01) exits.
3. The collimating body according to claim 1, wherein the shield (2) is arranged within the first collimating aperture (1b 01).
4. The collimating body according to claim 1, wherein the material of the base body (1b) is steel, aluminum, or an aluminum alloy.
5. The collimating body according to claim 1, wherein the material of the shield (2) is tungsten, lead, or a tungsten alloy.
6. The collimating body according to claim 1, wherein the thickness of the source body (3) is smaller than the thickness of the base body (1b) or equal to the thickness of the base body (1 b).
7. The collimating body according to claim 1, wherein the base body (1b) is provided with a plurality of first collimating hole sets with different aperture sizes, and each first collimating hole set comprises a plurality of first collimating holes (1b01) with the same aperture size.
8. A therapy head, characterized in that it comprises: the collimating body of any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710930011.3A CN107485801B (en) | 2017-10-09 | 2017-10-09 | Collimation body and treatment head |
| PCT/CN2018/105666 WO2019072069A1 (en) | 2017-10-09 | 2018-09-14 | Collimator and treatment head |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710930011.3A CN107485801B (en) | 2017-10-09 | 2017-10-09 | Collimation body and treatment head |
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| CN107485801A CN107485801A (en) | 2017-12-19 |
| CN107485801A8 CN107485801A8 (en) | 2018-03-23 |
| CN107485801B true CN107485801B (en) | 2021-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107485801B (en) * | 2017-10-09 | 2021-04-23 | 深圳市奥沃医学新技术发展有限公司 | Collimation body and treatment head |
| CN108042927A (en) * | 2018-01-17 | 2018-05-18 | 深圳市百光疗医疗器械有限公司 | A kind of Novel medical ultraviolet phototherapy instrument |
| WO2019174461A1 (en) * | 2018-03-16 | 2019-09-19 | 西安大医集团有限公司 | Focusing head, collimator and gamma knife |
| CN108379748B (en) | 2018-04-09 | 2019-11-05 | 西安大医集团有限公司 | Radiotherapy head and radiotherapy unit |
| CN109157762B (en) * | 2018-08-24 | 2023-12-08 | 西安大医集团股份有限公司 | Collimation body, radiotherapy equipment and driving control method thereof |
| CN108969913B (en) * | 2018-09-05 | 2024-03-08 | 国科中子医疗科技有限公司 | Neutron beam collimator |
| CN109464753B (en) * | 2018-10-12 | 2020-10-27 | 高飞 | Radiation beam guiding mechanism of radiotherapy apparatus |
| CN110812711A (en) * | 2019-10-22 | 2020-02-21 | 燕山大学 | Radiotherapy equipment based on parallel mechanism |
| CN112816398B (en) * | 2020-12-30 | 2023-07-25 | 中国科学院近代物理研究所 | Plant microbeam irradiation experiment collimator and automatic sample changing device |
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| CN1569275A (en) * | 2004-04-29 | 2005-01-26 | 杭州华源伽玛医疗设备投资有限公司 | Gamma ray radiation device |
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| CN104601868B (en) * | 2015-01-15 | 2019-02-15 | 长源动力（北京）科技有限公司 | A kind of radiation-resistant photographing device |
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| US20030076926A1 (en) * | 2000-12-15 | 2003-04-24 | Renner Wendel Dean | Radiation therapy dosimetry quality control process |
| CN201725599U (en) * | 2010-08-04 | 2011-01-26 | 北华大学 | Medical treatment X-ray coherent scattering combined type multi-level collimator |
| CN106456991A (en) * | 2015-08-04 | 2017-02-22 | 西安大医数码技术有限公司 | Focussed radiotherapy apparatus and radiation therapy device |
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| WO2019072069A1 (en) | 2019-04-18 |
| CN107485801A (en) | 2017-12-19 |
| CN107485801A8 (en) | 2018-03-23 |
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