CN219574385U - Double-layer multi-wire ionization chamber - Google Patents
Double-layer multi-wire ionization chamber Download PDFInfo
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- CN219574385U CN219574385U CN202320484245.0U CN202320484245U CN219574385U CN 219574385 U CN219574385 U CN 219574385U CN 202320484245 U CN202320484245 U CN 202320484245U CN 219574385 U CN219574385 U CN 219574385U
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- 239000010410 layer Substances 0.000 claims description 17
- 210000001503 joint Anatomy 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 3
- 239000002355 dual-layer Substances 0.000 claims 2
- 230000005855 radiation Effects 0.000 abstract description 14
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 238000003384 imaging method Methods 0.000 description 16
- 238000001959 radiotherapy Methods 0.000 description 8
- 206010028980 Neoplasm Diseases 0.000 description 4
- 238000007408 cone-beam computed tomography Methods 0.000 description 4
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002665 ion therapy Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a double-layer multi-wire ionization chamber, which belongs to the field of radiation monitoring and comprises a first ionization chamber and a second ionization chamber; the first ionization chamber and the second ionization chamber are vertically distributed; the area of the union of the projected pattern of the first ionization chamber on the upper surface of the second ionization chamber and the pattern of the upper surface of the second ionization chamber is larger than the area of the upper surface of the second ionization chamber; the area of intersection of the projected pattern of the first ionization chamber on the second ionization chamber upper surface and the pattern of the second ionization chamber upper surface is less than the sum of the areas of the second ionization chamber upper surface and the projection of the first ionization chamber on the second ionization chamber upper surface; a first amplifier and a second amplifier are respectively arranged on the end parts of the first ionization chamber and the second ionization chamber; the double-layer multi-wire ionization chamber also comprises a control center end, so that the beam intensity distribution in multiple directions and the radiation field with any shape can be monitored.
Description
Technical Field
The utility model relates to the field of radiation monitoring, in particular to a double-layer multi-wire ionization chamber.
Background
The imaging system in each radiotherapy system refers to a system for imaging before and during treatment, and is mainly used for positioning before treatment, detecting positions during treatment, guiding and tracking target areas, such as kilovolt-level X rays, megavolt-level X rays, nuclear magnetic imaging, PET (polyethylene terephthalate) and the like. Multi-modality imaging refers to imaging using multiple modalities such as cross imaging, CBCT, etc., to provide 2-dimensional (2D), 3-dimensional (3D), 4-dimensional (4D) image guidance, real-time tracking, on-line adaptive radiotherapy, etc. for radiation therapy. The patient is imaged before or during treatment by the imaging system of the radiotherapy equipment, and the patient is placed at the correct position. Such devices include single plane imaging (DRR), cross imaging systems (2 sets of imaging devices placed at an angle, 2 sets of DRR) and cone beam volume imaging (CBCT), where a single imaging device can image at an angle to form a single plane 2D image, and can also be rotated around the patient to produce a 3D CBCT image. The cross imaging system is provided with two sets of imaging devices, can perform single-plane imaging, double-plane cross stereoscopic imaging and can rotate CBCT images.
Radiation source means a device that generates radiation, such as: x-rays, electron beams, proton beams and heavy ion beams generated by the accelerator, and gamma rays and neutron beams generated by the radioactive source. Accelerator radiotherapy systems use medical accelerators to generate X-rays, electron beams, including conventional accelerators, wave cutters, X-cutters, and the like. Gamma knife and cobalt-60 radiotherapy machine are devices which utilize cobalt-60 decay to produce gamma rays as radiation sources. Proton and heavy ion therapy devices are devices that generate protons and heavy ions using means such as cyclotrons, synchrotrons, and the like.
General goal of radiation therapy: (1) Irradiating a highly conformal dose distribution to a tumor region or target region, the tumor obtaining a sufficient dose; (2) Normal tissues are well protected by very low doses; (3) accurately guiding and positioning the image and accurately tracking the tumor; (4) The dynamic tumor can be precisely irradiated, and has good respiratory movement management capability.
The existing multi-wire ionization chamber which is single-layer is one-dimensional and single in function, and the beam intensity in one direction is monitored.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model aims to provide a double-layer multi-wire ionization chamber which can monitor beam intensity distribution in multiple directions and a radiation field with any shape.
In order to solve the problems, the utility model adopts the following technical scheme.
A double-layer multi-wire ionization chamber, comprising a first ionization chamber and a second ionization chamber; the first ionization chamber and the second ionization chamber are vertically distributed; the projection of the first ionization chamber on the upper surface of the second ionization chamber intersects the second ionization chamber; the area of the union of the projected pattern of the first ionization chamber on the upper surface of the second ionization chamber and the pattern of the upper surface of the second ionization chamber is larger than the area of the upper surface of the second ionization chamber; the area of intersection of the projected pattern of the first ionization chamber on the second ionization chamber upper surface and the pattern of the second ionization chamber upper surface is less than the sum of the areas of the second ionization chamber upper surface and the projection of the first ionization chamber on the second ionization chamber upper surface; a first amplifier and a second amplifier are respectively arranged on the end parts of the first ionization chamber and the second ionization chamber; the double-layer multi-wire ionization chamber also comprises a control center end; the first amplifier and the second amplifier are in information interaction with the control center through wires or wirelessly.
The beam intensity distribution in multiple directions can be monitored through the cross distribution of the two ionization chambers; monitoring beam intensity distribution in multiple directions and a radiation field with any shape by using a cross-distributed multi-wire ionization chamber; the multi-filament ionization chambers which are distributed in a crossed way are not influenced by the positions of the blades of the multi-blade collimator, and each measuring unit needs to be small; the measurement of the upper and lower layers of multi-wire ionization chambers is not interfered with each other, and measurement data in multiple directions are accurately obtained.
Preferably, a plurality of conductive wires are arranged in each of the first ionization chamber and the second ionization chamber.
Because the multi-wire ionization chamber is an ionization chamber with conductive wires in the middle, the ionization chamber can be manufactured into different diameters, lengths and numbers according to requirements. Multiple multi-filament ionization chambers are arranged side by side to form a matrix for large-scale monitoring. Each multi-filament ionization chamber can be provided with blades of a multi-blade collimator in a one-to-one correspondence, and the position of each blade is monitored. Since the multi-filament ionization chamber has directionality, a double-layer cross arrangement can avoid the problem, and the intensity distribution of the radiation beam and the collimator position in two directions can be monitored.
Preferably, two ends of the first ionization chamber are provided with a first connection ionization chamber; the first connection ionization chamber is connected with the first ionization chamber in an opposite way to form a large-area ionization chamber; two ends of the second ionization chamber are provided with a second connection ionization chamber; the second connection ionization chamber is in butt joint with the second ionization chamber to form a large-area ionization chamber.
The first connection ionization chamber is connected with the first ionization chamber in a butt joint mode to form a large-area ionization chamber, and the second connection ionization chamber is connected with the second ionization chamber in a butt joint mode to form a large-area ionization chamber, so that the area of the ionization chamber can be increased, and the monitored area is increased.
Preferably, a first driving piece and a second driving piece are arranged below the first ionization chamber and the second ionization chamber; the first driving piece is used for driving the two connecting ionization chambers to be close to or far away from each other so that the two connecting chambers are close to each other and are in butt joint to form a complete ionization chamber; the second driving piece is used for driving the complete ionization chamber to rotate.
The first driving piece is used for driving the two connected ionization chambers to be close to each other or far away from each other, so that the two connected chambers are close to each other and are in butt joint to form a complete ionization chamber, the original large-area ionization chamber can be split into two ionization chambers which are distributed up and down, the multi-layer ionization chamber can be monitored in multiple dimensions, multiple directions can be monitored, and the monitoring effect is improved.
Preferably, the first driving member includes: a first rotating arm and a second rotating arm; the first rotating arm and the second rotating arm are hinged with the connecting ionization chamber; the lower parts of the first rotating arm and the second rotating arm are respectively provided with a transmission part and a first driving motor, and the first driving motor drives the first rotating arm and the second rotating arm to rotate through the transmission parts.
Preferably, the second driving member includes: a first bracket and a second bracket; the first bracket is provided with a second driving motor which is used for driving the second bracket to rotate; the first rotating arm and the second rotating arm are both hinged with the second bracket.
Compared with the prior art, the utility model has the advantages that:
1. the device for monitoring the radiation beam intensity distribution of radiotherapy and the radiation field of the collimator by adopting the cross-distributed multi-wire ionization chamber can monitor the beam intensity distribution in multiple directions and the radiation field of the beam passing through the collimator.
2. The first connection ionization chamber and the second connection ionization chamber are in butt joint with the original ionization chamber, so that the monitoring area of the original ionization chamber is increased.
3. The first connection ionization chamber and the second connection ionization chamber move downwards to the lower part of the original ionization chamber and are in butt joint with each other, so that the number of layers is increased, and the monitoring direction is increased.
Drawings
FIG. 1 is a schematic overall structure of the present utility model;
fig. 2 is a schematic structural view of the first driving member and the second driving member and part of surrounding parts according to the present utility model.
The reference numerals in the figures illustrate:
1. a first ionization chamber; 2. a second ionization chamber; 3. a first amplifier; 4. a second amplifier; 5. a first connection ionization chamber; 6. the second is connected with the ionization chamber; 7. a first driving member; 71. a first rotating arm; 72. a second rotating arm; 73. a transmission member; 731. a rack; 732. a gear; 74. a first driving motor; 8. a second driving member; 81. a first bracket; 82. a second bracket; 83. a second driving motor; 84. and a lifting motor.
Detailed Description
A double-layer multi-wire ionization chamber comprises a first ionization chamber 1 and a second ionization chamber 2; the first ionization chamber 1 and the second ionization chamber 2 are vertically distributed; the projection of the first ionization chamber 1 on the upper surface of the second ionization chamber 2 intersects the second ionization chamber 2; and the area of the union of the projected pattern of the first ionization chamber 1 on the upper surface of the second ionization chamber 2 and the pattern of the upper surface of the second ionization chamber 2 is larger than the area of the upper surface of the second ionization chamber 2; the area of intersection of the projected pattern of the first ionization chamber 1 on the upper surface of the second ionization chamber 2 and the pattern of the upper surface of the second ionization chamber 2 is smaller than the sum of the areas of the upper surface of the second ionization chamber 2 and the projected pattern of the first ionization chamber 1 on the upper surface of the second ionization chamber 2. A first amplifier 3 and a second amplifier 4 are respectively arranged on the end parts of the first ionization chamber 1 and the second ionization chamber 2; the double-layer multi-wire ionization chamber also comprises a control center end; the first amplifier 3 and the second amplifier 4 are in information interaction with the control center through wires or wirelessly. And a plurality of conductive wires are arranged in each of the first ionization chamber 1 and the second ionization chamber 2.
Specifically, a first connection ionization chamber 5 is installed at two ends of the first ionization chamber 1; the first connection ionization chamber 5 is in butt joint with the first ionization chamber 1 to form a large-area ionization chamber; two ends of the second ionization chamber 2 are provided with a second connection ionization chamber 6; the second connection ionization chamber 6 is in butt joint with the second ionization chamber 2 to form a large-area ionization chamber.
More specifically, a first driving piece 7 and a second driving piece 8 are arranged below the first ionization chamber 1 and the second ionization chamber 2; the first driving piece 7 is used for driving the two connecting ionization chambers to be close to each other or far away from each other so that the two connecting chambers are close to each other and are in butt joint to form a complete ionization chamber; the second driver 8 is used to drive the complete ionization chamber in rotation. The first driving member 7 includes: a first rotating arm 71, a second rotating arm 72, a transmission member 73, and a first driving motor 74; the first rotating arm 71 and the second rotating arm 72 are hinged with a connecting ionization chamber; the transmission member 73 and the first driving motor 74 are located below the first rotating arm 71 and the second rotating arm 72, and the first driving motor 74 drives the first rotating arm 71 and the second rotating arm 72 to rotate through the transmission member 73. The transmission member 73 includes; the two racks 731 and the plurality of gears 732, the gears 732 are fixed with the first rotating arm 71 and the second rotating arm 72, the first driving motor 74 is of a linear driving electric cylinder structure, the first driving motor 74 is used for driving the two racks 731 to be close to or far from each other, the racks 731 are meshed with the gears 732, the racks 731 drive the gears 732 to rotate, the gears 732 drive the first rotating arm 71 and the second rotating arm 72 to rotate, and then the first rotating arm 71 and the second rotating arm 72 drive the two connecting ionization chambers to move and butt joint together. The second driving member 8 includes: a first bracket 81 and a second bracket 82; the first bracket 81 is provided with a second driving motor 83, and the second driving motor 83 is used for driving the second bracket 82 to rotate; the first and second swivel arms 71 and 72 are each hinged to a second bracket 82. The first drive motor 74 is mounted on the second bracket 82. The lifting motor 84 is installed below the first support 81, and the lifting motor 84 is used for driving the first support 81 and the second support 82 to move upwards or downwards, so that the first connection ionization chamber 5 and the second connection ionization chamber 6 can move upwards or downwards, and the first connection ionization chamber 5 and the second connection ionization chamber 6 are butted together and move to a proper position.
Working principle:
after passing through the collimator, the radiation beam generated by the radiation source reaches the double-layer multi-filament ionization chamber. The first ionization chamber 1 performs one direction monitoring and the second ionization chamber 2 monitors the other direction, both directions monitoring the beam intensity distribution. The beam intensity distribution can be compared with the beam intensity designed by the treatment plan, so that the purpose of real-time monitoring is achieved.
The lifting motor 84 drives the first support 81 to move downwards, the first support 81 drives the second driving motor 83 to move downwards, so that the second support 82 moves downwards, the first rotating arm 71 and the second rotating arm 72 on the second support 82 also move downwards, so that the first connection ionization chamber 5 and the second connection ionization chamber 6 move downwards below the first ionization chamber 1, then the first driving motor 74 drives the two racks 731 to move away from each other, then the gear 732 rotates, the gear 732 drives the first rotating arm 71 and the second rotating arm 72 to rotate, then the first connection ionization chamber 5 and the second connection ionization chamber 6 are close to each other until being butted together, then the lifting motor 84 adjusts the height positions of the first connection ionization chamber 5 and the second connection ionization chamber 6, the second driving motor 83 drives the second support 82 to rotate, so that the first connection ionization chamber 5 and the second connection ionization chamber 6 which are not butted together rotate to form an included angle with the first ionization chamber 1, and thus the first ionization chamber 1, the second connection ionization chamber 2 and the first connection ionization chamber 5 and the third connection ionization chamber 6 which are butted together can be formed. In other ways, the second ionization chamber 2 may also be provided with the same structure as the surrounding parts of the first ionization chamber 1, so that four layers of monitoring may be obtained.
Claims (6)
1. A double-deck multifilament ionization chamber, characterized in that: comprises a first ionization chamber (1) and a second ionization chamber (2); the first ionization chamber (1) and the second ionization chamber (2) are vertically distributed; the projection of the first ionization chamber (1) on the upper surface of the second ionization chamber (2) is intersected with the second ionization chamber (2); the area of the union of the projected pattern of the first ionization chamber (1) on the upper surface of the second ionization chamber (2) and the pattern of the upper surface of the second ionization chamber (2) is larger than the area of the upper surface of the second ionization chamber (2); the area of intersection of the projected pattern of the first ionization chamber (1) on the upper surface of the second ionization chamber (2) and the pattern of the upper surface of the second ionization chamber (2) is smaller than the sum of the areas of the upper surface of the second ionization chamber (2) and the projected pattern of the first ionization chamber (1) on the upper surface of the second ionization chamber (2); a first amplifier (3) and a second amplifier (4) are respectively arranged on the end parts of the first ionization chamber (1) and the second ionization chamber (2); the double-layer multi-wire ionization chamber also comprises a control center end; the first amplifier (3) and the second amplifier (4) are in information interaction with the control center through wires or wirelessly.
2. A dual layer multifilament ionization chamber according to claim 1, wherein: and a plurality of conductive wires are arranged in each of the first ionization chamber (1) and the second ionization chamber (2).
3. A dual layer multifilament ionization chamber according to claim 1, wherein: two ends of the first ionization chamber (1) are provided with a first connection ionization chamber (5); the first connection ionization chamber (5) is in butt joint with the first ionization chamber (1) to form a large-area ionization chamber; two ends of the second ionization chamber (2) are provided with a second connection ionization chamber (6); the second connection ionization chamber (6) is in butt joint with the second ionization chamber (2) to form a large-area ionization chamber.
4. A double-layer multifilament ionization chamber according to claim 3, wherein: a first driving piece (7) and a second driving piece (8) are arranged below the first ionization chamber (1) and the second ionization chamber (2); the first driving piece (7) is used for driving the two connecting ionization chambers to be close to each other or to be far away from each other so that the two connecting chambers are close to each other and are in butt joint to form a complete ionization chamber; the second driving member (8) is used for driving the complete ionization chamber to rotate.
5. The double-layer multifilament ionization chamber of claim 4, wherein: the first driving member (7) comprises: a first rotating arm (71) and a second rotating arm (72); the first rotating arm (71) and the second rotating arm (72) are hinged with the connecting ionization chamber; the lower parts of the first rotating arm (71) and the second rotating arm (72) are respectively provided with a transmission part (73) and a first driving motor (74), and the first driving motor (74) drives the first rotating arm (71) and the second rotating arm (72) to rotate through the transmission parts (73).
6. The double-layer multifilament ionization chamber of claim 5, wherein: the second driving member (8) comprises: a first bracket (81) and a second bracket (82); a second driving motor (83) is arranged on the first bracket (81), and the second driving motor (83) is used for driving the second bracket (82) to rotate; the first rotating arm (71) and the second rotating arm (72) are hinged with the second bracket (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320484245.0U CN219574385U (en) | 2023-03-14 | 2023-03-14 | Double-layer multi-wire ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320484245.0U CN219574385U (en) | 2023-03-14 | 2023-03-14 | Double-layer multi-wire ionization chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219574385U true CN219574385U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320484245.0U Active CN219574385U (en) | 2023-03-14 | 2023-03-14 | Double-layer multi-wire ionization chamber |
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| Country | Link |
|---|---|
| CN (1) | CN219574385U (en) |
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- 2023-03-14 CN CN202320484245.0U patent/CN219574385U/en active Active
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