Multi-dimensional radiotherapy dose measurement equipment

Abstract

The utility model relates to the field of quality control of medical electron linear accelerators. Multi-dimensional radiotherapy dose measuring equipment comprises a multifunctional water tank, mounting grooves arranged in a matrix mode are formed in a bottom plate of the multifunctional water tank, the mounting grooves are used for placing thermoluminescence dosimeters, and film slots used for inserting films are formed in the bottom of the inner wall of the multifunctional water tank; three mounting holes with different heights are formed in a side plate of the multifunctional water tank, the mounting holes are used for being in butt joint with an ionization chamber plug or a water tank plug, and the water tank plug is used for blocking the mounting holes; the ionization chamber plug is used for installing the ionization chamber, and a through hole for inserting the ionization chamber is formed in the ionization chamber plug; the thermoluminescence dosimeter box further comprises a bearing bottom plate, bearing grooves distributed in a matrix mode are formed in the bearing bottom plate, and the bearing grooves are used for containing thermoluminescence dosimeters. By optimizing the structure of the water tank, compared with a traditional one-dimensional water tank, the dose measurement dimensionality is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical electron linear accelerator quality control field, concretely relates to radio dose measurement equipment. BACKGROUND

[0002] The dose measurement device commonly used in the clinic at present includes a one-dimensional water tank, and the point dose measurement is realized by combining the one-dimensional water tank with a single ionization chamber, and the dose measurement device only provides dose information at a specific point and cannot reflect the dose distribution of the whole treatment area. The radiotherapy dose is actually a spatial distribution, and the one-dimensional water tank point dose measurement commonly used in the clinic cannot verify the accuracy of the spatial dose. In some plans with complex anatomical structures or non-standard beam directions, the point dose measurement of the one-dimensional water tank may cause the loss of part of the dose information due to the low spatial resolution, thereby affecting the verification accuracy.

[0003] At present, there is a lack of a dose measurement device for radiotherapy dose in different dimensions. UTILITY MODEL CONTENT

[0004] In view of the problems in the prior art, the utility model provides a multi-dimensional radiotherapy dose measurement device, which solves at least one of the above technical problems.

[0005] The technical scheme of the utility model is as follows: a multi-dimensional radiotherapy dose measurement device, characterized in that a multifunctional water tank is arranged, a plurality of installation grooves are arranged on the bottom plate of the multifunctional water tank in a matrix mode, a thermoluminescence dosimeter is arranged in each installation groove, and a film insertion groove for inserting a film is arranged at the bottom of the inner wall of the multifunctional water tank.

[0006] Three installation holes with different heights are arranged on the side plate of the multifunctional water tank, the installation holes are used for connecting ionization chamber plugs or water tank plugs, and the water tank plugs are used for plugging the installation holes.

[0007] The ionization chamber plug is used for mounting an ionization chamber, and a through hole for inserting the ionization chamber is arranged on the ionization chamber plug.

[0008] A bearing bottom plate is further arranged, a plurality of bearing grooves are arranged on the bearing bottom plate in a matrix mode, a thermoluminescence dosimeter is arranged in each bearing groove, and the bearing grooves are arranged in one-to-one correspondence with the installation grooves.

[0009] The multifunctional water tank and the bearing bottom plate are arranged in a stacked mode.

[0010] The utility model optimizes the structure of the water tank, greatly improves the dimensionality of dose measurement compared with the traditional one-dimensional water tank, and can realize one-dimensional point dose measurement, two-dimensional surface dose measurement and three-dimensional spatial dose measurement.

[0011] Further preferably, the thickness of the film slot is 1mm.

[0012] Further preferably, the inner wall of the mounting hole is provided with internal threads.

[0013] The ionization chamber plug or the water tank plug is provided with external threads for threadedly connecting the internal threads.

[0014] Further preferably, the vertical projections of the three mounting holes do not coincide.

[0015] Avoiding interference between the ionization chambers after the ionization chambers are inserted.

[0016] Further preferably, the stack unit is further provided with a docking plate, the docking plate is in a square box structure, and the docking plate is stacked on the bearing bottom plate to form a stack unit.

[0017] The multifunctional water tank is overlapped above at least one stack unit.

[0018] Further preferably, the bearing bottom plate comprises a base plate, and the bearing slot is formed in the base plate.

[0019] An extension part extending upward is arranged at the outer edge of the base plate, and the insertion port is formed in the extension part.

[0020] A protrusion corresponding to the insertion port is arranged at the bottom of the docking plate.

[0021] A top notch corresponding to the protrusion is arranged at the top of the docking plate.

[0022] A protrusion structure embedded in the top notch is arranged at the bottom of the multifunctional water tank.

[0023] Convenient for stacking.

[0024] Further preferably, the height of the docking plate is 10mm, 20mm, 50mm or 100mm.

[0025] Convenient for switching different sizes of docking plates.

[0026] Further preferably, the diameter of the mounting slot and the bearing slot is 5mm, and the depth is 5mm.

[0027] Further preferably, the distance between the center of the three mounting holes and the bottom plate of the multifunctional water tank is 200mm, 150mm and 50mm.

[0028] The lateral distance between the centers of the three mounting holes is 65mm.

[0029] Further preferably, a scale line is engraved on the inner wall of the multifunctional water tank.

[0030] Reference depth by scale line for adding water.

[0031] Compared with the prior art, the multifunctional water tank has the beneficial effects that:

[0032] The multifunctional water tank can be used alone, when the ionization chamber plug is installed in the mounting hole, the ionization chamber is inserted into the ionization chamber plug, water is filled in the multifunctional water tank, and one-dimensional radiotherapy point dose measurement can be realized.

[0033] The multifunctional water tank can be used alone, when the ionization chamber plug is installed in the mounting hole, the ionization chamber is inserted into the ionization chamber plug, water is filled in the multifunctional water tank, and one-dimensional radiotherapy point dose measurement can be realized.

[0034] The multifunctional water tank can be used alone, when the ionization chamber plug is installed in the mounting hole, the ionization chamber is inserted into the ionization chamber plug, water is filled in the multifunctional water tank, and one-dimensional radiotherapy point dose measurement can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a exploded view of the embodiment 1 of the utility model;

[0036] Figure 2 It is a exploded view of the embodiment 1 of the utility model;

[0037] Figure 3 It is a structural schematic view of the embodiment 1 of the utility model;

[0038] Figure 4 It is a structural schematic view of the ionization chamber plug of the embodiment 1 of the utility model;

[0039] Figure 5 It is a structural schematic view of the docking plate of the embodiment 1 of the utility model;

[0040] Figure 6 It is a local schematic view of the film insertion slot of the embodiment 1 of the utility model;

[0041] Figure 7 It is a structural schematic view of the water tank plug of the embodiment 1 of the utility model.

[0042] In the drawing, 1 is multifunctional water tank, 2 is ionization chamber plug, 3 is water tank plug, 4 is docking plate, 5 is bearing bottom plate, 11 is mounting groove, 12 is film insertion slot, 41 is upper notch, 42 is protrusion, 51 is bearing groove. DETAILED DESCRIPTION

[0043] Referring toFigures 1 to 7 In specific embodiment 1, a multi-dimension radiotherapy dose measurement device comprises a multifunctional water tank 1, a matrix arranged mounting groove 11 is arranged on the bottom plate of the multifunctional water tank 1, the mounting groove 11 is used for placing a thermoluminescence dosimeter, a film insertion slot 12 for inserting a film is arranged on the bottom of the inner wall of the multifunctional water tank 1; three mounting holes with different heights are arranged on the side plate of the multifunctional water tank 1, the mounting holes are used for connecting an ionization chamber plug 2 or a water tank plug 3; the ionization chamber plug 2 is used for mounting the ionization chamber, the water tank plug 3 is used for plugging the mounting hole; a through hole for inserting the ionization chamber is arranged on the ionization chamber plug 2; further comprising a bearing bottom plate 5, the bearing bottom plate 5 is arranged with a matrix arranged bearing groove 51, the bearing groove 51 is used for placing the thermoluminescence dosimeter, the bearing groove 51 is arranged in one-to-one correspondence with the mounting groove 11; the multifunctional water tank and the bearing bottom plate are arranged in a stacked manner.

[0044] The utility model discloses a structure of water tank is optimized, relative to traditional one -dimensional water tank, the dimensionality of dose measurement has been greatly improved.

[0045] The film insertion slots of the four side plates of the multifunctional water tank 1 are connected in a surrounding manner to form a character-shaped slot.

[0046] The thickness of the film insertion slot is 1mm.

[0047] The inner wall of the mounting hole is provided with internal threads; the ionization chamber plug 2 or the water tank plug 3 is provided with external threads for connecting the internal threads.

[0048] The vertical projections of the three mounting holes do not coincide. After the ionization chamber is inserted, the upper and lower interference between multiple ionization chambers is avoided.

[0049] Referring to Figure 2 , Figure 3 and Figure 5 , further comprising a butt joint plate 4, the butt joint plate 4 is in a square box structure, the butt joint plate 4 and the bearing bottom plate 5 are stacked to form a stacked unit; the multifunctional water tank 1 is overlapped above at least one stacked unit. The bearing bottom plate 5 comprises a base plate, the base plate is provided with a bearing groove; the outer edge of the base plate is provided with an upwardly extending extension, the extension is provided with a plug-in port; the bottom of the butt joint plate 4 is provided with a protrusion 42 matched with the plug-in port; the top of the butt joint plate 4 is provided with an upper notch 41 matched with the protrusion; the bottom of the multifunctional water tank 1 is provided with a protruding structure embedded in the upper notch. It is convenient to stack. The bottom of the bearing bottom plate located at the lowermost position can not be provided with a protrusion. The bottom of the bearing bottom plate clamped between the lowermost bearing bottom plate and the water tank is provided with a protrusion matched with the upper notch.

[0050] The height of the butt joint plate 4 is 10mm, 20mm, 50mm or 100mm. It is convenient to switch different sizes of butt joint plates 4.

[0051] The diameter of the installation groove 11 and the bearing groove 51 is 5 mm, and the depth is 5 mm.

[0052] The distance from the center of the three installation holes to the bottom plate of the multifunctional water tank 1 is 200 mm, 150 mm and 50 mm; the lateral spacing of the centers of the three installation holes is 65 mm.

[0053] The inner wall of the multifunctional water tank 1 is engraved with a scale line. When adding water, the scale line is used as a reference depth.

[0054] The ionization chamber plug 2 comprises a plug-in part, a threaded mounting part and a limiting part connected in sequence, the plug-in part comprises a first circular tube segment, a second circular tube segment, a third circular tube segment and a fourth circular tube segment arranged in sequence from inside to outside; the inner diameter of the first circular tube segment is 7.1 mm, and the axial length is 26 mm; the inner diameter of the second circular tube segment is 8.65 mm, and the axial length is 53.6 mm; the inner diameter of the third circular tube segment is 11.05 mm, and the axial length is 9.5 mm; the inner diameter of the fourth circular tube segment is 12.65 mm, and the axial length is 75.9 mm; the wall thickness of the plug-in part is 1 mm; the axial length of the threaded mounting part is 10 mm, and the outer diameter of the threaded mounting part is 20 mm; the diameter of the limiting part at the maximum outer diameter is 40 mm, and the axial length of the limiting part is 20 mm. The end of the first circular tube segment away from the second circular tube segment is sealed.

[0055] The water tank plug 3 comprises a spiral part and a rotating handle connected in sequence; the spiral part is threadedly connected with the installation hole; the axial length of the threaded part is 10 mm, and the outer diameter of the threaded mounting part is 20 mm; the diameter of the rotating handle at the maximum outer diameter is 40 mm, and the axial length of the limiting part is 20 mm.

[0056] Use method:

[0057] One-dimensional point dose measurement: the multifunctional water tank 1 can be used alone.

[0058] Install the ionization chamber plug 2 in the three installation holes, insert three ionization chambers into the ionization chamber plug 2, fill water into the multifunctional water tank 1, add water to the 250 mm scale, and at the same time, level the water tank. Adjust the position of the treatment bed and the water tank, so that the source-skin distance of the water surface is 1000 mm, ensure that the center of the upper surface of the water tank is aligned with the center of the accelerator, and make the edge of the water tank aligned with the accelerator laser and kept horizontal. Set the accelerator field size to 100 mm×100 mm, and adjust the gantry angle and the collimator angle to 0 degree. Beam out and measure the point dose at different water depths at the same time. One-dimensional radiotherapy point dose measurement at three different water depths commonly used in clinic can be realized.

[0059] Two-dimensional surface dose measurement:

[0060] The multifunctional water tank 1 can be used alone, and is placed on an accelerator treatment bed and leveled. When the water tank is installed in the installation hole and blocked, a film is inserted in the film slot, and water is filled in the multifunctional water tank 1, the measurement of the two-dimensional radiotherapy surface dose can be realized.

[0061] Three-dimensional space dose measurement:

[0062] The multifunctional water tank 1 is stacked with at least two stacked units below, and is placed on an accelerator treatment bed and leveled. The space in the docking plate 4 is required to be placed with solid water, animal tissue or empty according to the measurement environment, and the thermoluminescent dosimeter is placed in the bearing groove 51 of the bearing plate 5, so that the radiotherapy treatment dose of the three-dimensional space can be measured through the thermoluminescent dosimeters at different positions of different bearing plates.

[0063] Alternatively, the multifunctional water tank 1 is stacked with at least three bearing plates arranged from top to bottom below. The gap between adjacent bearing plates is placed with animal tissue slices. The thermoluminescent dosimeter is placed in the bearing groove 51 of the bearing plate 5, so that the radiotherapy treatment dose of the three-dimensional space can be measured through the thermoluminescent dosimeters at different positions of different bearing plates.

[0064] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the technical field, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A multi-dimensional radiotherapy dose measurement device, characterized in that: The multifunctional water tank is provided with matrix arranged installation slots on the bottom plate, and the installation slots are used for placing the thermoluminescence dosimeter. Three installation holes with different heights are arranged on the side plate of the multifunctional water tank, and the installation holes are used for connecting the ionization chamber plug or the water tank plug. The ionization chamber plug is used for installing the ionization chamber, and the ionization chamber plug is provided with a through hole for inserting the ionization chamber. The bearing bottom plate is provided with matrix arranged bearing slots for placing the thermoluminescence dosimeter, and the bearing slots are arranged one by one corresponding to the installation slots. The multifunctional water tank and the bearing bottom plate are arranged in a stack.

2. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The thickness of the film insertion slot is 1mm.

3. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The inner wall of the installation hole is provided with an internal thread. The ionization chamber plug or the water tank plug is provided with an external thread for threadedly connecting the internal thread.

4. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The vertical projections of the three installation holes do not coincide.

5. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The butt joint plate is in a square box structure, and the butt joint plate and the bearing bottom plate are arranged in a stack to form a stack unit. The multifunctional water tank is overlapped above at least one stack unit.

6. The multi-dimensional radiation therapy dose measuring device of claim 5, wherein: The bearing bottom plate comprises a base plate provided with the bearing slots. The outer edge of the base plate is provided with an upwardly extending extension, and the extension is provided with an insertion port. The bottom of the butt joint plate is provided with a protrusion matched with the insertion port. The top of the butt joint plate is provided with an upper notch corresponding to the protrusion. The bottom of the multifunctional water tank is provided with a protruding structure embedded in the upper notch.

7. The multi-dimensional radiation therapy dose measuring device of claim 5, wherein: The height of the butt joint plate is 10mm, 20mm, 50mm or 100mm.

8. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The diameter of the installation slot and the bearing slot is 5mm, and the depth is 5mm.

9. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The distance between the center of the three installation holes and the bottom plate of the multifunctional water tank is 200mm, 150mm and 50mm. The lateral distance between the centers of the three installation holes is 65mm.

10. The multi-dimensional radiation therapy dose measuring device of claim 1, wherein: The inner wall of the multifunctional water tank is engraved with scale lines.

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