Head and neck treatment bed board special for proton radiotherapy
By designing an integrated proton radiotherapy bed, the problems of unstable fixation and large variations in the water equivalent thickness were solved, achieving stable fixation and uniform water equivalent thickness, thus improving the accuracy and safety of proton radiotherapy.
Patent Information
- Application Number
- CN202422984123.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing proton radiotherapy bed plates are not securely fixed in the head and neck area, resulting in poor repeatability and large variations in the water equivalent thickness. This affects the proton range and dose distribution, leading to a decrease in tumor control rate and damage to normal tissues.
A head and neck treatment bed board specifically designed for proton radiotherapy was designed. It adopts an integrated base plate and head, neck and shoulder placement plate, with protruding columns and multiple through holes. Combined with carbon fiber material, it ensures stable fixation and uniform water equivalent thickness, reducing proton range and penumbra effects.
It achieves stable fixation and good repeatability in patients with head and neck conditions, with minimal proton range and penumbra effect, ensuring accurate dose distribution and improving the efficacy of tumor treatment and patient safety.
Smart Images
Figure CN223682932U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a head and neck treatment bed board formula for proton radiotherapy. BACKGROUND
[0002] Proton radiotherapy is a kind of technique of precision radiotherapy, and the current mainly adopts pencil beam scanning irradiation method.Different from conventional photon radiotherapy, proton is charged particle, and the interaction between proton beam and medium exists uncertainty in range, and it is crucial to accurately determine and keep the water equivalent thickness of the water equivalent thickness on the path of proton beam flow including bed board.In addition, the head and neck tumor has the characteristics that there is strict safety boundary near the target area, and the dose gradient near the critical organ is particularly steep.
[0003] At present, the water equivalent thickness of the commercial bed board changes greatly in the part area of beam flow, and the repeatability is poor for the neck only using groove design to place headrest, and the water equivalent thickness of the fixed thermoplastic film fixed on the bottom plate by protruding buckle changes greatly compared with the bottom plate around the buckle, and the patient positioning repeatability is poor, which can cause significant deviation of proton range and penumbra.
[0004] The deviation of proton range and penumbra directly affects the dose distribution in the patient's body, which may cause insufficient dose of tumor target area or important critical organ dose exceeding the safety value, resulting in the decrease of tumor control rate and normal tissue damage.
[0005] As a kind of method of precision radiotherapy, intensity modulated proton radiotherapy using pencil beam scanning irradiation is developing rapidly.The technology can deliver accurate and conformal dose to the target area, while minimizing the irradiation of surrounding normal tissues and organs, and the technology is sensitive to the WET change of patient fixation equipment.
[0006] The process of proton therapy includes patient fixation, CT scanning, target area and critical organ delineation, treatment plan design, plan verification, treatment implementation and follow-up evaluation.
[0007] In order to fully exert the advantages of proton therapy, one of the key steps is patient fixation, which needs to keep them in a stable and repeatable position at each treatment.
[0008] Proton passes through the bed plate of the fixed patient and interacts with the material, which will affect the range of proton, and also affect the penumbra of proton beam, which may change the range of proton and directly affect the dose distribution
[0009] The head and neck patient will use a special bed plate when fixed.During the design of treatment plan, in order to better protect normal tissues, the back field and the back oblique field penetrating the bed plate are usually selected.
[0010] The bed board currently commonly used for proton head and neck radiotherapy is produced by Qfix Company, which has many advantages but also has significant defects. First, the headrest is not firmly fixed on the bed board, and the repeatability is poor. Second, the water equivalent thickness (WET) of the neck position of the bed board changes greatly from the edge to the middle. In addition, the thermoplastic film is fixed on the bed board by a bayonet, and the water equivalent thickness WET of the bayonet and the surrounding bed board also changes significantly, which significantly changes the proton penumbra after the proton passes through, and seriously affects the accurate dose distribution in the patient's body. Content of the utility model
[0011] The utility model aims at providing a head and neck treatment bed board special for proton radiotherapy, which realizes lightweight while maintaining strength.
[0012] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme.
[0013] A head and neck treatment bed board special for proton radiotherapy, comprising a bottom plate, the top of the bottom plate is integrally connected with a head and neck shoulder placing plate, a convex column is fixed on the bottom plate close to the head and neck shoulder placing plate, two convex columns are symmetrically arranged about the middle part of the bottom plate, the convex column is designed as hollow, a recessed hole is arranged in the head and neck shoulder placing plate, a first through hole is arranged on the edge of the head and neck shoulder placing plate, a second through hole is arranged on the edge of the bed board, and a third through hole is arranged close to the middle part of the bed board.
[0014] Further, the recessed hole is arranged obliquely, and the support angle between the side surface of the recessed hole and the head and neck shoulder placing plate is greater than 60 degrees.
[0015] Further, the first through hole is provided with 12 first through holes.
[0016] Further, the third through hole is symmetrically arranged about the middle part of the bed board, and two pairs of third through holes are arranged along the length direction of the bed board.
[0017] To sum up, the utility model has the beneficial technical effects that the utility model is integrally made, the physical thickness of the bottom plate changes little in the horizontal and vertical directions, the special convex column is arranged for fixing the headrest, the headrest is more stable, the range and the penumbra influence after the proton passes through are small, the water equivalent thickness change gradient of the bed board is small at the left and right positions of the neck, and various functional holes are reserved on the bed board and the head and neck shoulder placing plate, so that the whole can be conveniently installed on the CT simulator and the proton treatment bed for use. DETAILED DESCRIPTION
[0018] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and do not constitute a limitation on the utility model. In the drawings:
[0019] Fig. 1It is a plane structure schematic view of a head and neck treatment bed plate special for proton radiotherapy of the embodiment;
[0020] Fig. 2 It is a side structure schematic view of a head and neck treatment bed plate special for proton radiotherapy of the embodiment.
[0021] In the figure, 1 is a bottom plate; 2 is a head and neck shoulder placing plate; 3 is a convex column; 4 is a concave hole; 5 is a first through hole; 6 is a second through hole; and 7 is a third through hole. DETAILED DESCRIPTION
[0022] The utility model will be described further in detail below in combination with the drawings.
[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range protected by the utility model.
[0024] Please refer to Figs. 1-2 The utility model provides technical scheme: a head and neck treatment bed plate special for proton radiotherapy, including bottom plate 1, the bottom plate 1 top integration is connected with head and neck shoulder placing plate 2, the bottom plate 1 is close to head and neck shoulder placing plate 2 and is fixed with convex column 3, and the two symmetric of convex column 3 about the middle part of bottom plate 1 are provided, and the hollow setting of convex column 3 is provided, the inside of head and neck shoulder placing plate 2 is equipped with concave hole 4, and head and neck shoulder placing plate 2 is equipped with first through hole 5 near the edge, and the edge of bed plate is equipped with second through hole 6, and third through hole 7 is equipped near the middle part position of bed plate.
[0025] Among them, the concave hole 4 is inclined to set, and the support angle between the side of the concave hole 4 and the head and neck shoulder placing plate 2 is greater than 60 degrees, and in the embodiment, it is specifically set to 70 degrees.
[0026] Specifically, the inner diameter of the convex column 3 is 3mm, the outer diameter is 6mm, and the height is 8mm.
[0027] Among them, the first through hole 5 is provided with 12, and the third through hole 7 is symmetrically arranged about the middle part of the bed plate, and the third through hole 7 is provided with two pairs along the length direction of the bed plate, a total of four third through holes 7, and the second through hole 6 is provided near the edge of the bed plate, and two are provided on each side of the bed plate.
[0028] The first through hole 5 is used for fixing the thermoplastic film, and the buckle on the end patch of the thermoplastic film can be inserted into the first through hole 5 for fixation during fixation; the second through hole 6 is used for expanding the installation of structures such as handrails; and the third through hole 7 is used for fixing the bed plate on the CT bed and the proton therapy bed by using the general type Lock bar.
[0029] The working principle of the utility model is: two convex columns 3 are used for inserting and fixing headrest, the convex column 3 is hollow design, the edge of head neck shoulder placing plate 2 is fixed with thermoplastic film through first through hole 5, bed plate is fixed on CT bed and proton therapy bed through third through hole 7, and it is used for proton radiotherapy.
[0030] The plate surface material of the bed plate is carbon fiber, and the head neck shoulder placing plate 2 is internally provided with recess hole 4, so that the overall strength of the bed plate is high, and the water equivalent thickness is small.
[0031] It should be noted that in this text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such process, method, article or apparatus.
[0032] Finally, it should be noted that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement for part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A head and neck treatment couch top dedicated for proton radiotherapy, characterized in that, The utility model relates to a head, neck and shoulder placing board, including bottom plate (1), the head, neck and shoulder placing board (2) of one body connection is integrated in bottom plate (1) top, bottom plate (1) is fixed with convex post (3) near head, neck and shoulder placing board (2), and two are symmetrically equipped with in convex post (3) about the middle part of bottom plate (1), and the hollow setting of convex post (3), the recess (4) is equipped with in head, neck and shoulder placing board (2) inside, and the first through -hole (5) is equipped with in head, neck and shoulder placing board (2) near edge, and the second through -hole (6) is equipped with in bed board edge, and the third through -hole (7) is equipped with in bed board near middle part position.
2. The head and neck treatment couchtop dedicated for proton radiotherapy according to claim 1, characterized in that, The recess (4) is arranged obliquely, and the side surface of the recess (4) forms an angle of greater than 60° with the support of the head, neck and shoulder placing board (2).
3. The head and neck treatment couchtop dedicated for proton radiotherapy according to claim 2, characterized in that, The first through -hole (5) is provided with 12.
4. The head and neck treatment couchtop dedicated for proton radiotherapy of claim 1, wherein, The third through -hole (7) is symmetrically arranged about the middle part of the bed plate, and two pairs of third through -holes (7) are arranged along the length direction of the bed plate.