CN211188826U

CN211188826U - Particle therapy auxiliary device based on 3D prints solution

Info

Publication number: CN211188826U
Application number: CN201921333803.3U
Authority: CN
Inventors: 沈庄明; 麦克·法利·莫耶; 林鹏裕; 陆嘉德
Original assignee: Shanghai Proton And Heavy Ion Hospital Co ltd
Current assignee: Shanghai Proton And Heavy Ion Hospital Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-08-07
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a particle therapy auxiliary device based on a 3D printing solution, which comprises a mainboard, wherein a plurality of ridge-type range modulators are arranged on the mainboard at equal intervals, and the four corners of the mainboard are respectively provided with a positioning hole; the ridge range modulator is of a pyramid-shaped structure with the cross section size sequentially reduced from bottom to top; the main board and the ridge type range modulator are printed and molded by a 3D printer, and the manufacturing materials are photosensitive resin materials; the utility model discloses a particle therapy auxiliary device prints the shaping based on 3D printing technique, and the precision is high, is convenient for make the intensity that the different material thickness's of ridged range modulator adjusted and control the particle beam and shine according to the characteristics of different patients, different target area positions and tumour change, has stronger individuation and precision.

Description

Particle therapy auxiliary device based on 3D prints solution

Technical Field

The utility model relates to a medical treatment field specifically is a particle therapy auxiliary device based on 3D prints solution.

Background

With the demands of precise particle (proton, heavy ion) therapy and patient-based personalized development, a radiotherapy physicist wants to customize a plurality of high-precision auxiliary devices in time to regulate the irradiation intensity of particle beams according to different patients, different target areas and the characteristics of tumor changes during the therapy process. These auxiliary devices include ridge filter devices (ridge filters). The ridge filter is a range modulator made up of several ridges. These ridges have different material thicknesses when facing the particle beam to vary the depth of penetration of the particle beam into the patient. For convenience of explanation, we will refer to the ridge filter arrangement herein as a filter.

A new design and manufacturing method for a particle therapy aid-filter has now been developed, wherein scattering effects and particle-nuclear interactions within the filter itself are taken into account, which effects are introduced in the design. In a particle beam transport system, a ridge filter device is used as a particle penetration depth range modulator. The design program predicts the three-dimensional dose distribution after the filter is combined with the scanning system to produce a three-dimensional uniformly Spread Out Bragg Peak (SOBP) to obtain a uniform physical dose region in the SOBP region three-dimensionally, measures are taken using the constructed filter to verify the uniformity, and comparing these with the design program's predictions, confirming that the predictions and measurements are consistent. For all produced SOBPs, it can be used clinically.

Due to the characteristics of high precision, customization and repeatable processing, the 3D printing technology is gradually used in various fields in recent years. In the medical industry, three-dimensional (3D) printing technology is mainly used to make some patient-specific models to assist in the formulation of surgical protocols, and also to make some prototypes of medical instruments to optimally design final products after testing feedback.

The auxiliary device required by the existing particle therapy has the conditions of individuation and insufficient precision, and can not well meet the use requirement.

Disclosure of Invention

An object of the utility model is to provide a particle therapy auxiliary device based on 3D prints solution to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a particle therapy auxiliary device based on 3D prints solution, includes the mainboard, and the equidistant a plurality of ridge type range modulators that are equipped with on the mainboard, mainboard four corners sets up a locating hole respectively.

Preferably, the ridge range modulator is a pyramid-shaped structure with a cross section size decreasing from bottom to top, and the arrangement and number of the pyramid-shaped structures can be determined according to clinical requirements, and are not limited to the arrangement mode of the drawings.

Preferably, the main board and the ridge type range modulator are printed and molded by a 3D printer, and the manufacturing material of the main board and the ridge type range modulator is photosensitive resin material.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a particle therapy auxiliary device prints the shaping based on 3D printing technique, and the precision is high, is convenient for make the intensity that the different material thickness's of ridged range modulator adjusted and control the particle beam and shine according to the characteristics of different patients, different target area positions and tumour change, has stronger individuation and precision.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the back of the main board of the present invention.

In the figure: 1. a main board; 2. a ridge range modulator; 3. and (7) positioning the holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a particle therapy auxiliary device based on 3D prints solution, includes mainboard 1, and the equidistant a plurality of ridge type range modulator 2 of being equipped with on

mainboard

1, 1 four corners of mainboard set up a locating hole 3 respectively.

Furthermore, the ridge range modulator 2 is a pyramid-shaped structure with the cross-sectional size decreasing from bottom to top, and the arrangement and number of the pyramid-shaped structures can be determined according to clinical requirements, and is not limited to the arrangement mode of the drawings

Further, the main board 1 and the ridge-type range modulator 2 are printed and molded by a 3D printer, and the manufacturing material is photosensitive resin material.

The specific 3D printing solution of the particle therapy auxiliary device comprises the following specific steps:

s1: designing a device: the shape and size parameters of the auxiliary device are preliminarily designed by a radiotherapy physicist, and the influence of the device on treatment in actual use is estimated by utilizing simulation software to carry out design optimization; (Physician designs a single ridge range modulator into a pyramid shape first, and optimizes the pyramid by using Monte Carlo N-particle transport Code (NCNP) to obtain the pyramid size parameters such as layer number, layer height, layer width, etc.)

S2: three-dimensional modeling: after the radiotherapy physicist finishes the design, a three-dimensional model of the device is modeled by using computer aided design software;

s3: and (3) confirming a model: after three-dimensional modeling, confirming by a radiotherapy physicist that no errors exist, and storing a file in a standard triangular patch language format for later use;

s4: printing pretreatment: before the model is manufactured, the following pretreatment is carried out on the three-dimensional model:

s41: position adjustment: after a three-dimensional model of a standard triangular patch language format file obtained by modeling is imported into printing preprocessing software, the three-dimensional model is translated to a Z-axis default position and then translated to the center of a working platform (the precision of the center of the working platform of the 3D printer is relatively high);

s42: and (3) model correction: automatically checking geometric topological errors such as gaps, holes, overlapping, triangular surface patch crossing, bad edges and the like in the model one by one, and repairing the errors by utilizing a repairing tool provided by printing preprocessing software;

the method comprises the steps of S43, generating support, adding a support structure for a three-dimensional model, providing a tool for automatically generating a corresponding support structure by utilizing printing preprocessing software, and modifying according to needs, wherein the support structure is added for the three-dimensional model because a Stereolithography Apparatus (S L A) 3D printer is used in the solution, the support structure is required to be added for the three-dimensional model, a buffer is built between the three-dimensional model and is convenient to take down from the working platform when the production is completed by the support structure, meanwhile, the support structure can support a suspended part, restrain a cantilever structure to prevent deformation, and reinforce the model to prevent collapse due to gravity center)

S44, slicing the three-dimensional model and the corresponding support structure, and respectively storing the sliced data of the three-dimensional model and the corresponding support structure as a ci.ci file and a ci.s.ci file in a universal layer interface C L I file format;

s5: making a model: the automatic making of the model in the 3D printer by taking the photosensitive resin material as the raw material is specifically as follows: at the beginning, the working platform is positioned at a layer thickness height below the liquid level of the resin, the layer of liquid photosensitive resin is scanned and cured by the laser beam, and a required first layer of thin layer of solid section profile is formed, then the working platform descends by a layering thickness, the liquid photosensitive resin in the resin tank flows into the cured section profile layer, the scraper moves back and forth according to the set layering thickness to scrape off redundant liquid resin, then the laser beam scanning and curing are carried out on the newly paved layer of liquid resin, a second layer of required solid section profile layer is formed, the newly cured layer is adhered on the previous layer, and the steps are repeated until the whole model is manufactured;

s6: and (3) post-printing treatment: and after the model is manufactured, taking the formed auxiliary device off a working platform of the 3D printer by using a shovel, cleaning the auxiliary device in 95% ethanol solution, removing a supporting structure carried by the auxiliary device, polishing the auxiliary device by using sand paper, taking the cleaned auxiliary device out of the ethanol solution, drying the auxiliary device in the air, and further curing and forming the auxiliary device in an ultraviolet curing box for 10-20 min.

The design program of the auxiliary device uses a 3D printer and software of a commodity class, the application of the design program leads to the reduction of the cost of consumables, the acceleration of delivery speed, the improvement of quality by improving precision and the expansion of the application range of 3D printing, and a radiotherapy physicist can quickly develop and manufacture a new auxiliary device for radiotherapy to treat patients.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a particle therapy auxiliary device based on 3D prints solution, its characterized in that includes mainboard (1), and equidistant a plurality of ridge type range modulators (2) of being equipped with on mainboard (1), mainboard (1) four corners sets up a locating hole (3) respectively.

2. The 3D printing solution based particle therapy assisting device according to claim 1, characterized in that: the ridge-type range modulator (2) is of a pyramid-shaped structure with the cross section size decreasing from bottom to top in sequence.

3. The 3D printing solution based particle therapy assisting device according to claim 1, characterized in that: the main board (1) and the ridge type range modulator (2) are printed and formed by a 3D printer, and the manufacturing material of the main board is photosensitive resin material.