Pressing plate device of self-developing film

Abstract

The utility model discloses a pressing plate device of a self-developing film, which is characterized by comprising an upper pressing plate, a lower pressing plate and a fixing assembly, the upper pressing plate is provided with optical glass, and the self-developing film is placed between the upper pressing plate and the lower pressing plate; the fixing assembly comprises magnetic alloy, and the magnetic alloy is arranged on the peripheral walls of the upper pressing plate and the lower pressing plate correspondingly. When in use, an operator places a self-developing film on the lower pressing plate, and then buckles the upper pressing plate on the lower pressing plate, so that the magnetic alloys in the upper pressing plate and the lower pressing plate attract each other, the upper pressing plate and the lower pressing plate are completely attached to the self-developing film, an air gap between the film and optical glass is eliminated, an image Newton ring is reduced, and the imaging quality is improved. The accuracy of positioning of the self-developing film and the accuracy of dose verification are improved, the scanning quality of verification of the self-developing film is improved, and a guarantee is provided for treatment safety and effectiveness of a patient.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, and more specifically, to a pressing device for autoradiographic films. Background Technology

[0002] CyberKnife, as a specialized device for stereotactic radiotherapy, employs non-coplanar and non-isocentric beam irradiation, enabling a high-dose distribution pattern within the tumor and a low-dose distribution outside the tumor. The irradiation method of non-isocentric and non-coplanar beams is more complex, making it impossible to verify the planar dose using conventional two-dimensional ionization chamber matrices or semiconductor matrices. Therefore, verification can only be performed using autoradiographic EBT3 film.

[0003] Autoradiographic films must first be scanned into electronic images before they can be recognized by backend film analysis software for dosimetric comparison and analysis. Therefore, the quality of the scanned film image is directly related to the accuracy of dose analysis. However, due to improper storage or heating after irradiation, EBT3 film is prone to deformation, often exhibiting warping. This results in tiny air gaps or unevenness between the film surface and the scanner glass during scanning. When scanning light passes through these air gaps, reflection and interference occur, forming alternating bright and dark concentric circular fringes (Newton's rings). The presence of Newton's rings not only affects the uniformity of film development but also interferes with the accuracy of film optical density readings, introducing errors into the film analysis results. Furthermore, image processing software struggles to accurately separate dose information and interference fringes, further increasing the complexity of data processing. The presence of Newton's rings not only reduces the accuracy and reliability of film validation results but also increases the difficulty of data processing and analysis. Therefore, for patient dose validation based on autoradiographic films, the primary task is to address the interference of Newton's rings.

[0004] Currently, the most common method to address the Newton's rings problem is to directly press optical glass onto the film during scanning. The optical glass flattens the film through physical pressure, reducing the air gap between the film and the scanner glass. Furthermore, the high flatness and light transmittance of the optical glass surface reduce some light interference, thus mitigating the Newton's rings effect. However, the high flatness of the optical glass surface can also cause strong specular reflections, leading to artifacts or reflected light interfering with the scanner's optical system and causing image distortion. Additionally, the placement and orientation of the film during scanning are critical; the short side of the EBT3 film must be parallel to the scanning direction. However, directly pressing optical glass onto the film causes film displacement, resulting in inconsistent response of the film's photosensitive crystal, ultimately affecting the accuracy and authenticity of film verification.

[0005] Therefore, how to provide a pressing device for self-developing film has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] One objective of this invention is to provide a new technical solution for a self-developing film pressing device.

[0007] According to a first aspect of the present invention, a pressing device for self-developing film is provided, comprising: an upper pressing plate, a lower pressing plate and a fixing component, wherein the upper pressing plate is provided with optical glass, and the space between the upper pressing plate and the lower pressing plate is used for placing self-developing film;

[0008] The fixing component includes a magnetic alloy, which is respectively disposed on the outer peripheral walls of the upper pressure plate and the lower pressure plate.

[0009] Optionally, the upper pressure plate is provided with a mounting port, and the optical glass is disposed in the mounting hole.

[0010] Optionally, the surface of the optical glass is frosted.

[0011] Optionally, the surface of the optical glass is provided with an anti-reflective coating.

[0012] Optionally, the optical glass is 7 inches long, 9 inches wide, and 3 millimeters high; the upper pressure plate and the lower pressure plate are 8 inches long, 10 inches wide, and 3 millimeters thick.

[0013] Optionally, the inner wall of the lower pressure plate and the inner wall of the upper pressure plate are both provided with a transparent film, which is smooth and easily adsorbed.

[0014] Optionally, the transparent film is made of silicone.

[0015] Optionally, the fixing assembly further includes a connecting rod, a rotating rod, a limiting post, a first fixing hole, and a second fixing hole, wherein the first fixing hole and the second fixing hole are respectively disposed on the side walls of the upper pressure plate and the lower pressure plate;

[0016] The connecting rod is elastic, and its two ends are perpendicularly connected to the rotating rod and the limiting post, respectively. The rotating rod and the limiting post are respectively inserted into the first fixing hole and the second fixing hole.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention features an optical glass plate on an upper pressure plate and magnetic alloys disposed on the outer peripheral walls of both the upper and lower pressure plates. In use, the operator places the autoradiographic film on the lower pressure plate and then snaps the upper pressure plate onto it. This causes the magnetic alloys in the upper and lower pressure plates to attract each other, ensuring complete contact between the upper and lower pressure plates and the autoradiographic film. This eliminates air gaps between the film and the optical glass, reduces Newton's rings in the image, improves the accuracy of autoradiographic film placement and dosage verification, and enhances the quality of autoradiographic film scanning, thus ensuring the safety and effectiveness of patient treatment.

[0019] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a structural diagram of the self-developing film pressing plate device of this utility model;

[0022] Figure 2 This is a structural diagram of the self-developing film pressing plate device of this utility model from another angle;

[0023] Figure 3 This is a cross-sectional view of the self-developing film pressing plate device of this utility model;

[0024] Figure 4 This is a structural diagram of the fixing component of this utility model.

[0025] The following are marked in the diagram: 1. Upper pressure plate; 11. Mounting port; 2. Lower pressure plate; 3. Optical glass; 4. Fixing component; 41. Magnetic alloy; 42. Connecting rod; 43. Rotating rod; 44. Limiting post; 5. Transparent film; 6. Self-developing film. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] like Figures 1 to 4 As shown, this utility model embodiment provides a pressure plate device for self-developing film, including: an upper pressure plate 1, a lower pressure plate 2 and a fixing component 4. The upper pressure plate 1 is provided with optical glass 3, and the space between the upper pressure plate 1 and the lower pressure plate 2 is used to place the self-developing film 6.

[0031] The fixing component 4 includes a magnetic alloy 41, which is respectively disposed on the outer peripheral walls of the upper pressure plate 1 and the lower pressure plate 2.

[0032] Specifically, the outer edges of the upper pressure plate 1 and the lower pressure plate 2 are respectively provided with a first cavity and a second cavity, and the magnetic alloy 41 is respectively disposed in the first cavity and the second cavity. It should be noted that the first cavity and the second cavity can be provided at intervals on the outer edges of the upper pressure plate 1 and the lower pressure plate 2, or they can be provided continuously, and there is no limitation here.

[0033] In addition, the magnetic alloy 41 can also be disposed on the outer edge of the optical glass 3 to cover the outer edge of the optical glass 3.

[0034] Moreover, the magnetic alloy 41 does not have a very strong attraction force. It can apply force to the self-developing film 6 to adjust the position of the film, so that the self-developing film 6 is aligned with the outer contours of the upper pressure plate 1 and the lower pressure plate 2, and completely overlaps with the upper pressure plate 1 and the lower pressure plate 2.

[0035] The magnetic pressure plate structure of this invention makes operation simpler and easier, reduces the number of times the self-developing film 6 needs to be adjusted, and is very suitable for routine dose verification processes.

[0036] This invention features an optical glass 3 mounted on an upper pressure plate 1, and magnetic alloy 41 disposed on the outer peripheral walls of both the upper and lower pressure plates 1 and 2. In use, the operator places the autoradiographic film 6 onto the lower pressure plate 2, then snaps the upper pressure plate 1 onto the lower pressure plate 2, causing the magnetic alloy 41 in both plates to attract each other, thus completely bonding the upper and lower pressure plates 1 and 2 to the autoradiographic film 6. This eliminates air gaps between the film and the optical glass 3, reduces Newton's rings in the image, improves the accuracy of the autoradiographic film 6 placement and dosage verification, and enhances the quality of the autoradiographic film 6 scan, thereby ensuring the safety and effectiveness of patient treatment.

[0037] In one embodiment of the self-developing film pressing device of this utility model, such as Figures 1 to 3 As shown, the upper pressure plate 1 is provided with a mounting port 11, and the optical glass 3 is placed in the mounting hole.

[0038] Furthermore, the optical glass 3 is 7 inches long, 9 inches wide, and 3 millimeters high; the upper pressure plate 1 and the lower pressure plate 2 are 8 inches long, 10 inches wide, and 3 millimeters thick.

[0039] Specifically, the dimensions of the upper pressure plate 1 and the lower pressure plate 2 are equal to the dimensions of the self-developing film 6. The dimensions of the mounting opening 11 are larger than the dimensions of the optical glass 3. In this embodiment, a magnetic alloy 41 is wrapped around the outer edge of the optical glass 3, and the width of the magnetic alloy 41 is 1 inch. After the magnetic alloy 41 is wrapped around the outer edge of the optical glass 3, it is equal to the dimensions of the mounting opening 11, so that it can be stably placed within the mounting opening 11, and the self-developing film 6 can be observed through the optical glass 3.

[0040] Furthermore, the upper pressure plate 1 and the lower pressure plate 2 are rectangular structures. The design of the upper pressure plate 1 and the lower pressure plate 2 with right-angled sides ensures that the short side of the auto-developing film 6 is parallel to the scanning direction during each scan, thus ensuring the consistency of the scanning results.

[0041] In addition, optical glass 3 is also provided on the lower pressure plate 2, which makes it easier to pass through the self-developing film 6.

[0042] In one embodiment of the self-developing film pressing device of this utility model, the surface of the optical glass 3 is frosted. This frosted structure on the surface of the optical glass 3 can scatter light and disrupt the interference conditions.

[0043] In one embodiment of the self-developing film pressing device of this utility model, in order to avoid reflection artifacts, an anti-reflection coating is provided on the surface of the optical glass 3, thereby improving the authenticity of the scanning of the self-developing film 6.

[0044] In one embodiment of the self-developing film pressing device of this utility model, such as Figures 1 to 3 As shown, a transparent film 5 is provided on the inner wall of the lower pressure plate 2. Specifically, the transparent film 5 is also provided on the inner wall of the upper pressure plate 1. The transparent film 5 is smooth and easily adsorbed.

[0045] Furthermore, the transparent film 5 is made of silicone.

[0046] This invention provides transparent films 5 on the inner walls of both the lower pressure plate 2 and the upper pressure plate 1, making the transparent films 5 smooth and easy to absorb. This allows the optical glass 3 to better adhere to the self-developing film 6, preventing the formation of air bubbles and improving anti-interference capabilities.

[0047] In one embodiment of the self-developing film pressing device of this utility model, such as Figure 4 As shown, the fixing component 4 also includes a connecting rod 42, a rotating rod 43, a limiting post 44, a first fixing hole and a second fixing hole, which are respectively provided on the side walls of the upper pressure plate 1 and the lower pressure plate 2.

[0048] The connecting rod 42 is elastic, and its two ends are perpendicularly connected to the rotating rod 43 and the limiting post 44, respectively. The rotating rod 43 and the limiting post 44 are respectively inserted into the first fixing hole and the second fixing hole.

[0049] The first fixing hole and the second fixing hole can be set on the four side walls of the upper pressure plate 1 and the lower pressure plate 2, or they can be set on the two opposite side walls of the upper pressure plate 1 and the lower pressure plate 2.

[0050] This invention fixes the upper pressure plate 1 and the lower pressure plate 2 by respectively setting the first fixing hole and the second fixing hole on the side wall of the upper pressure plate 1 and the lower pressure plate 2, and vertically connecting the two ends of the connecting rod 42 to the rotating rod 43 and the limiting post 44 respectively. The rotating rod 43 and the limiting post 44 are inserted into the first fixing hole and the second fixing hole respectively, thereby fixing the upper pressure plate 1 and the lower pressure plate 2. This avoids the problem of inconsistent response of the photosensitive crystal of the self-developing film 6 caused by the movement of the upper pressure plate 1 and the lower pressure plate 2, which ultimately affects the accuracy and authenticity of the self-developing film 6 verification.

[0051] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pressing device for self-developing film, characterized in that, include: The upper pressure plate, the lower pressure plate, and the fixing assembly are provided. The upper pressure plate is provided with optical glass, and the space between the upper pressure plate and the lower pressure plate is used to place the autodeveloping film. The fixing component includes a magnetic alloy, which is respectively disposed on the outer peripheral walls of the upper pressure plate and the lower pressure plate.

2. The pressing device for self-developing film according to claim 1, characterized in that, The upper pressure plate is provided with a mounting port, and the optical glass is disposed in the mounting hole.

3. The pressing device for self-developing film according to claim 1, characterized in that, The surface of the optical glass is frosted.

4. The pressing device for self-developing film according to claim 1, characterized in that, The surface of the optical glass is provided with an anti-reflective coating.

5. The pressing device for self-developing film according to claim 1, characterized in that, The optical glass is 7 inches long, 9 inches wide, and 3 millimeters high; the upper pressure plate and the lower pressure plate are 8 inches long, 10 inches wide, and 3 millimeters thick.

6. The pressing device for self-developing film according to claim 1, characterized in that, The inner walls of both the lower pressure plate and the upper pressure plate are provided with transparent films, which are smooth and easily adsorbed.

7. The pressing device for self-developing film according to claim 6, characterized in that, The transparent film is made of silicone.

8. The pressing device for self-developing film according to claim 1, characterized in that, The fixing assembly also includes a connecting rod, a rotating rod, a limiting post, a first fixing hole, and a second fixing hole, the first fixing hole and the second fixing hole being respectively disposed on the side walls of the upper pressure plate and the lower pressure plate; The connecting rod is elastic, and its two ends are perpendicularly connected to the rotating rod and the limiting post, respectively. The rotating rod and the limiting post are respectively inserted into the first fixing hole and the second fixing hole.

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