A bone density grayscale value calibration module

Abstract

The utility model discloses a bone density grayscale value calibration module, which is characterized in that it comprises an aluminum ladder and a rubber ladder, wherein the aluminum ladder is arranged below the rubber ladder, the aluminum ladder is composed of a plurality of Al step portions with different heights, and the rubber ladder is composed of a plurality of PMMA step portions with different heights, and the length direction of the PMMA step portion is perpendicular to the length direction of the Al step portion.

Description

Technical Field

[0001] The utility model belongs to the technical field of grayscale value calibration, and relates to a bone density grayscale value calibration module. Background Art

[0002] Each bone densitometer is individual and requires system calibration: calibrating the grayscale values ​​of different specifications of Al sheets / PMMA molds and different specifications of Al sheets and PMMA mold combinations; the grayscale value is the image obtained after the X-rays fall on the detector after imaging processing when the X-rays pass through different tissues of the human body (soft tissue, bone tissue), depending on the degree of X-ray absorption. Due to the different colors and brightness of each point in the image, each point on the image presents different degrees of gray (grayscale).

[0003] When calibrating the grayscale value of the bone densitometer image, calibration is required; there are 10 types of Al sheet thicknesses of different specifications (simulating bone tissue): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 mm; there are 8 types of PMMA thicknesses of different specifications (simulating soft tissue): 0, 18, 24, 30, 36, 42, 48, 54 mm, different Al sheet and PMMA mold combinations (simulating the grayscale of bone tissue under different soft tissues), a single machine needs to take 10*8=80 images (different Al sheet / PMMA separate and combined images); that is, it is time-consuming and labor-intensive to take Al sheet, PMMA mold and combination shots separately, a total of 80 shots are required, and the position needs to be re-positioned after each shot, and the registration takes about 2 minutes. It takes 2*80=160 minutes to complete the calibration. Therefore, it is necessary to design a bone density grayscale value calibration module to solve the above problems. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and proposes a bone density grayscale value calibration module.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a bone density grayscale value calibration module, characterized in that it includes an aluminum ladder and a rubber ladder, the aluminum ladder is arranged below the rubber ladder, the aluminum ladder is composed of a plurality of Al step portions of unequal heights, the rubber ladder is composed of a plurality of PMMA step portions of unequal heights, and the length direction of the PMMA step portion is perpendicular to the length direction of the Al step portion.

[0006] The height of the Al step portion is 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm; the height of the PMMA step portion is 0mm, 18mm, 24mm, 30mm, 36mm, 42mm, 48mm, and 54mm.

[0007] The utility model also comprises a frame, and the aluminum ladder and the rubber ladder are both connected to the frame.

[0008] The aluminum ladder and the rubber ladder are both connected to the frame through positioning pin one.

[0009] A second positioning pin is also provided between the aluminum ladder and the rubber ladder.

[0010] The frame also has a first digital identification part and a second digital identification part.

[0011] The aluminum ladder has an anti-reverse notch, the frame has an anti-reverse convex portion matched with the anti-reverse notch, the rubber ladder has an anti-reverse convex portion, and the frame has an anti-reverse notch matched with the anti-reverse convex portion.

[0012] Compared with the prior art, the bone density grayscale value calibration module has the following advantages:

[0013] The utility model combines the Al sheet and the PMMA mold together in a tower form, and can obtain multiple groups of images with different grayscale values ​​in one shooting, namely, separate and combined images of different Al sheets / PMMA, which effectively saves replacement and shooting time and greatly improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is an explosion schematic diagram of the utility model.

[0016] Figure 3 It is an image captured once in the present invention.

[0017] In the figure, 1, rubber ladder; 1a, PMMA step portion; 1b, anti-reflection convex portion 2; 2, aluminum ladder; 2a, Al step portion; 2b, anti-reflection notch 1; 3, frame; 3a, digital identification portion 1; 3b, digital identification portion 2; 3x, anti-reflection convex portion 1; 3y, anti-reflection notch 2; 4, positioning pin 1; 5, positioning pin 2. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1-Figure 2 As shown, the bone density grayscale value calibration module includes an aluminum ladder 2 and a rubber ladder 1. The aluminum ladder 2 is arranged below the rubber ladder 1. The aluminum ladder 2 is composed of a number of Al step portions 2a with different heights. The rubber ladder 1 is composed of a number of PMMA step portions 1a with different heights, and the length direction of the PMMA step portion 1a is perpendicular to the length direction of the Al step portion 2a.

[0020] The height of the Al step portion 2a is 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm; the height of the PMMA step portion 1a is 0mm, 18mm, 24mm, 30mm, 36mm, 42mm, 48mm, and 54mm.

[0021] In this embodiment, the heights of the Al step portion 2a from one side to the other are 1mm, 3mm, 5mm, 7mm, 9mm, 8mm, 6mm, 4mm, 2mm, and 0mm respectively; the heights of the PMMA step portion 1a from one side to the other are 0mm, 24mm, 36mm, 48mm, 54mm, 42mm, 30mm, and 18mm respectively; wherein the step portion height of 0 means that there is no thickness at that location. Of course, in practice, the number, value, and position of these heights can be adjusted as needed.

[0022] It also includes a frame 3, and the aluminum ladder 2 and the rubber ladder 1 are both connected to the frame 3; specifically: the aluminum ladder 2 and the rubber ladder 1 are both connected to the frame 3 through a positioning pin 1 4, and there is also a positioning pin 2 5 between the aluminum ladder 2 and the rubber ladder 1. Of course, in practice, other existing connection methods can also be used to achieve the connection between the frame 3, the aluminum ladder 2 and the rubber ladder 1.

[0023] The frame 3 also has a digital identification part 1 3a and a digital identification part 2 3b, which correspond to the heights of the upper surface.

[0024] The aluminum ladder 2 has an anti-reverse notch 2b, the frame 3 has an anti-reverse convex portion 3x matching the anti-reverse notch 2b, the rubber ladder 1 has an anti-reverse convex portion 1b, and the frame 3 has an anti-reverse notch 3y matching the anti-reverse convex portion 1b; this structure can prevent the aluminum ladder 2 and the rubber ladder 1 from being installed incorrectly. Of course, in practice, other existing structures can also be used to prevent them from being installed incorrectly or reversely.

[0025] That is, grayscale images of Al sheets / PMMA molds of different specifications and combinations of Al sheets and PMMA of different specifications can be obtained by one shot, which is simple to operate, time-saving and labor-saving; the specific images after one shot are as follows: Figure 3 shown.

[0026] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bone density grayscale value calibration module, characterized in that: The invention comprises an aluminum ladder (2) and a rubber ladder (1), wherein the aluminum ladder (2) is arranged below the rubber ladder (1), the aluminum ladder (2) is composed of a plurality of Al step portions (2a) of different heights, and the rubber ladder (1) is composed of a plurality of PMMA step portions (1a) of different heights, and the length direction of the PMMA step portion (1a) is perpendicular to the length direction of the Al step portion (2a).

2. A bone density grayscale value calibration module according to claim 1, characterized in that: The height of the Al step portion (2a) is 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm; the height of the PMMA step portion (1a) is 0mm, 18mm, 24mm, 30mm, 36mm, 42mm, 48mm, and 54mm.

3. A bone density grayscale value calibration module according to claim 1, characterized in that: It also includes a frame (3), and the aluminum ladder (2) and the rubber ladder (1) are both connected to the frame (3).

4. A bone density grayscale value calibration module according to claim 3, characterized in that: The aluminum ladder (2) and the rubber ladder (1) are both connected to the frame (3) via a positioning pin 1 (4).

5. A bone density grayscale value calibration module according to claim 3, characterized in that: A second positioning pin (5) is also provided between the aluminum ladder (2) and the rubber ladder (1).

6. A bone density grayscale value calibration module according to claim 3, characterized in that: The frame (3) also has a digital identification portion 1 (3a) and a digital identification portion 2 (3b).

7. A bone density grayscale value calibration module according to claim 6, characterized in that: The aluminum ladder (2) has an anti-reverse notch (2b), the frame (3) has an anti-reverse convex portion (3x) matching the anti-reverse notch (2b), the rubber ladder (1) has an anti-reverse convex portion (1b), and the frame (3) has an anti-reverse notch (3y) matching the anti-reverse convex portion (1b).

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