Radiomics characteristic repeatability verification die body

Abstract

The utility model relates to the technical field of electron density motifs, in particular to a radiomics characteristic repeatability verification motifs. According to the technical scheme, the device comprises an equivalent material base for 3D printing, wherein an insertion channel I and an insertion channel II are formed in one side of the equivalent material base for 3D printing; a test tube insertion rod is placed in the insertion channel I, and an equivalent tissue density rod is placed in the insertion channel II; and a laser lamp groove is formed in the vertical direction. According to the utility model, radiomics characteristics of a region of interest can be effectively extracted and analyzed by virtue of contrast differences of liquids with different equivalent densities in the insertion rod and a base material under CT scanning, the cost is low, the design is light and convenient, the structure is compact, the application is wide, and multi-center imaging contrast and single-center repeated scanning can be assisted; the device can also be used for CT imaging quality control and radiotherapy electron density calibration, and a practical and efficient tool is provided for related fields.

Description

Technical Field

[0001] This utility model relates to the field of electron density phantom technology, and in particular to a radiomics feature repeatability verification phantom. Background Technology

[0002] Since Lambin introduced the concept of radiomics in 2012, radiomics methods have gradually matured with the development of medical imaging data and sophisticated image analysis tools, providing effective decision-making tools for personalized treatment plans in modern medicine. Feature engineering is a crucial step in radiomics; feature repeatability and stability determine the generalization and robustness of the model. Merging data in multicenter radiomics studies can potentially improve statistical power and more accurately represent a broader patient population. However, using different scanner manufacturers, image reconstruction algorithms, and acquisition schemes can increase unwanted variability in the data. Radiomics features are often sensitive to CT image reconstruction techniques and acquisition parameters (such as tube current, tube voltage, and noise figure), which can cause feature variations and thus interfere with the results of radiomics analysis.

[0003] Before merging multicenter images for analysis, the consistency of radiomics features should be verified. A set of multicenter model CT scan images is publicly available, but according to research, no standard phantom has been found for benchmark testing. Conversely, the use of standardized image scanning protocols in clinical trials assumes feature consistency, but this is not feasible for retrospective studies, and it cannot be guaranteed even when using different scanning machines. Therefore, this application proposes a radiomics feature reproducibility verification phantom. Utility Model Content

[0004] The purpose of this invention is to address the problem in the background art where, before merging multi-center images for analysis, a set of multi-center model CT scan images is publicly available, and no standard phantom is used for benchmark testing. This invention proposes a radiomics feature repeatability verification phantom.

[0005] The technical solution of this utility model is: a radiomics feature repeatability verification phantom, including a 3D printed equivalent material base, wherein one side of the 3D printed equivalent material base is provided with an insertion channel one and an insertion channel two.

[0006] A test tube inserter is placed in the first insertion channel, and an equivalent tissue density bar is placed in the second insertion channel.

[0007] Laser lamp recesses are set on the surface of the 3D-printed equivalent material base.

[0008] Optionally, the laser lamp recess assembly includes:

[0009] A vertical laser lamp groove is arranged on the surface of the 3D-printed equivalent material base.

[0010] A GT direction laser lamp groove is arranged on the 3D-printed equivalent material base and is perpendicular to the vertical laser lamp groove.

[0011] An AB direction laser lamp groove is arranged on the 3D-printed equivalent material base and is perpendicular to the vertical laser lamp groove and the GT direction laser lamp groove.

[0012] Optionally, the 3D-printed equivalent material base is in the shape of a cube, the vertical laser lamp groove is arranged along a vertical edge of the 3D-printed equivalent material base, the GT direction laser lamp groove is arranged along a horizontal edge of the 3D-printed equivalent material base, and the AB direction laser lamp groove is arranged along another horizontal edge of the 3D-printed equivalent material base, and the three edges are perpendicular to each other.

[0013] Optionally, the vertical laser lamp groove, the GT direction laser lamp groove and the AB direction laser lamp groove intersect at an isocenter point, and the isocenter point is located at the center of one side surface of the 3D-printed equivalent material base.

[0014] Optionally, the 3D-printed equivalent material base is made of a foam material with a density of 0.24 g / cm 3 .

[0015] Optionally, the inner diameters of the insertion channel one and the insertion channel two are greater than the cross-sectional diameters of the equivalent tissue density rod and the test tube insertion rod.

[0016] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0017] The different contrast formed by the different equivalent density liquids in the insertion rod and the base material under CT scanning can extract and analyze the radiomics features of different regions of interest, and provide accurate data support and analysis basis for related fields such as radiotherapy.

[0018] Meanwhile, the present application has the advantages of low cost, light design, and overall weight not exceeding 50 g, and is convenient to carry and use and will not cause excessive burden in multiple scene applications.

[0019] The present application can be used for multi-center imaging contrast, which is helpful for data exchange and cooperation between different medical institutions; can also be used for single-center repeated scanning to ensure the reliability and consistency of data in the same institution; can also be used for CT imaging quality control to ensure the stability of the imaging quality of the CT equipment; and can also be used for radiotherapy electron density calibration to improve the accuracy and safety of radiotherapy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a radiomics feature repeatability verification phantom;

[0021] Figure 2 Schematic diagram of the equivalent tissue density bar installation structure;

[0022] Figure 3 A schematic diagram of the structure for installing the test tube insertion rod.

[0023] Reference numerals: 1. 3D printed equivalent material base; 2. Insertion channel one; 3. Insertion channel two; 4. Isocentric position point; 5. Vertical laser lamp groove; 6. GT direction laser lamp groove; 7. AB direction laser lamp groove; 8. Equivalent tissue density bar; 9. Test tube insertion bar. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Example

[0028] like Figure 1 As shown, the present invention proposes a radiomics characterization repeatability verification phantom, comprising a 3D-printed equivalent material base 1, wherein the 3D-printed equivalent material base 1 has a material content of 0.24 g / cm³. 3 Foam material. For example... Figures 1 to 3 As shown, an insertion channel 1 (2) and an insertion channel 2 (3) are provided on one side of the 3D-printed equivalent material base 1. A test tube insertion rod 9 is placed in insertion channel 1, and an equivalent tissue density rod 8 is placed in insertion channel 2. The test tube insertion rod 9 can be filled with liquid or various equivalent density materials different from the base material, used for CT value comparison and grayscale calibration of the simulated positioning machine scan image. The inner diameters of insertion channels 1 and 2 are both larger than the cross-sectional diameters of the equivalent tissue density rod 8 and the test tube insertion rod 9. The equivalent tissue density rod 8 and the test tube insertion rod 9 can be placed in insertion channel 1 or insertion channel 2.

[0029] Wherein, the 3D printed equivalent material base 1 is provided with a vertical direction laser lamp groove 5, a GT direction laser lamp groove 6, which is arranged on the 3D printed equivalent material base 1 and is perpendicular to the vertical direction laser lamp groove 5; an AB direction laser lamp groove 7, which is arranged on the 3D printed equivalent material base 1 and is perpendicular to the vertical direction laser lamp groove 5 and the GT direction laser lamp groove 6; wherein, the vertical direction laser lamp groove 5, the GT direction laser lamp groove 6 and the AB direction laser lamp groove 7 intersect at an isocenter point 4, which is located at the center of one side surface of the 3D printed equivalent material base 1; the vertical direction laser lamp groove 5, the GT direction laser lamp groove 6 and the AB direction laser lamp groove 7 can be used for medical accelerator and simulation positioning CT laser lamp calibration.

[0030] Wherein, the 3D printed equivalent material base 1 is in the shape of a cube, the vertical direction laser lamp groove 5 is arranged along a vertical edge of the 3D printed equivalent material base 1, the GT direction laser lamp groove 6 is arranged along a horizontal edge of the 3D printed equivalent material base 1, and the AB direction laser lamp groove 7 is arranged along another horizontal edge of the 3D printed equivalent material base 1, and the three edges are perpendicular to each other.

[0031] The working principle of the embodiment is as follows: when in use, the test tube is inserted into the rod 9, the test tube is taken out, the level test is first performed on the scanning bed to ensure that the bed surface is level, the equivalent material base 1 is placed at the isocenter of the CT positioning machine or the laser lamp of the linear accelerator, the vertical direction laser lamp groove 5, the GT direction laser lamp groove 6 and the AB direction laser lamp groove 7 are aligned, and the laser lamp is calibrated with the laser groove as a reference to ensure the positional accuracy of the laser lamp in the three-dimensional space.

[0032] The test tube insertion rod 9 is placed in the insertion channel one 2, and the insertion channel one 2 and the insertion channel two 3 can respectively insert different equivalent density rods. The 3D printed equivalent material base 1 of the inserted test tube insertion rod 9 or the equivalent material is subjected to CT thin layer scanning, different gray value regions in the scanning image are outlined, and radiomics features are extracted. Similarly, the CT values of the simulation positioning image can be subjected to tissue density calibration, which is used for dose calculation of radiotherapy planning. Through the different contrasts of different equivalent density liquids in the insertion rod and the base material under CT scanning, radiomics features of different regions of interest can be extracted and analyzed, thereby providing accurate data support and analysis basis for related fields such as radiotherapy.

[0033] The whole weight of the embodiment is not more than 50g, and the embodiment is convenient to carry and use and does not cause an excessive burden in multiple scene applications. The embodiment can be used for multi-center imaging contrast, helps data exchange and cooperation between different medical institutions, can be used for single-center repeated scanning, guarantees the reliability and consistency of data in the same institution, can be used for CT imaging quality control, ensures the stability of CT equipment imaging quality, and can be used for radiotherapy electronic density calibration, and improves the accuracy and safety of radiotherapy.

[0034] The above specific embodiments are only several optional embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A radiomics feature repeatability validation phantom, characterized in that, Comprising: 3D printed equivalent material base (1), one side of which is provided with insertion channel one (2) and insertion channel two (3); The test tube insertion rod (9) is placed in the insertion channel one (2), and the equivalent tissue density rod (8) is placed in the insertion channel two (3); The laser lamp groove group is arranged on the surface of the 3D printed equivalent material base (1).

2. The radiomic feature reproducibility phantom of claim 1, wherein, The laser lamp groove group comprises: The vertical direction laser lamp groove (5) is arranged on the surface of the 3D printed equivalent material base (1); The GT direction laser lamp groove (6) is arranged on the 3D printed equivalent material base (1) and perpendicular to the vertical direction laser lamp groove (5); The AB direction laser lamp groove (7) is arranged on the 3D printed equivalent material base (1) and perpendicular to the vertical direction laser lamp groove (5) and the GT direction laser lamp groove (6).

3. Radiomic feature reproducibility verification phantom according to claim 2, characterized in that The shape of the 3D printed equivalent material base (1) is a cube, the vertical direction laser lamp groove (5) is arranged along one vertical edge of the 3D printed equivalent material base (1), the GT direction laser lamp groove (6) is arranged along one horizontal edge of the 3D printed equivalent material base (1), and the AB direction laser lamp groove (7) is arranged along the other horizontal edge of the 3D printed equivalent material base (1), and the three edges are perpendicular to each other.

4. The radiomic feature reproducibility phantom of claim 3, wherein, The vertical direction laser lamp groove (5), the GT direction laser lamp groove (6) and the AB direction laser lamp groove (7) intersect at the isocenter position point (4), and the isocenter position point (4) is located at the center of one side surface of the 3D printed equivalent material base (1).

5. The radiomic feature reproducibility phantom of claim 1, wherein, The 3D printed equivalent material base (1) is a foam material of 0.24 g / cm 3 .

6. The radiomic feature reproducibility phantom of claim 1, wherein, The inner diameters of the insertion channel one (2) and the insertion channel two (3) are greater than the cross-sectional diameters of the equivalent tissue density rod (8) and the test tube insertion rod (9).

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