Phantom and fat quantitative detection system

Abstract

The utility model provides a phantom and a fat quantitative detection system, and relates to the technical field of medical equipment. The phantom comprises a base and a calibration fat piece, the base has a preset direction, and the base is equivalent to water in an MRI image; the calibration fat pieces are connected with the base, the multiple calibration fat pieces are arranged in the preset direction at intervals, and the multiple calibration fat pieces have multiple fat percentage values. According to the invention, an accuracy comparison standard of PDFF measurement can be provided, and comparison and conversion of measurement results between different patients and the phantom are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a phantom and a fat quantification system. BACKGROUND

[0002] Generally, the proton density fat fraction (PDFF) measured by the chemical shift encoded magnetic resonance imaging (CSE-MRI) technology is a currently recognized imaging marker that can accurately quantify the fat content of human tissues, and can realize quantitative measurement of the total fat content including the intracellular fat content. However, there is no relevant professional phantom quality control and comparison verification for the stability and accuracy of the fat content measured by the PDFF image. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the purpose of the present application is to overcome the deficiencies in the prior art, and to provide a phantom and a fat quantification system, which can provide an accuracy comparison standard for PDFF measurement, and facilitate comparison and conversion of measurement results between different patients and phantoms.

[0004] The present application provides the following technical solutions:

[0005] In a first aspect, the present application provides a phantom, which comprises:

[0006] a base, the base having a preset direction, and the base being water equivalent in an MRI image;

[0007] a calibration fat piece, the calibration fat piece being connected to the base, and the number of the calibration fat pieces being multiple, the multiple calibration fat pieces being arranged at intervals in the preset direction, and the multiple calibration fat pieces having multiple fat percentage values.

[0008] In some embodiments of the first aspect, the multiple calibration fat pieces are divided into a first-level calibration fat piece, a second-level calibration fat piece, a third-level calibration fat piece, and a fourth-level calibration fat piece according to the fat percentage values; the fat percentage value of the first-level calibration fat piece is 100%, the fat percentage value of the second-level calibration fat piece is 70%, the fat percentage value of the third-level calibration fat piece is 30%, and the fat percentage value of the fourth-level calibration fat piece is 0%.

[0009] In some embodiments of the first aspect, the base is arranged to extend along the preset direction.

[0010] In some embodiments of the first aspect, the preset direction is arranged to be arc-shaped.

[0011] In some embodiments of the first aspect, the base is provided with an elastic structure or a flexible structure.

[0012] In some embodiments of the first aspect, the calibration fat piece and the base are detachably connected.

[0013] In some embodiments of the first aspect, the base has a plurality of insertion holes, and the insertion holes are formed with orifices at least on one end surface of the base, and the calibration fat piece is arranged in the corresponding insertion hole.

[0014] In some embodiments of the first aspect, the insertion hole and the calibration fat piece are transitionally fitted or interference fitted.

[0015] In some embodiments of the first aspect, the base has a length direction, a width direction and a thickness direction.

[0016] In some embodiments of the first aspect, the length of the base is L, the width of the base is W, and the thickness of the base is H, and the following conditions are met: 80mm≤L≤120mm, 70mm≤L≤90mm, 15mm≤L≤25mm.

[0017] In a second aspect, the present application further provides a fat quantification system, which comprises the phantom as described in any one of the above embodiments.

[0018] The embodiments of the present application have the following advantages:

[0019] The present application provides a phantom. The phantom with the calibration fat piece is placed on the MRI scanning bed, usually under the part of the patient's body to be scanned, so that the data of the patient and the phantom can be obtained at the same time in the same scanning sequence. MRI scanning is performed to ensure that the region where the calibration fat piece in the phantom is located and the target patient region are included. An appropriate PDFF sequence is used to obtain images. On the obtained PDFF images, the target region position of the patient and the position of the calibration fat piece in the phantom are respectively outlined. The MRI scanning bed automatically generates the fat content percentage of the target region position and the calibration fat piece. The measured fat content percentage of the patient is compared with the fat percentage of the calibration fat piece in the phantom. This step can help verify the accuracy of the measurement and adjust the values in the final report.

[0020] That is, a standard reference point with a known fat percentage is provided by using the calibration fat piece, so as to be compared with the imaging data of the patient, so as to more accurately quantify the fat content of a specific region in the patient's body.

[0021] The application also relates to a fat quantification system, and the fat quantification system comprising the phantom has the same technical effects, and details are not repeated here.

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken as examples, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 Fig. 1 shows a perspective view of a phantom according to an embodiment of the application;

[0025] Figure 2 Fig. 2 shows a perspective view of a phantom according to another embodiment of the application.

[0026] Explanation of main element symbols:

[0027] 100 - base; 110 - jack; 200 - fat calibration piece; X - preset direction. DETAILED DESCRIPTION

[0028] The embodiments of the application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation to the application.

[0029] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. In contrast, when an element is referred to as being "directly on" another element, there is no intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0030] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connection", "fixed", and the like should be construed broadly and do not necessarily imply that two elements are directly connected to each other. It will be apparent to those skilled in the art that many terms and / or specific techniques can be used and / or will become available in the future without departing from the scope of the present application.

[0031] In addition, the terms "first", "second", "third", etc. are used herein only to describe various conditions, and should not be construed to indicate or imply relative importance or a number of the indicated technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the template herein is only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0033] In the related art, the proton density fat fraction (PDFF) measured by the chemical shift encoded magnetic resonance imaging (CSE-MRI) technology is a recognized image marker that can accurately quantify the fat content of human tissue, and can realize quantitative measurement of total fat content including intracellular fat content. However, there is no relevant professional phantom quality control and comparison verification for the stability and accuracy of the fat content measured by the PDFF image.

[0034] As shown in Figure 1 To solve the above technical problems, the present application provides a phantom, which includes a base 100 and a calibration fat piece 200. The base 100 has a preset direction X, and the base 100 is water equivalent in an MRI image. The calibration fat piece 200 is connected to the base 100, and the number of the calibration fat piece 200 is multiple. The multiple calibration fat pieces 200 are arranged at intervals in the preset direction X, and the multiple calibration fat pieces 200 have multiple fat percentage values.

[0035] In these embodiments, the technical solution of the present application aims to improve the accuracy and consistency of PDFF measurement by providing a phantom. The design of such a phantom is crucial to ensure the consistency of the CSE-MRI technique under different conditions (such as different equipment, operators or patients), thereby providing a reliable reference standard for fat content quantification.

[0036] It is an important choice to select the material of the base 100 to be equivalent to water in the MRI image, because water is one of the most common components in the human body, and its signal characteristics are relatively stable, which helps to focus on the changes of fat components, rather than any potential changes caused by the base material. For example, the phantom is placed beside the body to be scanned (abdominal wall, waist and back, hip, thigh, etc.) and scanned together with the subject site, such as when the subject site is the thigh, the phantom is placed under the thigh.

[0037] For example, the base 100 uses a tissue-equivalent resin material that is specially designed to mimic the magnetic resonance characteristics of human soft tissue. The main components of the tissue-equivalent resin material are composed of a specific proportion of resin and other additives, which ensure that the physical and chemical properties of the material are similar to water. Obviously, the material of the base 100 can effectively simulate the performance of water in MRI, providing an accurate and stable reference benchmark for calibration, quantitative measurement and research.

[0038] The use of calibration fat pieces 200 with a variety of known fat percentage values allows the performance of the imaging system to be calibrated, and can be used to verify whether the obtained PDFF values accurately reflect the actual fat content. These calibration fat pieces 200 should cover a wide range of fat percentage ranges to ensure that all cases from very low to very high fat content can be represented.

[0039] For example, these calibration fat pieces 200 are used to form a plurality of fat percentage intervals, such as fat percentage 0-30%, fat percentage 20-30%, fat percentage 30-70%, fat percentage 70-100%, etc. The above settings can accurately determine which interval the fat percentage of the detection object is in.

[0040] It should be noted that the plurality of calibration fat pieces 200 used in the phantom have different fat percentage values. These fat pieces are designed to contain a specific proportion of fat and water mixture to simulate tissues with different fat content in the human body. Each calibration fat piece 200 represents a known and precisely controlled fat percentage, such as 10%, 20%, 30%, and 40%, etc. By using these calibration fat pieces 200 with different fat percentages, a series of reference points can be provided during magnetic resonance imaging (MRI) to calibrate and verify the accuracy of proton density fat fraction (PDFF) measurements of the human detection part. Specifically, each calibration fat piece 200 is strictly quality controlled to ensure that the proportion of fat and water inside it is stable and consistent. These fat pieces are usually placed in fixed positions in the phantom and are imaged simultaneously with the patient during MRI scanning. In this way, by measuring the PDFF of these known fat percentage fat pieces and comparing their results with the actual set values, the measurement accuracy of the entire system can be evaluated and corrected. This multi-level fat percentage setting not only helps to improve the reliability of a single measurement, but also covers a wider range of fat content, better adapting to the actual situation of different patients.

[0041] The interval arrangement of the plurality of calibration fat pieces 200 along the preset direction X can help evaluate the uniformity and accuracy within the entire imaging area, that is, the plurality of calibration fat pieces 200 are dispersedly arranged to avoid interference between each other.

[0042] Obviously, the phantom with calibration fat pieces 200 is placed on the MRI scanning bed, usually under the part of the patient's body to be scanned, so that the data of the patient and the phantom can be obtained simultaneously in the same scanning sequence. The MRI scan is performed to ensure that the area where the calibration fat pieces 200 in the phantom are located and the target patient area are included. An appropriate PDFF sequence is used to obtain the image. On the obtained PDFF image, the target area position of the patient and the position of the calibration fat pieces 200 in the phantom are respectively outlined or selected. The MRI scanning bed automatically generates the target area position and the fat content percentage of the calibration fat pieces 200. The measured fat content percentage of the patient is compared with the fat percentage of the calibration fat pieces 200 in the phantom. This step can help verify the accuracy of the measurement and adjust the values in the final report.

[0043] That is, a standard reference point of known fat percentage is provided by the calibration fat pieces 200 for comparison with the imaging data of the patient, so as to more accurately quantify the fat content of a specific area in the patient's body.

[0044] The present application provides an effective way to improve the accuracy of CSE-MRI technology applied in the field of fat quantification.

[0045] In some embodiments, the plurality of calibration fat pieces 200 are classified into four levels according to the percentage of fat: first level calibration fat piece 200, second level calibration fat piece 200, third level calibration fat piece 200 and fourth level calibration fat piece 200; wherein the first level calibration fat piece 200 has a fat percentage of 100%, the second level calibration fat piece 200 has a fat percentage of 70%, the third level calibration fat piece 200 has a fat percentage of 30%, and the fourth level calibration fat piece 200 has a fat percentage of 0%.

[0046] In these embodiments, when using a phantom for PDFF (proton density fat fraction) measurement, the presence of calibration fat pieces with different fat percentages can help verify and calibrate the accuracy of the MRI system. In this embodiment, there are four levels of calibration fat pieces 200, each with a specific fat percentage, namely: first level calibration fat piece 200: 100% fat, second level calibration fat piece 200: 70% fat, third level calibration fat piece 200: 30% fat, fourth level calibration fat piece 200: 0% fat (pure water or similar substance). The design purpose of these calibration fat pieces 200 is to provide a series of standards with known fat content for comparison with the actual patient's PDFF value.

[0047] In the patient preparation stage, ensure that the phantom is correctly placed and contains the four levels of calibration fat pieces 200 described above. Perform MRI scanning to obtain image data including the patient's target area and all calibration fat pieces 200. For each calibration fat piece 200 and the patient's target area, accurately outline the ROI on the PDFF map. Ensure that the position and size of the ROI are moderate to obtain accurate average PDFF values. Use software to automatically calculate the average PDFF value within each ROI. Record the actual measured PDFF values of each level of calibration fat piece 200. Compare the measured PDFF values of each level of calibration fat piece 200 with their preset standard values (i.e. 100%, 70%, 30%, 0%). Evaluate the deviation, if there is a large difference, it may be necessary to adjust the scanning parameters or recalibrate the equipment. Use the data of the calibration fat pieces 200 as a reference to verify whether the PDFF measurement of the patient's target area is accurate. According to the final confirmed data, generate a detailed report including the patient's PDFF value and its comparison result relative to the standard phantom.

[0048] It should be noted that the presence of calibration fat pieces 200 of different levels provides a wide range of fat proportions, which helps to test and correct the system performance more comprehensively.

[0049] Of course, as Figure 2In other embodiments, the number of calibration fat pieces 200 is three, and the three calibration fat pieces 200 are classified as first-level calibration fat pieces 200, second-level calibration fat pieces 200, and third-level calibration fat pieces 200; or second-level calibration fat pieces 200, third-level calibration fat pieces 200, and fourth-level calibration fat pieces 200.

[0050] As a further option, the number of calibration fat pieces 200 is two, and the two calibration fat pieces 200 are classified as first-level calibration fat pieces 200 and second-level calibration fat pieces 200; or second-level calibration fat pieces 200 and third-level calibration fat pieces 200; or third-level calibration fat pieces 200 and fourth-level calibration fat pieces 200.

[0051] As shown in some embodiments, the base 100 is designed to extend along a predetermined direction X. Figure 1

[0052] In these embodiments, the base 100 is designed to extend along a predetermined direction X, which generally means that the base 100 is designed as a long strip or flat plate structure, so as to be able to be placed along a specific direction (e.g. length direction). By extending along the predetermined direction X, the base 100 can better adapt to different parts of the human body, such as the abdomen, waist, hips, and thighs, etc. This design allows the phantom to better conform to the natural curves of the body, thereby improving the consistency and accuracy of the measurements.

[0053] The longer base 100 helps to provide better stability, especially in situations where the patient needs to remain still during scanning. A stable base 100 can help reduce artifacts caused by movement, resulting in clearer images. The design of the predetermined direction X makes it easier to accurately position the phantom before scanning, ensuring that the calibration fat pieces 200 are in the optimal position for analysis. Especially for repeated measurements or measurements of different patients, a consistent base 100 design helps to ensure that the measurement conditions are the same each time, thereby improving the comparability between data.

[0054] For example, to detect the abdomen of the human body, the base 100 is designed as a flat rectangular plate with a moderate width sufficient to cover the entire abdominal area; the length is set according to the needs, which may be the length from the lower edge of the rib to the upper edge of the iliac crest.

[0055] The material of the base 100 should be selected as a substance that appears equivalent to water in MRI images, such as polyvinyl alcohol gel or other similar transparent or translucent materials.

[0056] A plurality of calibration fat pieces 200 are arranged along the length direction of the base 100 at predetermined intervals. Each calibration fat piece 200 is fixed on the base 100, and their positions should be clearly marked for subsequent ROI delineation.​

[0057] Optionally, to improve patient comfort, the edges of the base 100 can be designed with a rounded chamfer, and the surface can be treated with some anti-slip treatment to ensure that it does not slip during scanning.

[0058] When used for abdominal PDFF measurement, the phantom is placed under the patient's abdomen, ensuring that it fits closely to the skin. Perform CSE-MRI scanning to obtain images containing the patient's abdomen and the phantom. On the magnetic resonance substation, draw ROIs on the target area of the patient and the four calibration fat pieces 200 on the phantom, respectively. The analysis software automatically generates the PDFF value of each ROI. By comparing the PDFF value of the patient's target area with the calibration value of the known fat percentage on the phantom, the measurement result is verified and corrected. The phantom designed in this way not only provides an accurate and reliable reference standard, but also takes into account the convenience and comfort in actual use.

[0059] As shown in FIG. 1, in some embodiments, the preset direction X is set to be arc-shaped. Figure 1

[0060] In these embodiments, the base 100 is arc-shaped along the preset direction X. This design can better adapt to the natural curves of the human body, especially in non-flat areas such as the abdomen and waist. The arc-shaped design helps to improve the fit of the phantom to the patient's body, ensuring more accurate and consistent PDFF measurement. That is, the base 100 is arc-shaped as a whole, and its curvature can be optimized according to common human body parts (such as the abdomen and waist). The radius and length of the arc can be adjusted according to different application requirements to adapt to patients of different body types.

[0061] The plurality of calibration fat pieces 200 are arranged along the arc-shaped base 100 at predetermined intervals. The calibration fat pieces 200 should be firmly embedded or fixed on the base 100 to ensure that they do not move during scanning. The position of each calibration fat piece 200 should be clearly marked to facilitate subsequent ROI drawing.

[0062] Optionally, the edges are designed with a rounded chamfer to improve patient comfort and reduce potential discomfort.

[0063] In some embodiments, the base 100 is provided with an elastic or flexible structure.

[0064] In these embodiments, the base 100 is provided with an elastic or flexible structure, which can further improve the fit and comfort of the phantom to the human body. This design not only adapts to patients of different body types, but also ensures that the phantom is in close contact with the skin during scanning, thereby improving the accuracy and consistency of the measurement.

[0065] ​The base 100 is made of a material that is elastic and flexible, such as silicone, polyurethane foam, or other medical-grade soft material. The material needs to be water-equivalent in MRI images, while also having good biocompatibility and chemical stability.

[0066] The base 100 is made of an elastic or flexible material, which can be appropriately bent and deformed according to the size of the patient. The elastic material should have sufficient resilience to maintain its shape and provide stable support.

[0067] As shown in FIG. 1, in some embodiments, the calibration fat piece 200 and the base 100 are detachably connected. Figure 1

[0068] In these embodiments, the calibration fat piece 200 and the base 100 are designed for detachable connection, which can provide greater flexibility and maintenance convenience. This design allows specific calibration fat pieces 200 to be replaced or calibrated when needed, and also facilitates the cleaning and storage of the phantom.

[0069] For example, the calibration fat piece 200 and the base 100 are connected by a snap-on connection, and the calibration fat piece 200 can be connected or separated from the base 100 by a simple pressing and pulling action.

[0070] Of course, in other embodiments, the calibration fat piece 200 and the base 100 are connected by a slot connection, and the base 100 is provided with a recess or slot, and the bottom of the calibration fat piece 200 is designed as a corresponding protrusion, and the connection and separation are achieved by insertion and pulling out.

[0071] Alternatively, the calibration fat piece 200 and the base 100 are connected by a threaded connection, and matching threads are provided on the calibration fat piece 200 and the base 100, and the connection and separation are achieved by screwing and unscrewing.

[0072] As shown in FIG. 1, in some embodiments, the base 100 has a plurality of insertion holes 110, and the insertion holes 110 are formed with orifices at least on one end face of the base 100, and the calibration fat piece 200 is inserted into the corresponding insertion hole 110. Figure 1 In these embodiments, the base 100 is designed with a plurality of insertion holes 110, and the calibration fat piece 200 is inserted into the base 100 through these insertion holes 110. This design can provide a simple and effective way to fix the calibration fat piece 200, and is convenient for replacement and maintenance.

[0073]

[0074] ​​A plurality of receptacles 110 are provided on the base 100, each corresponding to a calibration fat piece 200. The positions of the receptacles 110 can be optimized according to actual needs, for example, uniformly distributed on the base 100. The receptacles 110 are formed with an aperture at least on one end face, allowing the calibration fat piece 200 to be inserted from the end face. The aperture can be designed in a circular, square or other suitable shape to match the shape of the calibration fat piece 200. The calibration fat piece 200 should be designed in a shape and size matching the receptacle 110 to ensure a tight fit and prevent movement during scanning. The calibration fat piece 200 is inserted into the receptacle 110 of the base 100 and can be fixed in place by a simple pressing action.

[0075] To increase stability, some locking mechanisms such as elastic clasps or inner walls with greater friction can be provided within the receptacle 110 to prevent the calibration fat piece 200 from falling off during scanning.

[0076] Obviously, the calibration fat piece 200 can be easily removed from the receptacle 110 for cleaning, disinfection or replacement, extending the service life of the entire phantom. If one of the calibration fat pieces 200 is damaged or aged, it can be replaced individually without replacing the entire phantom. Different calibration fat pieces 200 can be rearranged or adjusted in position as needed to adapt to different measurement requirements.

[0077] In some embodiments, the receptacle 110 and the calibration fat piece 200 are transitionally fitted or interference fitted.

[0078] In these embodiments, the transition fit or interference fit between the receptacle 110 and the calibration fat piece 200 can provide a more secure connection, ensuring that the calibration fat piece 200 does not move or fall off during scanning.

[0079] In some embodiments, the base 100 has a length direction, a width direction and a thickness direction; wherein the length of the base 100 is L, the width of the base 100 is W, and the thickness of the base 100 is H, satisfying: 80mm≤L≤120mm, 70mm≤L≤90mm, 15mm≤L≤25mm.

[0080] In these embodiments, the size of the base 100 is designed within a specific range to ensure that it is suitable for a variety of clinical application scenarios and can be easily placed on a specific body part of a patient.

[0081] Length: The length range of 80mm to 120mm can cover most abdominal, waist and other areas while maintaining sufficient flexibility for use on patients of different sizes.

[0082] Exemplarily, in the present embodiment, the length of the base 100 is 100 mm. Of course, in other embodiments, the length of the base 100 is 80 mm, 85 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, etc.

[0083] Width: A width range of 70 mm to 90 mm can ensure that the base 100 is wide enough to cover the target area, while not being too large to affect the comfort of the patient.

[0084] Exemplarily, in the present embodiment, the width of the base 100 is 80 mm. Of course, in other embodiments, the length of the base 100 is 70 mm, 75 mm, 85 mm, 90 mm, etc.

[0085] Thickness: A thickness range of 15 mm to 25 mm ensures the stability of the base 100, without being too thick to cause discomfort. A thinner base 100 can reduce the feeling of oppression on the patient, improving comfort. The appropriate width and length enable the base 100 to better fit the human body curve, reducing the possibility of movement and sliding. The base 100 within these size ranges is relatively small, facilitating portability and storage, and suitable for use in different medical environments.

[0086] Exemplarily, in the present embodiment, the thickness of the base 100 is 20 mm. Of course, in other embodiments, the length of the base 100 is 15 mm, 18 mm, 22 mm, 25 mm, etc.

[0087] In some embodiments, the present application also provides a fat quantification system, which comprises the phantom according to any one of the above embodiments.

[0088] Since the above-mentioned phantom has the above-mentioned technical effects, the fat quantification system comprising the phantom should have the same technical effects, which will not be described here again.

[0089] In all examples shown and described herein, any specific values should be interpreted as merely exemplary, and not as a limitation, and thus, other examples of the exemplary embodiments can have different values.

[0090] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0091] The above embodiments only express several implementation ways of the present application, and the description is more specific and detailed, but it should not be understood as a limitation to the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A phantom, characterized in that, The phantom includes: A base having a preset orientation, and the base appearing as water in MRI images; The calibration fat component is connected to the base, and there are multiple calibration fat components. The multiple calibration fat components are arranged at intervals in the preset direction, and the multiple calibration fat components have multiple fat percentage values.

2. The phantom according to claim 1, characterized in that, The multiple calibration fat components are classified into four levels according to their fat percentage: Level 1 calibration fat component, Level 2 calibration fat component, Level 3 calibration fat component, and Level 4 calibration fat component; wherein, the fat percentage of the Level 1 calibration fat component is 100%, the fat percentage of the Level 2 calibration fat component is 70%, the fat percentage of the Level 3 calibration fat component is 30%, and the fat percentage of the Level 4 calibration fat component is 0%.

3. The phantom according to claim 1, characterized in that, The base extends along the preset direction.

4. The phantom according to claim 3, characterized in that, The preset direction is set to an arc shape.

5. The phantom according to claim 4, characterized in that, The base is provided with an elastic or flexible structure.

6. The phantom according to claim 1, characterized in that, The calibration fat component and the base are detachably connected.

7. The phantom according to claim 6, characterized in that, The base has multiple insertion holes, and each insertion hole has an opening formed on at least one end face of the base. The calibration fat element passes through the corresponding insertion hole.

8. The phantom according to claim 7, characterized in that, The socket and the calibration fat component are either transitionally fitted or interference-fitted.

9. The phantom according to any one of claims 1 to 8, characterized in that, The base has a length direction, a width direction, and a thickness direction; The base has a length of L, a width of W, and a thickness of H, satisfying the following conditions: 80mm≤L≤120mm, 70mm≤L≤90mm, and 15mm≤L≤25mm.

10. A fat quantification detection system, characterized in that, The fat quantification detection system includes a phantom as described in any one of claims 1 to 9.

Images