Auxiliary positioning device of magnetic resonance imaging quality detection phantom

Abstract

The utility model provides an auxiliary positioning device of a magnetic resonance imaging quality detection phantom, which comprises a shell arranged on an ACR test body; the first gradienter is arranged on the shell and is used for detecting the levelness of the ACR test body in the axial direction after the ACR test body is put into the coil; the second gradienter is installed on the end face of the shell and used for detecting the levelness of the ACR test body in the circumferential direction after the ACR test body is placed into the coil; the scale assembly is installed on the end face of the shell and used for detecting the deviation between the central axis of the ACR test body and the central axis of the coil. By designing the auxiliary positioning device integrating the first gradienter, the second gradienter and the scale assembly, when the auxiliary positioning device is used for testing, the positioning accuracy of a test body can be improved, an operator can conveniently adjust the position of the test body, the time and energy for repeatedly adjusting the bubble gradienter can be saved, and the testing efficiency is improved. Meanwhile, due to the universal design, the shell can be suitable for ACR tests of different coils.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic resonance imaging, and in particular relates to an auxiliary positioning device for a magnetic resonance imaging quality detection phantom. Background Art

[0002] When installing or repairing an MR (Magnetic Resonance) scanner in a hospital, it must pass the ACR test, which requires acquiring a series of T1-weighted and T2-weighted images using a specific ACR (American College of Radiology) test body. Because the test body must be kept level and parallel to the patient table, positioning it is often time-consuming. Typically, the operator uses a bubble level and a positioning laser to accomplish this. However, due to concerns about patient safety, the use of lasers is gradually decreasing, making the operator's work more time-consuming and tedious. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an auxiliary positioning device for an MRI quality detection phantom, so as to improve the problem that the positioning process of the test body during ACR testing takes a lot of time and is relatively cumbersome.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides an auxiliary positioning device for a magnetic resonance imaging quality inspection phantom, comprising:

[0005] a housing mounted on the ACR test body;

[0006] a first level, mounted on the housing, for detecting the horizontality of the ACR test body in the axial direction after the test body is placed in the coil;

[0007] a second level, mounted on an end face of the housing, for detecting the levelness of the ACR test body in the circumferential direction after the test body is placed in the coil;

[0008] A scale assembly is mounted on the end surface of the housing and is used to detect the deviation between the central axis of the ACR test body and the central axis of the coil.

[0009] In one embodiment of the present invention, the first level is arranged along the axial direction of the ACR test body.

[0010] In one embodiment of the present invention, the second level is arranged along the radial direction of the ACR test body.

[0011] In one embodiment of the present invention, the section passing through the central axis of the first level and the ACR test body is a first plane, and the section passing through the central axis of the second level and the ACR test body is a second plane, and the first plane and the second plane are perpendicular to each other.

[0012] In one embodiment of the present invention, the scale assembly includes a scale rod and a slider, scale lines are provided at both ends of the scale rod, and the slider is installed at both ends of the scale rod.

[0013] In one embodiment of the present invention, the slider is slidably connected to the scale rod, and a locking structure is provided between the slider and the scale rod.

[0014] In one embodiment of the present invention, the scale rod is arranged parallel to the second level.

[0015] In one embodiment of the present invention, a height adjustment component is further included, which is connected to the ACR test body and is used to adjust the height difference between the two ends of the ACR test body along its axis.

[0016] In one embodiment of the present invention, the height adjustment assembly includes:

[0017] base;

[0018] a bracket connected to the ACR test body;

[0019] An adjusting bolt is connected to the bracket and to the base, and the adjusting bolt is rotated to adjust the height between the end of the bracket close to the base and the base.

[0020] In one embodiment of the present invention, the bracket includes a support body located inside the coil, the surface of the support body is an arc-shaped groove structure, the arc-shaped groove structure is adapted to the shell, and the ACR test body is placed in the arc-shaped groove structure.

[0021] The utility model proposes an auxiliary positioning device for a magnetic resonance imaging quality inspection phantom. By designing an auxiliary positioning device that integrates a first level, a second level, and a ruler assembly, when the test body is used for testing, the information on the horizontality and sagittal plane deviation can be intuitively viewed through the first level and the second level, and the deviation between the test body and the coil centerline can be intuitively viewed through the ruler assembly. When the test is performed on an MR scanner without a laser beam, the auxiliary positioning device can improve the accuracy of the test body positioning. The deviation and drift angle in the XOZ plane can be easily observed and indicated through the shell, which is convenient for the operator to adjust the position of the test body and can save time and energy for repeatedly adjusting the bubble level. At the same time, due to its universal design, the shell can be applied to different coils for ACR testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the structure of an auxiliary positioning device in one embodiment of the present invention.

[0024] Figure 2 1 is a schematic top view of an auxiliary positioning device in one embodiment of the present invention.

[0025] Figure 3 It is a front view schematic diagram of an auxiliary positioning device in one embodiment of the utility model.

[0026] Figure 4 Schematic diagram of the structure of a height adjustment assembly in one embodiment of the present invention.

[0027] Figure 5 Schematic top view of a height adjustment assembly in one embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the positioning and matching of the auxiliary positioning device in one embodiment of the present utility model.

[0029] Figure 7 This is a schematic front view of the positioning cooperation of the auxiliary positioning device in one embodiment of the utility model.

[0030] Figure 8 It is a top view schematic diagram of the positioning and cooperation of the auxiliary positioning device in one embodiment of the utility model.

[0031] Description of labels:

[0032] 10. Housing; 20. First level; 30. Second level; 40. Scale assembly; 41. Scale rod; 42. Slider; 411. Scale line; 50. Height adjustment assembly; 51. Base; 52. Bracket; 53. Adjustment bolt; 511. Support body; 512. Arc groove structure; 513. Limit plate; 100. ACR test body; 200. Coil. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0034] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0035] See also Figures 1 to 3 、 Figure 6 As shown, the present invention proposes an auxiliary positioning device for a magnetic resonance imaging quality detection phantom to improve the problem that the positioning process of the test body during ACR testing takes a lot of time and is relatively complicated. Specifically, the auxiliary positioning device of the magnetic resonance imaging quality detection phantom includes a shell 10, a first spirit level 20, a second spirit level 30 and a ruler assembly 40. The first spirit level 20 is installed on the shell 10 and is used to detect the horizontality of the ACR test body 100 in the axial direction X after it is placed in the coil 200. The second spirit level 30 is installed on the end face of the shell 10 and is used to detect the horizontality of the ACR test body 100 in the circumferential direction O after it is placed in the coil 200, that is, the deviation information in the sagittal plane. The ruler assembly is installed on the end face of the shell 10 and is used to detect the deviation between the central axis of the ACR test body 100 and the central axis of the coil 200, that is, it can detect the deviation between the central axis of the ACR test body 100 and the central axis of the coil 200 in the Z direction, so as to assist the operator to adjust the position of the ACR test body 100 in the coil 200 and achieve rapid positioning.

[0036] See also Figures 1 to 3As shown, in this embodiment, a transparent window is provided on the shell 10, which is designed as a transparent structure, which is conducive to observing the test body membrane in the ACR test body. At the same time, the shell 10 is an arc-shaped structure, which is convenient for installation and fixation with the ACR test body 100, which is conducive to ensuring the stability of the shell.

[0037] See also Figures 1 to 3 As shown, in this embodiment, the first and second spirit levels 20 and 30 are both bubble level gauges, and are both mounted on the housing 10. The first spirit level 20 extends axially along the ACR test body, i.e., the first spirit level 20 is parallel to the axial direction of the ACR test body, and is used to detect the levelness of the ACR test body 100 in the axial direction X after it is placed in the coil 200. The second spirit level 30 extends radially along the ACR test body, i.e., the second spirit level 30 is parallel to the radial direction of the ACR test body, and is located on the end surface of the housing 10, and is used to detect the levelness of the ACR test body 100 in the circumferential direction after it is placed in the coil 200. It will be understood that in this embodiment, the first and second spirit levels 20 and 30 can be integrated with the housing 10 to facilitate assembly of the various components.

[0038] See also Figures 1 to 3 As shown, in this embodiment, the section passing through the first level 20 and the central axis of the ACR test body 100 is defined as a first plane 101, and the section passing through the second level 30 and the central axis of the ACR test body is defined as a second plane 102. In this embodiment, the first plane 101 and the second plane 102 are perpendicular to each other to ensure that the first level 20 and the second level 30 can accurately display the horizontality deviation information of the ACR test body 100 in the axial direction X and the circumferential direction O after being placed in the coil 200.

[0039] See also Figures 1 to 3As shown, in this embodiment, the scale assembly 40 includes a scale rod 41 and a slider 42. Scale lines 411 are provided at both ends of the scale rod 41. Sliders 42 are mounted on both ends of the scale rod 41. Sliders 42 are slidably connected to the scale rod 41, and a locking mechanism is provided between the sliders 42 and the scale rod 41. After the ACR test body 100 is placed within the coil 200, the sliders 42 are pushed and slid on the scale rod 41, causing the sliders 42 at both ends of the scale rod 41 to abut against the outer sides of the coil 200. The locking mechanism locks the sliders 42. The readings of the sliders 42 on the scale rod 41 are read using the scale lines 411. The deviation between the central axis of the ACR test body 100 and the central axis of the coil 200 is then determined based on these readings. The position of the ACR test body 100 within the coil 200 is then adjusted along the Z-axis based on this deviation. It will be appreciated that the scale rod 41 is arranged parallel to the second level 30 to ensure accurate determination of the central axis deviation, which facilitates accurate positioning of the ACR test body. It can also be understood that the first level 20 , the second level 30 and the scale rod 41 can be integrated with the housing 10 to facilitate assembly of the various components.

[0040] See also Figures 4 to 6 As shown, in this embodiment, the auxiliary positioning device further includes a height adjustment assembly 50, which is connected to the ACR test body 100 and is used to adjust the height difference between the two ends of the ACR test body 100 along its axis. In this embodiment, the height adjustment assembly 50 includes a base 51, a bracket 52, and an adjustment bolt 53. The bracket 52 is connected to the ACR test body 10, and the adjustment bolt 53 is connected to the bracket 52 and the base 51. Rotating the adjustment bolt 53 adjusts the height between the end of the bracket 52 closest to the base 51 and the base 51, thereby adjusting the height difference between the two ends of the ACR test body 100 along its axis.

[0041] See also Figures 4 to 6 As shown, in this embodiment, the bracket 52 includes a support body 521 positioned within the coil. The surface of the support body 521 has an arcuate groove structure 522 that mates with the ACR test body 100. The ACR test body 100 is placed within the arcuate groove structure 522. The design of the arcuate groove structure 522 and its interaction with the ACR test body 100 facilitate rotation of the ACR test body 100 about its central axis on the support body 521, thereby adjusting the levelness of the ACR test body 100 in the circumferential direction O after placement within the coil 200. It will be appreciated that a limit plate 523 is provided on the side of the support body 521 proximal to the base 51. When the ACR test body 100 is placed on the support body 521, the limit plate 523 abuts against the end surface of the ACR test body 100 proximal to the base 51 to limit axial sliding of the ACR test body 100, thereby ensuring accurate positioning of the ACR test body 100.

[0042] See also Figure 1 、 Figure 4 、 Figures 6 to 8 As shown, taking the head coil as an example, the expected workflow for ACR testing using this auxiliary positioning device is as follows:

[0043] Insert the head coil 200 into the slot and remove the upper coil.

[0044] The ACR test body 100 is placed under the coil 200 , and then the auxiliary positioning device without the slider 42 is placed on the ACR test body 10 .

[0045] According to the bubble positions of the first level 20 and the second level 30 on the auxiliary positioning device, the position of the ACR test body 100 is properly adjusted, for example, by using the height adjustment assembly 50 described in the above embodiment or by using cushions, sandbags or paper for support adjustment.

[0046] Assemble the slider 42 on the scale rod 41 and push the slider toward the side of the head coil 200, check the reading of the scale line 411 on the scale rod 41 and the fit between the slider 42 and the side of the head coil 200, and calibrate the ACR test body accordingly.

[0047] Insert the upper coil into the slot and feed it, along with the auxiliary positioning device, into the bore of the MRI scanner;

[0048] Use the recommended scanning sequence to scan and check whether the position of the test object meets the requirements based on the images of specific slices. If not, pull out the patient table and repeat the above steps until the scan results meet the requirements.

[0049] The utility model proposes an auxiliary positioning device for a magnetic resonance imaging quality inspection phantom. By designing an auxiliary positioning device that integrates a first level, a second level, and a ruler assembly, when the test body is used for testing, the information on the horizontality and sagittal plane deviation can be intuitively viewed through the first level and the second level, and the deviation between the test body and the coil centerline can be intuitively viewed through the ruler assembly. When the test is performed on an MR scanner without a laser beam, the auxiliary positioning device can improve the accuracy of the test body positioning. The deviation and drift angle in the XOZ plane can be easily observed and indicated through the shell, which is convenient for the operator to adjust the position of the test body and can save time and energy for repeatedly adjusting the bubble level. At the same time, due to its universal design, the shell can be applied to different coils for ACR testing.

[0050] It should be understood that references throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein are possible in light of the teachings herein and are considered part of the spirit and scope of the present invention.

[0051] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0052] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as the technical solutions formed by the mutual replacement of the above-mentioned features with the technical features with similar functions disclosed in this application (but not limited to).

[0053] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. An auxiliary positioning device for a magnetic resonance imaging quality inspection phantom, characterized in that: include: a housing mounted on the ACR test body; a first level, mounted on the housing, for detecting the horizontality of the ACR test body in the axial direction after the test body is placed in the coil; a second level, mounted on an end face of the housing, for detecting the levelness of the ACR test body in the circumferential direction after the test body is placed in the coil; A scale assembly is mounted on the end surface of the housing and is used to detect the deviation between the central axis of the ACR test body and the central axis of the coil.

2. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 1, characterized in that: The first level is arranged along the axial extension of the ACR test body.

3. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 2, characterized in that: The second level is arranged along a radial direction of the ACR test body.

4. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 3, characterized in that: A section passing through the central axis of the first level and the ACR test body is a first plane, and a section passing through the central axis of the second level and the ACR test body is a second plane. The first plane and the second plane are perpendicular to each other.

5. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 1, characterized in that: The scale assembly includes a scale rod and a slider. Scale lines are provided at both ends of the scale rod, and the sliders are installed at both ends of the scale rod.

6. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 5, characterized in that: The slider is slidably connected to the scale rod, and a locking structure is provided between the slider and the scale rod.

7. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 1, characterized in that: The scale rod is arranged parallel to the second level.

8. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 1, characterized in that: It also includes a height adjustment component, which is connected to the ACR test body and is used to adjust the height difference between the two ends of the ACR test body along its axis.

9. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 8, characterized in that: The height adjustment assembly comprises: base; a bracket connected to the ACR test body; An adjusting bolt is connected to the bracket and to the base, and the adjusting bolt is rotated to adjust the height between the end of the bracket close to the base and the base.

10. The auxiliary positioning device for the magnetic resonance imaging quality inspection phantom according to claim 9, characterized in that: The bracket includes a support body located in the coil, the surface of the support body is an arc-shaped groove structure, the arc-shaped groove structure is adapted to the shell, and the ACR test body is placed in the arc-shaped groove structure.

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