Detector bearing assembly and emission type computed tomography device

Abstract

The utility model discloses a detector bearing assembly and an emission type computed tomography device, the detector bearing assembly comprises a first moving mechanism, a housing and a sheet-shaped baffle plate, the first moving mechanism comprises a first moving plate used for bearing a detector and a first fixed plate in sliding connection with the first moving plate, the first moving plate moves along a first straight line relative to the first fixed plate. The shell is fixedly connected with the first moving plate and at least shields the front face and the peripheral side faces of the first moving mechanism. The baffle is located on the back face of the first moving mechanism and close to the side, back to the first moving plate, of the first fixing plate, and the two ends, parallel to the first straight line, of the baffle are fixedly connected with the shell. The first moving plate is provided with connecting parts used for being connected with a main machine frame of the emission type computed tomography device, and the connecting parts are located on the two sides of the baffle in the direction perpendicular to the first straight line. The detector bearing assembly provided by the utility model has higher safety.

Description

Technical Field

[0001] This utility model relates to the field of medical imaging equipment technology, and in particular to a detector carrier component and a transmission computed tomography (CT) imaging device. Background Technology

[0002] Emission computed tomography (ECT) devices, such as SPECT (single-photon emission computed tomography), are equipped with a detector carrier assembly that can move linearly in a vertical plane relative to the main frame. The detector carrier assembly has its own moving mechanism that allows it to move in a centripetal or centrifugal linear motion. Its main function is to bring the detector as close as possible to the patient on the examination table when acquiring data.

[0003] The detector carrier assembly is mounted on a rotating mechanism of the main frame, which causes the carrier assembly to move in a circular motion in the vertical plane. According to assembly requirements, the horizontal distance between the carrier assembly and the rotating mechanism is very small. Therefore, currently, the outer shell of the carrier assembly only covers the front and four sides, while the back (the side facing the rotating mechanism) is mainly shielded by the rotating mechanism's outer shell. However, the rotating mechanism's outer shell is a ring structure with a circular opening in the center through which the examination bed can extend. When the carrier assembly moves centripetally towards the patient on the examination bed, a portion of the carrier assembly extends beyond the inner wall of the circular opening in the rotating mechanism's outer shell. This means that this portion of the carrier assembly exceeds the shielding range of the rotating mechanism's outer shell, potentially leading to the patient touching the carrier assembly and causing unacceptable risks such as compression or shearing. Although the commonly used method of setting warning labels can mitigate these risks to some extent, the safety of the carrier assembly needs further improvement. Utility Model Content

[0004] In view of this, one objective of this invention is to provide a detector carrier assembly with higher security. Another objective of this invention is to provide an emission-type computed tomography imaging device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A detector carrier assembly for an emission computed tomography (ECT) device, comprising:

[0007] A first moving mechanism, the first moving mechanism includes a first moving plate for carrying the detector and a first fixed plate slidably connected to the first moving plate, the first moving plate moving relative to the first fixed plate along a first straight line;

[0008] The outer casing is fixedly connected to the first movable plate and at least covers the front and four sides of the first movable mechanism;

[0009] A thin, sheet-like baffle is located on the back of the first moving mechanism;

[0010] The baffle is disposed close to the side of the first fixed plate facing away from the first movable plate. The two ends of the baffle in the direction parallel to the first straight line are fixedly connected to the outer shell. The first movable plate is provided with a connecting part for connecting to the main frame of the emission computed tomography imaging device. The connecting part is located on both sides of the baffle in the direction perpendicular to the first straight line.

[0011] Optionally, in the above-mentioned detector carrying assembly, the baffle is a stainless steel plate, a galvanized steel plate, a carbon steel plate, or an organic plastic plate.

[0012] Optionally, in the above-mentioned detector carrier assembly, the thickness of the baffle is 0.3 mm to 1.5 mm.

[0013] Optionally, in the detector carrier assembly described above, the baffle has bent edges at both ends in a direction parallel to the first straight line, the bent edges are wrapped with ruler-shaped pressure plates, and the pressure plates have mounting holes for screws.

[0014] Optionally, in the above-mentioned detector carrier assembly, the mounting hole is a countersunk hole structure.

[0015] Optionally, the detector carrying assembly described above includes a gear and rack transmission mechanism and / or a lead screw and nut transmission mechanism that connects the first movable plate and the first fixed plate.

[0016] Optionally, in the detector carrier assembly described above, a warning sign is provided on the side of the baffle facing away from the first fixed plate.

[0017] An emission computed tomography apparatus includes a detector carrier assembly as disclosed in any of the above claims.

[0018] Optionally, in the above-described emission computed tomography (ECT) apparatus, a main frame with a second moving mechanism is included. The second moving mechanism includes a second moving plate for carrying the detector carrier assembly and a second fixed plate slidably connected to the second moving plate. The second moving plate moves relative to the second fixed plate along a second straight line, which is perpendicular to the first straight line. The baffle passes through the gap between the first fixed plate and the second moving plate.

[0019] Optionally, in the above-described emission computed tomography apparatus, the distance between the housing of the detector carrier assembly and the housing of the second moving mechanism is no greater than 8 mm.

[0020] The detector carrier assembly provided by this utility model has the following beneficial effects:

[0021] The outer shell of the detector carrier assembly at least covers the front and four sides of the first moving mechanism. At the same time, a thin baffle is connected to the outer shell and located on the back of the first moving mechanism. The two ends of the baffle in the direction of movement of the first moving mechanism are fixedly connected to the edges of the outer shell. While not affecting the movement of the outer shell relative to the first fixed plate with the first moving plate of the first moving mechanism, the area on the back of the detector carrier assembly that may be exposed is reduced. This reduces the possibility of patients on the examination bed touching the detector carrier assembly and causing unacceptable accidents such as crushing and shearing, making the detector carrier assembly safer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a three-dimensional schematic diagram of a radiation-type computed tomography (RTC) device;

[0024] Figure 2 From Figure 1 A partial structural diagram of the mainframe viewed from the back;

[0025] Figure 3 yes Figure 1 A side view of the detector carrier assembly and the second moving mechanism.

[0026] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the detector carrier assembly and the second moving mechanism;

[0027] Figure 5 yes Figure 4 A three-dimensional schematic diagram of the second moving mechanism in the diagram;

[0028] Figure 6 yes Figure 4 A three-dimensional schematic diagram of the first moving mechanism of the detector carrying assembly;

[0029] Figure 7 yes Figure 6 A schematic diagram of the structure shown from another angle;

[0030] Figure 8 This is a schematic diagram of the motion process of the first moving mechanism of the detector carrier component;

[0031] Figure 9 This is a schematic diagram of the detector carrier assembly provided in an embodiment of the present utility model;

[0032] Figure 10 It is along Figure 9 A sectional view along the CC line (some parts are omitted).

[0033] Figure 11 yes Figure 9 A schematic diagram of the baffle structure.

[0034] The diagram is marked as follows:

[0035] 1. Main frame; 11. Rotating mechanism; 12. Second moving mechanism; 121. Second moving plate; 122. Second fixed plate; 123. Second guide rail; 124. Second lead screw; 125. Second drive assembly;

[0036] 2. Detector carrier assembly; 21. First movable plate; 22. First fixed plate; 221. Connecting part; 23. Housing; 24. Rack; 25. First drive assembly; 26. First guide rail; 27. First lead screw; 28. Baffle; 281. Bending edge; 29. ​​Pressure plate;

[0037] 3. Detector; 4. Inspection bed; 5. Screw. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] See Figures 1-11This utility model provides a detector carrier assembly 2 for an emission computed tomography (ECT) device. The detector carrier assembly 2 includes a first moving mechanism, a housing 23, and a sheet-like baffle 28. The first moving mechanism includes a first moving plate 21 for carrying a detector 3 and a first fixed plate 22 slidably connected to the first moving plate 21. The first moving plate 21 moves relative to the first fixed plate 22 along a first straight line. The housing 23 is fixedly connected to the first moving plate 21, at least covering the front and four sides of the first moving mechanism. The baffle 28 is located on the back of the first moving mechanism, close to the first fixed plate 22, facing away from the first moving plate 21. The two ends of the baffle 28 in a direction parallel to the first straight line are fixedly connected to the housing 23. The first moving plate 21 is provided with a connecting portion 221 for connecting to the main frame 1 of the ECT device. The connecting portion 221 is located on both sides of the baffle 28 in a direction perpendicular to the first straight line.

[0040] The detector 3 is fixedly mounted on the first moving plate 21 of the first moving mechanism. The first fixed plate 22 of the first moving mechanism is mounted to the main frame 1 via a connecting part 221. The outer shell 23 is fixedly connected to the first moving plate 21, and the baffle 28 is fixedly connected to the outer shell 23. Therefore, when the first moving plate 21 moves relative to the first fixed plate 22 along the first straight line, the detector 3, the outer shell 23, and the baffle 28 move together with the first moving plate 21. After the detector carrier assembly 2 is assembled into the emission computed tomography imaging device, the first straight line is a straight line in the vertical plane. The detector 3 moves closer to or further away from the patient on the examination bed 4 based on the relative movement of the first moving plate 21 and the first fixed plate 22. Figure 1 As shown, the detector carrier assembly 2 is located between the detector 3 and the main frame 1. The front of the first moving mechanism refers to the side facing the detector 3, and the back of the first moving mechanism refers to the side facing the main frame 1. The baffle 28 is positioned close to the first fixed plate 22, meaning that the baffle 28 is very close to the first fixed plate 22 but does not contact it. Since the baffle 28 moves along a first straight line relative to the first fixed plate 22 with the first moving plate 21, and the connecting portion 221 on the first fixed plate 22 is located on both sides of the baffle 28 in a direction perpendicular to the first straight line, the connecting portion 221 will not interfere with the moving baffle 28.

[0041] It should be noted that, in order to facilitate understanding of the differences between the detector carrier component 2 of this utility model and the prior art, Figures 1-8 The baffle 28 of the detector-carrying component 2 is not shown in the image, especially... Figure 2 This clearly demonstrates the high-risk situation inherent in the prior art without the baffle 28, where the back of the detector carrier assembly 2 is exposed without shielding in the circular hole of the rotating mechanism 11 of the main frame 1. This could result in unacceptable risks such as patient contact with the detector carrier assembly 2, leading to compression and shearing. Figure 9As shown, the detector carrier assembly 2 of this invention has a baffle 28 on its back. The two ends of the baffle 28 in the direction of movement of the first moving mechanism are fixedly connected to the edges of the outer casing 23. This effectively reduces the aforementioned risks and improves the safety of the detector carrier assembly 2. In other words, after the detector carrier assembly 2 is used in the emission computed tomography (ECT) device, the baffle 28 can effectively shield the moving or rotating parts of the detector carrier assembly 2, preventing accidents.

[0042] The material and thickness of the baffle 28 can be selected from various options. In some embodiments, the baffle 28 can be made of stainless steel, galvanized steel, carbon steel, or organic plastic. The thickness of the baffle 28 can be 0.3 mm to 1.5 mm, for example, 0.5 mm, 0.8 mm, or 1 mm. Because the baffle 28 is a thin sheet, it possesses a certain degree of flexibility, meaning it can withstand a certain degree of bending deformation and automatically return to its flat shape after the external force is removed. This flexibility facilitates its assembly into the detector carrier assembly 2. For example, if deviations in the manufacturing or assembly process cause a certain deviation in the position of the gap for the baffle 28 in other components surrounding it, the assembly can be completed by bending the baffle 28 to pass through this gap. Furthermore, while possessing a certain degree of flexibility, the baffle 28 also exhibits a certain degree of toughness, especially when it is a thin metal sheet, where its toughness is particularly good. During the operation of the first moving mechanism of the detector carrier component 2, when an unexpected situation occurs, the movement of the first moving mechanism may cause the baffle 28 to be squeezed and deformed. The toughness of the baffle 28 prevents it from breaking immediately when squeezed and deformed, thus allowing the device's emergency shutdown procedure to set a relatively long reaction time.

[0043] like Figure 9 As shown, the baffle 28 covers most of the first fixing plate 22. It is easy to understand that, while satisfying the conditions for setting the connecting part 221, the first fixing plate 22 should leave as much area as possible for the baffle 28, so that the baffle 28 can cover a larger area, thereby minimizing the area where the back of the detector carrier assembly 2 may be exposed. Since the end of the back of the detector carrier assembly 2 closer to the patient on the examination bed 4 has a greater risk of exposure, the end of the housing 23 closer to the examination bed 4 in the direction parallel to the first straight line can be made smaller. For example, in... Figure 9 In the exemplary embodiment shown, the lower end of the housing 23 is configured as a trapezoidal structure that narrows from both sides towards the middle. Additionally, although... Figure 9The side of the baffle 28 near the connecting portion 221 is a straight edge. However, in other embodiments, without affecting the movement of the baffle 28 relative to the first fixed plate 22, the side of the baffle 28 can also be set to other contour shapes. For example, the side of the baffle 28 can be set as an inwardly concave arc edge, or the baffle 28 can be made of... Figure 9 The rectangle shown is changed to an I-shape and a T-shape, that is, the width of the upper and / or lower ends of the baffle 28 is increased, exceeding the width of the middle part of the baffle 28.

[0044] There are several ways to fix the baffle 28 to the housing 23. In some embodiments, the baffle 28 can be fixed to the housing 23 by screws 5. In other embodiments, the baffle 28 can also be fixed to the housing 23 by other methods such as welding or bonding. Figure 9 and Figure 11 As shown, in the embodiment where the baffle 28 is fixed to the outer casing 23 by screws 5, the baffle 28 may have bent edges 281 at both ends in the direction parallel to the first straight line. The bent edges 281 wrap around a ruler-shaped pressure plate 29. The pressure plate 29 has mounting holes for the screws 5 to pass through. The pressure plate 29 serves to fix and support the baffle 28, making the baffle 28 less prone to deformation. The mounting holes on the pressure plate 29 may be countersunk holes to prevent the screws 5 from protruding from the outer surface of the baffle 28.

[0045] To achieve relative movement between the first moving plate 21 and the first fixed plate 22, the detector carrying assembly 2 may include a gear and rack transmission mechanism and / or a lead screw and nut transmission mechanism connecting the first moving plate 21 and the first fixed plate 22. For example... Figures 6-8 As shown, in some embodiments, a first guide rail 26 and a first lead screw 27 parallel to a first straight line, and a first drive assembly 25 for driving the first lead screw 27 to rotate, may be provided on the first movable plate 21. A slider that slides with the first guide rail 26 and a threaded structure that engages with the first lead screw 27 are provided on the first fixed plate 22. When the first lead screw 27 rotates, the first movable plate 21 and the first fixed plate 22 slide relative to each other. Figure 8 As shown, with the first fixed plate 22 maintaining its spatial position, the rotation of the first lead screw 27 allows the outer shell 23 and the first moving plate 21 to move downwards as a whole along arrow B. Of course, the reverse rotation of the first lead screw 27 can cause the outer shell 23 and the first moving plate 21 to move back along the opposite direction of arrow B.

[0046] like Figures 6-8 As shown, in some embodiments, a rack 24 and a first guide rail 26 parallel to a first straight line can be provided on the first moving plate 21, and a drive gear meshing with the rack 24 and a slider slidingly engaging with the first guide rail 26 are provided on the first fixed plate 22. When the drive gear rotates, the first moving plate 21 and the first fixed plate 22 slide relative to each other. Figure 8 As shown, with the first fixed plate 22 maintaining its spatial position, the rotation of the drive gear allows the outer shell 23 and the first moving plate 21 to move downwards as a whole along arrow B. Of course, the reverse rotation of the drive gear can cause the outer shell 23 and the first moving plate 21 to move back along the opposite direction of arrow B.

[0047] To further enhance safety, a warning sign may be provided on the side of the baffle 28 facing away from the first fixing plate 22. The warning sign may be a pattern and / or slogan printed on the baffle 28, or a label with a pattern and / or slogan affixed to the baffle 28. The warning sign serves to remind the patient on the examination bed 4 not to touch it to avoid danger, thus further improving safety. Alternatively, the side of the baffle 28 facing away from the first fixing plate 22 may also be painted with a warning color, such as yellow, orange, or red, to further remind the patient not to touch it.

[0048] This utility model also provides an emission computed tomography (ECT) device, including the detector carrier assembly 2 disclosed in the above embodiments. Since the detector carrier assembly 2 disclosed in the above embodiments has the aforementioned technical effects, the emission computed tomography device having this detector carrier assembly 2 also has the aforementioned technical effects, and will not be described again here.

[0049] The emission computed tomography (ECT) apparatus can be a single-photon emission computed tomography (SPECT) apparatus, or other types of emission computed tomography (ECT) apparatus. In some embodiments, the emission computed tomography (ECT) apparatus may include a main frame 1 with a second moving mechanism 12. The second moving mechanism 12 includes a second moving plate 121 for supporting a detector support assembly 2 and a second fixed plate 122 slidably connected to the second moving plate 121. The second moving plate 121 moves relative to the second fixed plate 122 along a second straight line, the second straight line being perpendicular to a first straight line. A baffle 28 passes through the gap between the first fixed plate 22 and the second moving plate 121. (Reference) Figure 1 The detector carrier assembly 2's own first moving mechanism enables the detector 3 to move up and down, and the main frame 1's second moving mechanism 12 enables the detector carrier assembly 2 and the detector 3 to move laterally as a whole. The second moving mechanism 12 is mounted on the main frame 1's rotating mechanism 11, which enables the detector carrier assembly 2, the detector 3, and the second moving mechanism 12 to perform circular motion as a whole. Figure 3As shown, according to relevant regulations, the distance 'a' between the outer shell 23 of the detector carrier assembly 2 and the outer shell of the second moving mechanism 12 needs to be less than a preset value. Therefore, in some embodiments, the distance 'a' is set to no more than 8 mm. Of course, in other embodiments, the detector carrier assembly 2 can also be directly mounted on the rotating mechanism 11 of the main frame 1, that is, this utility model does not limit whether the main frame 1 is equipped with the second moving mechanism 12. It is easy to understand that when the second moving mechanism 12 is not provided, the above-mentioned distance 'a' refers to the distance between the outer shell 23 of the detector carrier assembly 2 and the outer shell of the rotating mechanism 11.

[0050] like Figure 4 and Figure 10 As shown, the first fixed plate 22 of the first moving mechanism is mounted on the second moving plate 121 of the second moving mechanism 12. The baffle 28 mounted on the housing 23 passes through the gap between the first fixed plate 22 and the second moving plate 121. The gap is larger than the thickness of the baffle 28. Therefore, when the first moving plate 21 and the first fixed plate 22 move relative to each other, the baffle 28 can pass smoothly through the gap.

[0051] To achieve relative movement between the second moving plate 121 and the second fixed plate 122, the main frame 1 may include a lead screw and nut transmission mechanism connecting the second moving plate 121 and the second fixed plate 122. For example... Figure 5 As shown, in some embodiments, a second guide rail 123 and a second lead screw 124 parallel to a second straight line, and a second drive assembly 125 for driving the second lead screw 124 to rotate, may be provided on the second fixed plate 122. A slider that slides with the second guide rail 123 and a threaded structure that engages with the second lead screw 124 are provided on the second moving plate 121. When the second lead screw 124 rotates, the second moving plate 121 and the second fixed plate 122 slide relative to each other. Of course, in other embodiments, the second moving plate 121 and the second fixed plate 122 may also be connected by other means such as a gear and rack transmission mechanism.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A detector carrier assembly for an emission computed tomography (ECT) device, characterized in that, include: A first moving mechanism, the first moving mechanism includes a first moving plate for carrying the detector and a first fixed plate slidably connected to the first moving plate, the first moving plate moving relative to the first fixed plate along a first straight line; The outer casing is fixedly connected to the first movable plate and at least covers the front and four sides of the first movable mechanism; A thin, sheet-like baffle is located on the back of the first moving mechanism; The baffle is disposed close to the side of the first fixed plate facing away from the first movable plate. The two ends of the baffle in the direction parallel to the first straight line are fixedly connected to the outer shell. The first movable plate is provided with a connecting part for connecting to the main frame of the emission computed tomography imaging device. The connecting part is located on both sides of the baffle in the direction perpendicular to the first straight line.

2. The detector carrier assembly according to claim 1, characterized in that, The baffle is made of stainless steel, galvanized steel, carbon steel, or organic plastic.

3. The detector carrier assembly according to claim 2, characterized in that, The thickness of the baffle is 0.3 mm to 1.5 mm.

4. The detector carrier assembly according to claim 1, characterized in that, The baffle has bent edges at both ends in a direction parallel to the first straight line. The bent edges are wrapped with ruler-shaped pressure plates, and the pressure plates have mounting holes for screws.

5. The detector carrier assembly according to claim 4, characterized in that, The mounting hole is a countersunk hole structure.

6. The detector carrier assembly according to any one of claims 1 to 5, characterized in that, It includes a gear and rack transmission mechanism and / or a lead screw and nut transmission mechanism that connect the first movable plate and the first fixed plate.

7. The detector carrier assembly according to claim 6, characterized in that, A warning sign is provided on the side of the baffle that faces away from the first fixed plate.

8. A radiation-type computed tomography (CT) imaging device, characterized in that, Includes the detector carrier assembly as described in any one of claims 1 to 7.

9. The emission computed tomography (CT) device according to claim 8, characterized in that, The device includes a main frame with a second moving mechanism, the second moving mechanism including a second moving plate for carrying the detector carrying assembly and a second fixed plate slidably connected to the second moving plate, the second moving plate moving relative to the second fixed plate along a second straight line, the second straight line being perpendicular to the first straight line, and the baffle passing through the gap between the first fixed plate and the second moving plate.

10. The emission computed tomography (CT) imaging device according to claim 9, characterized in that, The distance between the outer shell of the detector carrier assembly and the outer shell of the second moving mechanism is no greater than 8 mm.

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