Head positioning device for PET / MR

Abstract

The invention discloses a PET / MR head positioning device which comprises a fixing plate, threaded holes are symmetrically formed in the fixing plate, threaded heads are installed in the threaded holes in a threaded mode, connecting studs are fixedly connected to the upper ends of the threaded heads, extrusion nuts are installed on the connecting studs in a threaded mode, and limiting brackets are symmetrically arranged on the fixing plate. The inner sides of the limiting brackets are cambered surfaces, first rubber pads are attached to the cambered surfaces, connecting plates are fixedly connected to the separated faces of the two limiting brackets, side face extrusion frames are symmetrically arranged on the fixing plate, second rubber pads are attached to the opposite faces of the two side face extrusion frames, and connecting plates are fixedly connected to the separated faces of the two side face extrusion frames. Through cooperation of the limiting bracket, the side extrusion frame and the medical fixing band, the position of the head of a patient can be fixed, the whole device is made of a non-metal material, and the problem that in the nuclear magnetic examination process, a high-intensity magnetic field generated by equipment can interact with the device can be effectively solved.

Description

Technical Field

[0001] The present invention relates to a head positioning device, and more particularly to a head positioning device for PET / MR. Background Art

[0002] In PET / MR scans, the application scenarios of head fixation devices mainly include cranial scans. Since cranial scans require high-precision image acquisition, even minor head movements can lead to a decline in image quality. Therefore, the use of a head fixation device can ensure the stability of the patient's head position during the scan, reduce motion artifacts, and improve the quality of the images and the accuracy of diagnosis.

[0003] For example, a head positioning device for PET / MR disclosed in Chinese Patent with the publication number CN118356181B includes a positioning arc plate, a headrest-type fixing mechanism, and a reflux-type fog elimination mechanism. The headrest-type fixing mechanism is provided on the positioning arc plate, and the reflux-type fog elimination mechanism is provided on the headrest-type fixing mechanism. The headrest-type fixing mechanism includes a soft pillow mechanism and a head abutting mechanism. The soft pillow mechanism is provided on the upper wall of the positioning arc plate, and the head abutting mechanism is provided on the side walls at both ends of the positioning arc plate. The present invention provides a head positioning device for PET / MR that can independently and adjustably clamp the patient's head and face, can disinfect the contact surface between the positioning structure and the patient after use, and can provide sound insulation protection for the patient's ears. However, this patent has the following problems:

[0004] It uses a large number of metal products such as solenoid valves and springs inside. During the nuclear magnetic examination, the strong magnetic field generated by the equipment will interact with the metal, causing safety problems or interfering with imaging. Metal objects may be attracted by the magnetic field, resulting in displacement, heating, and even causing harm. At the same time, the metal will also generate artifacts, affecting the diagnostic accuracy. Summary of the Invention

[0005] The purpose of the present invention is to provide a head positioning device for PET / MR to solve the problems presented in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A head positioning device for PET / MR includes a fixing plate. Symmetric threaded holes are opened on the upper surface of the fixing plate. Threaded heads are threadedly installed in the threaded holes. A connecting stud is fixedly connected to the upper end of the threaded head. An extrusion nut is threadedly installed on the connecting stud.

[0007] Symmetric limiting brackets are provided on the upper surface of the fixing plate. The inner side of the limiting bracket is arc-shaped, and a first rubber pad is attached to the arc surface. Connecting plates are fixedly connected to the separated surfaces of the two limiting brackets.

[0008] On the upper surface of the fixed plate, side extrusion frames are symmetrically arranged. Second rubber pads are attached to the opposite surfaces of the two side extrusion frames, and connecting plates are fixedly connected to the separated surfaces.

[0009] The heights of the connecting plates on the limiting bracket and the side extrusion frames are different. A rubber anti-slip pad is provided in the connecting plate, and the rubber anti-slip pad cooperates with the connecting stud.

[0010] Preferably, fixing holes are provided at positions near the four corners inside the fixed plate.

[0011] Preferably, a number of first card holes are provided on the lower surface of the limiting bracket, and a number of plastic fasteners are fixedly connected to the lower surface of the first rubber pad. The plastic fasteners are snap-fitted into the first card holes.

[0012] Preferably, a number of second card holes are provided on one side of the side extrusion frame, and a number of plastic fasteners are fixedly connected to the other side of the second rubber pad. The plastic fasteners are snap-fitted into the second card holes.

[0013] Preferably, rubber anti-slip pads are fixedly connected above the connecting plate and in front of and behind the connecting chute. The rubber anti-slip pads cooperate with the extrusion nuts.

[0014] Preferably, a limiting chute is provided on the upper surface of the side extrusion frame, and an avoidance hole is provided in the side extrusion frame. The avoidance hole cooperates with the connecting plate.

[0015] Preferably, a limiting slider is slidably installed in the limiting chute, and a buckle is fixedly connected to the upper surface of the limiting slider.

[0016] Preferably, a medical fixing band is provided above the fixed plate, and the medical fixing band cooperates with the buckle.

[0017] Preferably, a female magic tape is fixedly connected to the center of the upper surface of the medical fixing band, and male magic tapes are fixedly connected to positions near the two side edges of the upper surface of the medical fixing band. The male magic tapes and the female magic tape cooperate with each other.

[0018] Preferably, the whole device is made of non-metallic material.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By using the cooperation of the limiting bracket, the side extrusion frame and the medical fixing band, the position of the patient's head can be fixed. The whole device is made of non-metallic material, which can effectively avoid the problem that the strong magnetic field generated by the equipment will interact with the device during the nuclear magnetic resonance examination.

[0021] 2. By using the extrusion nut to press down the connecting plate to fix the limit bracket and the side extrusion frame, after the inspection is completed, the extrusion nut can be unscrewed to remove the limit bracket and the side extrusion frame respectively, which is convenient for cleaning and disinfecting the surface of the device in the later stage.

[0022] 3. The plastic fastener is a common plastic buckle. The plastic fastener is snap-fitted inside the first card hole and the second card hole. After the first rubber pad and the second rubber pad are aged or damaged in the later stage, the plastic fastener can be directly snapped out from the first card hole and the second card hole, which is convenient for removing and replacing in the later stage. Brief Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the present invention during use;

[0024] Figure 2 is the overall structural schematic diagram of the present invention;

[0025] Figure 3 is the structural schematic diagram of the fixing plate of the present invention;

[0026] Figure 4 is the exploded view of the limit bracket of the present invention;

[0027] Figure 5 is the partial exploded view of the present invention.

[0028] In the figure: 1. Fixing plate; 101. Fixing hole; 102. Threaded hole; 2. Connecting stud; 201. Threaded head; 202. Extrusion nut; 3. Limit bracket; 301. First card hole; 302. First rubber pad; 4. Plastic fastener; 5. Connecting plate; 501. Connecting chute; 502. Rubber anti-slip pad; 6. Side extrusion frame; 601. Avoidance hole; 602. Second card hole; 603. Limit chute; 604. Second rubber pad; 7. Buckle; 701. Limit slider; 8. Medical fixing band; 801. Male magic tape; 802. Female magic tape. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1-5 shown, the present invention has the following specific embodiments.

[0031] Embodiment 1

[0032] A head positioning device for PET / MR, comprising a fixed plate 1. Threaded holes 102 are symmetrically formed on the upper surface of the fixed plate 1. A threaded head 201 is threadedly installed in the threaded hole 102. A connecting stud 2 is fixedly connected to the upper end of the threaded head 201. An extrusion nut 202 is threadedly installed on the connecting stud 2.

[0033] Limiting brackets 3 are symmetrically arranged on the upper surface of the fixed plate 1. The inner sides of the limiting brackets 3 are arc-shaped. A first rubber pad 302 is attached to the arc surface. Connecting plates 5 are fixedly connected to the separated surfaces of the two limiting brackets 3.

[0034] Side extrusion frames 6 are symmetrically arranged on the upper surface of the fixed plate 1. Second rubber pads 604 are attached to the opposite surfaces of the two side extrusion frames 6. Connecting plates 5 are fixedly connected to the separated surfaces.

[0035] The connecting plates 5 on the limiting brackets 3 and the side extrusion frames 6 have different heights. Rubber anti-slip pads 502 are provided in the connecting plates 5. The rubber anti-slip pads 502 cooperate with the connecting stud 2.

[0036] In this embodiment, through the symmetrically arranged limiting brackets 3 on the left and right, the lower region of the patient's head can be supported. The arc surface on one side enables the limiting brackets 3 to fit the patient's head as much as possible. The upper ends of the side extrusion frames 6 are inclined inward. As Figure 2 shown, it can squeeze and fit the position above the patient's head. Then, by the cooperation of the limiting brackets 3 and the side extrusion frames 6, the patient's head is fixed, avoiding the unconscious shaking of the head during the nuclear magnetic examination, which affects the examination results. The connecting plates 5 on the side extrusion frames 6 and the limiting brackets 3 have different heights and are staggered from each other. Then, the connecting plate 5 on the limiting bracket 3 can be stacked on the connecting plate 5 on the side extrusion frame 6. The rubber anti-slip pads 502 are used to enable the connecting stud 2 to pass through the two connecting plates 5 respectively. Subsequently, the extrusion nut 202 is tightened, and the two connecting plates 5 can be pressed tightly on the fixed plate 1 by the extrusion nut 202. The positions of the limiting brackets 3 and the side extrusion frames 6 are fixed by the connecting plates 5, avoiding the change of the positions of the limiting brackets 3 and the side extrusion frames 6 after being stressed. The connecting stud 2 and the extrusion nut 202 are also made of plastic material. Due to the low hardness of the plastic material, during high-intensity use, the threads on the connecting stud 2 may be worn and cause the situation of slipping threads. The connecting stud 2 is threadedly installed on the fixed plate 1 through the threaded head 201 and the threaded hole 102. After the connecting stud 2 is severely worn, the connecting stud 2 can be directly unscrewed and replaced.

[0037] Embodiment 2

[0038] There are fixing holes 101 opened at positions near the four corners inside the fixing plate 1. A number of first card holes 301 are opened below the limit bracket 3. A number of plastic fasteners 4 are fixedly connected below the first rubber pad 302. The plastic fasteners 4 are clamped in the first card holes 301. A number of second card holes 602 are opened on one side of the side extrusion frame 6. A number of plastic fasteners 4 are fixedly connected to the other side of the second rubber pad 604. The plastic fasteners 4 are clamped in the second card holes 602. Rubber anti-slip pads 502 are fixedly connected above the connecting plate 5 and at the front and rear of the connecting chute 501. The rubber anti-slip pads 502 cooperate with the extrusion nuts 202.

[0039] In this implementation scheme, through the cooperation of the fixing holes 101 and the fixing mechanism, the device can be fixed inside the inspection equipment. The plastic fasteners 4 are common plastic fasteners. The plastic fasteners 4 are clamped inside the first card holes 301 and the second card holes 602. After the first rubber pad 302 and the second rubber pad 604 are aged and damaged later, the plastic fasteners 4 can be directly buckled out from the first card holes 301 and the second card holes 602, which is convenient for later removal and replacement. The rubber anti-slip pads 502 can increase the friction between the connecting plates 5 and between the connecting plate 5 and the extrusion nuts 202, and increasing the friction further avoids the sliding of the connecting plate 5.

[0040] Embodiment 3

[0041] A limit chute 603 is opened on the upper surface of the side extrusion frame 6. An avoidance hole 601 is opened on the side extrusion frame 6. The avoidance hole 601 cooperates with the connecting plate 5. A limit slider 701 is slidably installed in the limit chute 603. A buckle 7 is fixedly connected above the limit slider 701. A medical fixing belt 8 is arranged above the fixing plate 1. The medical fixing belt 8 cooperates with the buckle 7. A female magic tape 802 is fixedly connected to the center of the upper surface of the medical fixing belt 8. Sub-magic tapes 801 are fixedly connected to positions near the two side edges of the upper surface of the medical fixing belt 8. The sub-magic tapes 801 and the female magic tape 802 cooperate with each other. The whole device is made of non-metallic materials.

[0042] In this implementation scheme, through the sliding cooperation of the limit chute 603 and the limit slider 701, the buckle 7 is slidably installed at the upper end of the side extrusion frame 6. The sliding adjustment of the buckle 7 can drive the movement of the medical fixing belt 8. According to the position of the patient's head, the medical fixing belt 8 can be moved to the position of the patient's forehead. Subsequently, the two ends of the medical fixing belt 8 are folded and the two ends of the medical fixing belt 8 are adhered to the middle position by using the sub-magic tapes 801 and the female magic tape 802, and then the medical fixing belt 8 is used to press down the position of the patient's forehead to further fix the patient's head.

[0043] Working principle and usage process of the present invention: When in use, the patient's head needs to be placed on the fixing plate 1. Subsequently, adjust the positions of the two limiting brackets 3 so that the limiting brackets 3 support the two sides below the patient's head from below. Then, adjust the side pressing frame 6 to clamp at a position above the patient's head. Tighten the pressing nut 202 to fix the positions of the limiting brackets 3 and the side pressing frame 6 by using the connecting plate 5. Finally, adjust the position of the buckle 7 so that the medical fixing belt 8 is at the patient's forehead position. Fold the two ends of the medical fixing belt 8 so that the male magic tape 801 adheres to the female magic tape 802, and then use the medical fixing belt 8 to press down the patient's head to effectively fix the patient's head.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A head positioning device for PET / MR, comprising a fixing plate (1), characterized in that: On the upper surface of the fixed plate (1), threaded holes (102) are symmetrically formed. A threaded head (201) is threadedly installed in the threaded hole (102). The upper end of the threaded head (201) is fixedly connected to a connecting stud (2). An extrusion nut (202) is threadedly installed on the connecting stud (2). On the upper surface of the fixed plate (1), limiting brackets (3) are symmetrically arranged. The inner side of the limiting bracket (3) is in an arc shape, and a first rubber pad (302) is attached to the arc surface. Connecting plates (5) are fixedly connected to the separated surfaces of the two limiting brackets (3). On the upper surface of the fixed plate (1), side extrusion frames (6) are symmetrically arranged. Second rubber pads (604) are attached to the opposite surfaces of the two side extrusion frames (6). Connecting plates (5) are fixedly connected to the separated surfaces. The heights of the connecting plates (5) on the limiting brackets (3) and the side extrusion frames (6) are different. A rubber anti-slip pad (502) is formed in the connecting plate (5). The rubber anti-slip pad (502) cooperates with the connecting stud (2).

2. The head positioning device for PET / MR according to claim 1, wherein: Fixed holes (101) are formed at positions near the four corners inside the fixed plate (1).

3. The head positioning device for PET / MR according to claim 1, characterized in that: A number of first card holes (301) are formed below the limiting bracket (3). A number of plastic fasteners (4) are fixedly connected to the lower surface of the first rubber pad (302). The plastic fasteners (4) are snap-fitted in the first card holes (301).

4. A head positioning device for PET / MR according to claim 1, characterized in that: A number of second card holes (602) are formed on one side of the side extrusion frame (6). A number of plastic fasteners (4) are fixedly connected to the other side of the second rubber pad (604). The plastic fasteners (4) are snap-fitted in the second card holes (602).

5. The head positioning device for PET / MR according to claim 1, characterized in that: Rubber anti-slip pads (502) are fixedly connected above the connecting plate (5) and in front of and behind the connecting chute (501). The rubber anti-slip pads (502) cooperate with the extrusion nut (202).

6. The head positioning device for PET / MR according to claim 1, characterized in that: A limiting chute (603) is formed on the upper surface of the side extrusion frame (6). An avoidance hole (601) is formed in the side extrusion frame (6). The avoidance hole (601) cooperates with the connecting plate (5).

7. A head positioning device for PET / MR according to claim 6, characterized in that: A limiting slider (701) is slidably installed in the limiting chute (603). A buckle (7) is fixedly connected to the upper surface of the limiting slider (701).

8. The head positioning device for PET / MR according to claim 7, characterized in that: A medical fixing band (8) is arranged above the fixed plate (1). The medical fixing band (8) cooperates with the buckle (7).

9. The head positioning device for PET / MR according to claim 8, wherein: A female magic tape (802) is fixedly connected to the center of the upper surface of the medical fixing band (8). Male magic tapes (801) are fixedly connected to positions near the two side edges on the upper surface of the medical fixing band (8). The male magic tapes (801) and the female magic tape (802) cooperate with each other.

10. The head positioning device for PET / MR according to claim 1, characterized in that: The whole device is made of non-metallic material.

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