CN111671453A - In-situ CT device in radiotherapy - Google Patents

Abstract

The invention discloses an in-situ CT device in radiotherapy, which comprises a base, wherein a support column is fixed on the base, a lower bed plate is fixed at the upper end of the support column, an upper bed plate slides on the lower bed plate, a CT machine is fixed on one end of the base, and a fixing mechanism for fixing the head is arranged at one end, close to the CT machine, of the upper bed plate. According to the invention, no additional medical personnel is required to operate, the patient can operate the device, when the head of the patient is placed on the headrest, the headrest moves downwards to drive the V-shaped plate to move downwards, and the clamping plates on the two sides of the headrest move relatively, so that the head of the patient is fixed, the left and right shaking of the head of the patient is limited, and the CT detection efficiency is further improved.

Description

In-situ CT device in radiotherapy

Technical Field

The invention relates to the technical field of medical CT equipment, in particular to an in-situ CT device in radiotherapy.

Background

CT is the acronym for "computed tomography" or "computed tomography". In CT, a certain part of human body is scanned by X-ray beam according to a certain thickness of layer, when the X-ray is radiated to human tissue, part of ray is absorbed by tissue, and part of ray is received by organ to be detected through human body to generate signal. Because the density of various tissues of the human body is different and the penetration capacity of X-rays is different, the rays received by the detector have differences. The received differential ray signal is converted into digital information, processed by a computer and output to a display screen to display an image, which is called a cross-sectional image. CT is characterized by simple operation, no pain for patients, high density and resolution, capability of observing very small lesions in human body and directly displaying organs and lesions which cannot be displayed by X-ray plain film, and very sensitive and reliable detection of lesions and determination of relative spatial position, size and number of lesions, and special value.

The CT machine is classified into a skull CT machine and a whole body CT machine according to its application range. When a skull CT machine performs CT scanning, it is necessary to keep the head of a subject as still as possible in order to obtain a clear CT image. The movement of the examined region may cause motion artifacts, affecting the sharpness of the image and the examination effect. For some patients with poor fit, the examined part can be fixed in a proper constraint mode to reduce the movement artifact in the CT scanning process. For this purpose, special restraint devices are required to secure the patient's head.

For example, chinese utility model patent publication No. CN205625957U discloses a CT scanning bed with adjustable head fixing device, mainly relating to the CT technical field. The multifunctional bed comprises a bed body, wherein a head positioning mechanism is arranged on the bed body and comprises a headstock and a shoulder frame, an adjusting rod is arranged on the shoulder frame and is in sliding connection with the two sides of the headstock, two opposite clamping cushions are arranged in the headstock and are in sliding connection with the headstock and provided with tension springs, and a pull rod is arranged on the outer sides of the clamping cushions.

The CT scanning bed with the adjustable head fixing device has the following defects: because the manual operation is adopted, the adjustment can only be carried out by medical staff during adjustment, but the patient can not operate the adjustment by himself, the labor expenditure is increased, and the efficiency is reduced.

For another example, chinese utility model patent publication No. CN207886214U discloses a head CT examination fixing device, including the horizontal plate, first arc head backplate, second arc head backplate, the top of horizontal plate is located the right side of second arc head backplate and is fixed with vertical board, be fixed with a horizontal guide on the vertical board, the end of horizontal guide is fixed with driving motor, the below that the top of horizontal plate is located driving motor is fixed with a horizontal plate, be provided with the tooth's socket on the horizontal plate, be connected with the drive gear with tooth's socket meshing through the connecting axle on driving motor's the output shaft, be fixed with the connecting axle of being connected with second arc head backplate on the driving motor. The beneficial effects are as follows: convenient to use, degree of automation is high.

The head CT examination fixing device has the following defects: although the automatic operation is adopted, the structure is complex and tedious, the cost is high, and a certain failure rate exists.

In summary, how to design a head fixing mechanism for CT scanning, which is capable of avoiding increasing the operation of medical staff, has a simple structure, is practical and convenient, is a problem that needs to be solved at present.

Disclosure of Invention

The invention aims to provide an in-situ CT device in radiotherapy, which has the advantages of simple structure, convenience in use and low failure rate and solves the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an in situ CT device in radiation therapy, includes the base, the higher authority of base is fixed with the support column, the upper end of support column is fixed with down the bed board, the higher authority of bed board slides down has last bed board, the higher authority of base one end is fixed with the CT machine, the one end that goes up the bed board and be close to the CT machine is provided with the fixed establishment who is used for fixed head.

Preferably, the fixing mechanism comprises a U-shaped frame, the U-shaped frame is fixed below one end, close to the CT machine, of the upper bed plate, a V-shaped plate slides on the inner side of the U-shaped frame, a fixing plate is fixed on the upper surface of the V-shaped plate, and a headrest is fixed on the upper surface of the fixing plate.

Preferably, two guide grooves are formed in the surface of the V-shaped plate, the two guide grooves are axisymmetric with the vertical central line of the V-shaped plate, guide wheels roll in the two guide grooves, first telescopic rods are fixed at the front ends of the two guide wheels, clamping plates are arranged at the upper ends of the two first telescopic rods, and the two clamping plates are symmetrically arranged on two sides of the headrest.

Preferably, the first telescopic rod comprises a first fixed cylinder, the rear part of the lower end of the first fixed cylinder is fixed with the front end of the guide wheel, a first support rod slides in the inner cavity of the first fixed cylinder, and the first support rod penetrates out of the upper end of the first fixed cylinder and is fixed with the outer side of the clamping plate.

Preferably, the front of U-shaped frame is provided with the second telescopic link, the second telescopic link includes the fixed section of thick bamboo of second, the fixed section of thick bamboo of second is fixed the inside in front of the U-shaped frame, the inner wall at the fixed section of thick bamboo both ends of second has all slided the second bracing piece, two the one end that the fixed section of thick bamboo of second was worn out to the second bracing piece is respectively with two the preceding fixed of first fixed section of thick bamboo lower extreme, the inner wall in the middle of the fixed section of thick bamboo of second is fixed with first spring, the both ends of first spring respectively with two the inner wall of second bracing piece is fixed.

Preferably, a second spring is fixed on the lower surface of the middle of the V-shaped plate, and the lower end of the second spring is fixed with the middle of the inner side of the U-shaped frame.

Preferably, a guide rod is fixed below the V-shaped plate, a guide sleeve is fixed on the side face of the U-shaped frame, and a limiting block is fixed at the lower end of the guide rod, which penetrates out of the guide sleeve.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, no additional medical personnel is required to operate, the patient can operate the device, when the head of the patient is placed on the headrest, the headrest moves downwards to drive the V-shaped plate to move downwards, and the clamping plates on the two sides of the headrest move relatively, so that the head of the patient is fixed, the left and right shaking of the head of the patient is limited, and the CT detection efficiency is further improved.

2. The invention has simple structure, can fix the head by utilizing the dead weight of the head of the patient, has no complex adjusting mechanism (manual or automatic adjusting mechanism), thus having stronger reliability, better portability and low failure rate.

Drawings

FIG. 1 is a schematic structural diagram of a perspective view of a CT machine according to the present invention;

FIG. 2 is a schematic structural view of a fixed headrest and a fixed plate according to the present invention;

FIG. 3 is a schematic structural view of a front view of an upper bed plate and a lower bed plate of the present invention;

FIG. 4 is a schematic structural view taken along the line A-A in FIG. 3;

FIG. 5 is a schematic perspective view of the first and second extendable rods of the present invention;

FIG. 6 is a schematic structural view of a guide wheel of the present invention rolling along a guide groove;

FIG. 7 is a schematic structural diagram of a top view of a second fixed cylinder according to the present invention;

FIG. 8 is a schematic structural view taken along section B-B of FIG. 7 in accordance with the present invention;

FIG. 9 is a schematic structural view of a perspective view of the guide bar of the present invention after it has passed through the guide sleeve;

FIG. 10 is a schematic front view of the fixation head of the present invention;

fig. 11 is a schematic structural view of a rear side view of the fixation head of the present invention.

In the figure: 1-base, 2-support column, 3-lower bed plate, 4-upper bed plate, 5-CT machine, 6-fixing mechanism, 7-U-shaped frame, 8-V-shaped plate, 9-fixing plate, 10-headrest, 11-guide groove, 12-guide wheel, 13-first telescopic rod, 14-clamping plate, 15-first fixing cylinder, 16-first support rod, 17-second telescopic rod, 18-second fixing cylinder, 19-second support rod, 20-first spring, 21-second spring, 22-guide rod, 23-guide sleeve, 24-limiting block, 25-lead screw, 26-lead screw fixing seat, 27-gear structure, 28-driving motor, 29-sliding groove and 30-sliding block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 11, the present invention provides a technical solution: the utility model provides an in situ CT device in radiation therapy, includes base 1 for support the structure of fixing on it, and base 1 is the bigger flat plate structure of an area ratio, is favorable to improving the stability of placing, the higher authority of base 1 is fixed with support column 2, the upper end of support column 2 is fixed with down bed board 3, support column 2 plays the connection base 1 with the effect of bed board 3 down, it has last bed board 4 to slide above the bed board 3 down, it is provided with the cushion to go up the higher authority of bed board 4 for patient lies on it more comfortable, the higher authority of 1 one end of base is fixed with CT machine 5.

Further, the sliding structure of the lower bed plate 3 and the upper bed plate 4 may be, but is not limited to, a sliding block 30, a sliding groove 29, a lead screw 25, a lead screw fixing seat 26, a gear structure 27 and a driving motor 28, the sliding block 30 is fixed below the lower bed plate 3, the sliding groove 29 is disposed above the upper bed plate 4, the sliding block 30 and the sliding groove 29 form a sliding connection relationship, the lead screw 25 rotates in a groove formed in the middle of the lower bed plate 3, the gear structure 27 is fixed at one end of the lower bed plate 3 away from the CT machine 5 and is in transmission connection with the lead screw 25, the driving motor 28 is fixed at the inner side of the lower end of the gear structure 27, after the driving motor 28 is started, the lead screw 25 is driven to rotate forward when rotating forward, so that the upper bed plate 4 slides toward the CT machine 5, the lead screw 25 is driven to rotate backward when rotating backward, so that the upper bed plate 4 slides toward the gear, thereby delivering the patient into the inside of the CT machine 5 to the inspection head.

Further, the screw rod 25 can rotate in a groove formed in the middle of the lower bed plate 3 through a bearing seat.

One end of the upper bed plate 4 close to the CT machine 5 is provided with a fixing mechanism 6 for fixing the head. Fixing mechanism 6 includes U-shaped frame 7, U-shaped frame 7 is fixed it is below the one end that goes up bed board 4 and be close to CT machine 5, the inboard sliding of U-shaped frame 7 has V-arrangement board 8, the higher authority of V-arrangement board 8 is fixed with fixed plate 9, the higher authority of fixed plate 9 is fixed with headrest 10, the concave beam limit is protruding slightly in the middle of headrest 10 for adapt to patient's head shape.

Further, the headrest 10 may be made of soft materials such as sponge, silica gel, and foam, so as to improve the comfort of the headrest 10.

The surface of the V-shaped plate 8 is provided with two guide grooves 11, the two guide grooves 11 are axisymmetrical with the vertical center line of the V-shaped plate 8, guide wheels 12 roll in the two guide grooves 11, the front ends of the two guide wheels 12 are fixed with first telescopic rods 13, the upper ends of the two first telescopic rods 13 are provided with clamping plates 14, the two clamping plates 14 are symmetrically arranged at the two sides of the headrest 10, the guide grooves 11 are matched with the guide wheels 12 in a rolling manner, so that the two clamping plates 14 can be translated more flexibly and have small resistance, wherein the first telescopic rods 13 can adjust the height of the clamping plates 14, so that when the V-shaped plate 8 moves downwards to a lower position, the clamping plates 14 just aim at and clamp the side surface of the head of a patient, and when the head of the patient is clamped, the head of the patient cannot rotate left and right, thereby improving the accuracy of CT detection, it is also convenient for the clamp plate 14 to release the patient's head after the test is completed, and the release is effected by the patient moving his or her head up from the head rest 10.

Generally speaking, the difference of the head weight of different patients is smaller, but the difference is not excluded to be large, so the adjustment function of the first telescopic rod 13 is exerted, when the head of the patient with heavier head is placed on the headrest 10, the V-shaped plate 8 sinks deeper, then the height of the head becomes lower, and the height of the splint 14 needs to be adjusted, and of course, the distance between the two splints 14 becomes closer, so in this embodiment, the connection part of the first telescopic rod 13, the guide wheel 12 and the second telescopic rod 17 is tightly connected by a bolt, the connection part of the first telescopic rod 13 and the splint 14 is tightly connected by a bolt, so the distance between the two splints 14 can be adjusted to be larger by rotating the first telescopic rod 13 outwards, so as to increase the versatility of the mechanism, the adjustable head is suitable for more patients with different head weights and sizes, and when the adjustment is carried out, the patients can operate by themselves without adding extra medical care personnel for special adjustment.

Further, the shape of the splint 14 can be set to be an arc shape which is adapted to the head of the patient, and the material of the splint 14 can be soft materials such as rubber and foam, so that the comfort of the splint 14 for clamping the head is improved.

The first telescopic rod 13 includes a first fixed cylinder 15, a rear surface of a lower end of the first fixed cylinder 15 is fixed to a front end of the guide wheel 12, a first support rod 16 slides in an inner cavity of the first fixed cylinder 15, the first support rod 16 penetrates through an upper end of the first fixed cylinder 15 and is fixed to an outer side of the clamping plate 14, the first fixed cylinder 15 is tightly sleeved with the first support rod 16, generally speaking, after adjustment, except for non-external force, the height of the clamping plate 14 can be maintained (limited), so that the height of the clamping plate 14 can be easily adjusted, and of course, some limiting structures may be added to limit a position of the first support rod 16 in the first fixed cylinder 15, such as a screw, a handle, and the like.

A second telescopic rod 17 is arranged in front of the U-shaped frame 7, and the second telescopic rod 17 can be telescopic, so that the arrangement of the second telescopic rod 17 enables the two clamping plates 14 to only do opposite or back-to-back translational linear motion, and the motion trail of the clamping plates 14 is limited.

The second telescopic link 17 includes the fixed section of thick bamboo 18 of second, the fixed section of thick bamboo 18 of second is fixed the inside in front of the U-shaped frame 7, the inner wall at the fixed section of thick bamboo 18 both ends of second has all slided second bracing piece 19, two the one end that the fixed section of thick bamboo 18 of second was worn out to second bracing piece 19 respectively with two the preceding fixed of first fixed section of thick bamboo 15 lower extreme, the inner wall in the middle of the fixed section of thick bamboo 18 of second is fixed with first spring 20, the both ends of first spring 20 respectively with two the inner wall of second bracing piece 19 is fixed. When the head of a patient is rested on the headrest 10, the V-shaped plate 8 moves downwards vertically, the two splints 14 roll along the guide grooves 11 through the guide wheels 12 and move relatively closer and closer until the splints 14 clamp the head of the patient, and when the head of the patient is removed from the headrest 10, the first spring 20 provides an elastic force to urge the V-shaped plate 8 to move upwards for resetting.

A second spring 21 is fixed below the middle of the V-shaped plate 8, the lower end of the second spring 21 is fixed with the middle of the inner side of the U-shaped frame 7, and the second spring 21 provides an elastic force to promote the V-shaped plate 8 to move upwards and return further more sensitively.

A guide rod 22 is fixed below the V-shaped plate 8, a guide sleeve 23 is fixed on the side face of the U-shaped frame 7, the guide rod 22 penetrates out of a limiting block 24 fixed at the lower end of the guide sleeve 23, and the guide rod 22 is matched with the guide sleeve 23, so that the V-shaped plate 8 can only move vertically, and the moving stability of the V-shaped plate 8 is improved.

In addition, the fixing mechanism 6 of the present invention can be made of plastic or other materials that do not affect the normal use of the CT machine 5.

The working principle is as follows: when the in-situ CT device in the radiotherapy is used, a patient firstly lies on the upper bed plate 4, then the head of the patient is rested on the headrest 10, the V-shaped plate 8 vertically moves downwards, the guide wheel 12 rolls along the guide groove 11, the two first telescopic rods 13 are drawn close to each other, the second telescopic rod 17 contracts, the first spring 20 and the second spring 21 are both compressed, then the head of the patient is clamped by the clamping plates 14 from two sides, the head of the patient cannot swing left and right, then the driving motor 28 drives the screw rod 25 to rotate in the same direction, the upper bed plate 4 moves to the inner side of the CT machine 5, the CT machine 5 scans the head of the patient, after the scanning is finished, the upper bed plate 4 returns to reset, the head of the patient is lifted upwards, the clamping plates 14 are far away from the head, and the patient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. An in-situ CT apparatus in radiotherapy, comprising a base (1), characterized in that: the higher authority of base (1) is fixed with support column (2), the upper end of support column (2) is fixed with down bed board (3), bed board (4) have been slided to the higher authority of bed board (3) down, the higher authority of base (1) one end is fixed with CT machine (5), the one end that goes up bed board (4) and be close to CT machine (5) is provided with fixed establishment (6) that are used for fixed head.

2. The in situ CT apparatus for radiation therapy as claimed in claim 1, wherein: fixed establishment (6) are including U-shaped frame (7), U-shaped frame (7) are fixed go up bed board (4) and be close to below the one end of CT machine (5), the inboard sliding of U-shaped frame (7) has V-arrangement board (8), the higher authority of V-arrangement board (8) is fixed with fixed plate (9), the higher authority of fixed plate (9) is fixed with headrest (10).

3. The in situ CT apparatus for radiation therapy as claimed in claim 2, wherein: two guide ways (11) have been seted up on the surface of V shaped plate (8), two guide ways (11) use the vertical central line of V shaped plate (8) is axisymmetric, two all roll in guide ways (11) and have leading wheel (12), two the front end of leading wheel (12) all is fixed with first telescopic link (13), two the upper end of first telescopic link (13) all is provided with splint (14), two splint (14) symmetrical arrangement is in the both sides of headrest (10).

4. The in situ CT apparatus of claim 3, wherein: first telescopic link (13) include a fixed section of thick bamboo (15), the back of a fixed section of thick bamboo (15) lower extreme with the front end of leading wheel (12) is fixed, it has first bracing piece (16) to slide in the inner chamber of a fixed section of thick bamboo (15), first bracing piece (16) are worn out the upper end of a fixed section of thick bamboo (15) with the outside of splint (14) is fixed.

5. The in situ CT apparatus of claim 4, wherein: the front of U-shaped frame (7) is provided with second telescopic link (17), second telescopic link (17) include the fixed section of thick bamboo of second (18), the fixed section of thick bamboo of second (18) is fixed the inside in front of U-shaped frame (7), the inner wall at the fixed section of thick bamboo of second (18) both ends has all slided second bracing piece (19), two the one end that the fixed section of thick bamboo of second (18) was worn out in second bracing piece (19) is respectively with two the preceding fixed of first fixed section of thick bamboo (15) lower extreme, the inner wall in the middle of the fixed section of thick bamboo of second (18) is fixed with first spring (20), the both ends of first spring (20) respectively with two the inner wall of second bracing piece (19) is fixed.

6. The in situ CT apparatus for radiation therapy as claimed in claim 2, wherein: and a second spring (21) is fixed below the middle of the V-shaped plate (8), and the lower end of the second spring (21) is fixed with the middle of the inner side of the U-shaped frame (7).

7. The in situ CT apparatus of claim 6, wherein: a guide rod (22) is fixed below the V-shaped plate (8), a guide sleeve (23) is fixed on the side face of the U-shaped frame (7), and a limiting block (24) is fixed at the lower end of the guide sleeve (23) through which the guide rod (22) penetrates.

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