CN213406064U

CN213406064U - CT imaging device

Info

Publication number: CN213406064U
Application number: CN202020385231.XU
Authority: CN
Inventors: 褚倩; 刘雨晴; 李震; 万琳; 谢庆国
Original assignee: Shenzhen Ruitan Technology Co ltd
Current assignee: Shenzhen Ruitan Technology Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2021-06-11
Anticipated expiration: 2030-03-24

Abstract

The utility model discloses a CT imaging device, which comprises an X-ray generator, a detector, a marker and an image reconstruction unit, wherein the detector and the X-ray generator are arranged oppositely in the horizontal direction, and the detector receives X-rays emitted by the X-ray generator and forms plane projection data; the marker is positioned between the X-ray generator and the detector and is rotated at least three times about a central vertical axis of the marker during patient examination. The utility model discloses can utilize the CT image that the current X-ray equipment was quick and the low-cost acquireed the patient in the hospital, can conveniently when needs, provide enough quantity's replacement CT equipment rapidly and supply medical personnel to use, help a large amount of patients of short-term test.

Description

CT imaging device

Technical Field

The utility model relates to a medical imaging field, more specifically relates to a CT imaging device.

Background

CT is an important scientific support for pneumonia treatment and diagnosis as a mature imaging technology. The understanding and understanding of the lung infection of a patient, and imaging are an important means. However, when the number of CT devices is insufficient during disease screening and treatment, a large number of patients or suspected patients may need to wait in line for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a CT imaging device to solve among the prior art when the CT equipment not enough can not be fast and the low-cost problem that provides sufficient CT equipment.

The utility model provides a CT imaging device, including X ray generator, detector, marker and image reconstruction unit, the detector with X ray generator is at the relative arrangement of horizontal direction, the detector receives the X ray that X ray generator sent and forms plane projection data; the marker is positioned between the X-ray generator and the detector, and the patient rotates around the axis of the marker at least three times during detection; and the image reconstruction carries out CT image reconstruction according to the plurality of groups of plane projection data.

According to an embodiment of the present invention, the X-ray generator and the detector are an X-ray bulb and a flat panel detector of the DR apparatus, respectively.

According to an embodiment of the present invention, the X-ray generator and the detector are an X-ray tube and a detector of an X-ray machine, respectively.

According to an embodiment of the invention, the marker is located near one end of the detector.

According to an embodiment of the present invention, the marker is a graphic mark indicating the standing position, the rotation angle and the rotation direction of the patient.

According to the utility model discloses an embodiment, the marker is the carousel, the patient arranges in when detecting on the carousel, the carousel drives the patient accomplishes rotatoryly.

According to the utility model discloses an embodiment, the carousel is liftable carousel.

According to an embodiment of the invention, the patient rotates with a fixed angle value.

The utility model provides a CT imaging device realizes CT formation of image through utilizing current X-ray equipment in the hospital, can be fast and low-cost acquire patient's CT image, can regard as CT equipment's replacement equipment, can conveniently, provide the class CT equipment of sufficient quantity rapidly when CT equipment is not enough and supply medical personnel to use, help short-term test patient, have positive meaning to the effectual control disease propagation of mankind.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a CT imaging apparatus according to an embodiment of the present invention;

fig. 2 is a marker schematic of a CT imaging apparatus according to an embodiment of the present invention;

fig. 3 is a schematic plan view of a CT imaging apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic displacement diagram of the CT imaging apparatus according to the embodiment of FIG. 3;

fig. 5 is a schematic diagram of patient displacement of a CT imaging apparatus according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific embodiments. It should be understood that the following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.

It will be understood that when an element/feature is referred to as being "disposed on" another element/feature, it can be directly on the other element/feature or intervening elements/features may also be present. When a component/part is referred to as being "connected/coupled" to another component/part, it can be directly connected/coupled to the other component/part or intervening components/parts may also be present. The term "connected/coupled" as used herein may include electrical and/or mechanical physical connections/couplings. The term "comprises/comprising" as used herein refers to the presence of features, steps or components/features, but does not preclude the presence or addition of one or more other features, steps or components/features. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In addition, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and to distinguish similar objects, and there is no order of precedence between them, nor should they be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The utility model provides a CT imaging device, as shown in fig. 1, including detection module 1, mark module 40 and processing module 2, wherein detection module 1 includes X ray generator 10, detector 20 and circuit controller 23, X ray generator 10 is to the direction transmission X ray of detector 20, detector 20 receives the decay information after the X ray passes the object that awaits measuring, circuit controller 23 is connected with detector 20 and image processor 30 respectively and is handled with control detector 20 collection plane projection data and with plane projection data transmission to image processor 30; the marking module 40 is disposed between the X-ray generator 10 and the detector 20; the processing module 2 includes an image processor 30, and the image processor 30 performs CT image reconstruction and display based on the planar projection data.

According to the technical concept of the present invention, the X-ray generator 10 can be an X-ray bulb tube in a DR (digital radiography, abbreviated as DR) device in a hospital radiology department, or an X-ray generator in an X-ray machine in a hospital radiology department, that is, any device capable of generating X-rays can be used; the detector 20 may be a flat panel detector in a DR device of a hospital radiology department, or an X-ray detector in an X-ray machine of a hospital radiology department, that is, any device capable of acquiring a digital signal corresponding to an image in a projection process may be used.

Further, the marking module 40 is preferably close to one side of the detector, and the patient stands at the position of the marking module 40 during the detection, and the organ or the part to be examined by the patient should be located in the irradiation range of the X-ray.

Since the patient needs to rotate around the marking module 40 during the examination, in order to keep the relative positions of the patient, the X-ray generator and the detector unchanged during the rotation of the patient, according to an embodiment of the present invention, as shown in fig. 2, the marking module 40 may be in a form of manual marking or pasting picture, the center O of the marking module 40 is marked as the center of the fixed position, the shape of the marking module 40 is preferably circular, the patient 50 has a footprint mark in the circular shape, the position of the patient 50 can mark the position of the patient in sequence, the direction and the angle r of each rotation of the patient 50 are marked in the marking module 40 in a clockwise or counterclockwise direction, for example, the patient 50 stands on the footprint mark with both feet in the initial standing posture, the position is P1 at this time, when the first time of obtaining the planar projection data, the counterclockwise rotation angle r is P2 at this time, the planar projection data corresponding to the position is obtained, and so on until the patient completes the 360-degree rotation detection.

According to another embodiment of the present invention, as shown in fig. 3, a rotary table 40 is disposed at a fixed position between the X-ray generator 10 and the detector 20, the plane of the rotary table 40 is parallel to the horizontal plane, the patient 50 stands on the rotary table 40 during the detection, and is in the initial standing posture, the patient 50 stands facing the detector 20, the vertical central axis of the patient 50 coincides with the rotation axis of the rotary table 40 when the patient 50 stands, the X-ray 11 emitted from the X-ray generator 10 is received by the detector 20 after passing through the patient 50, and the graphic processor 30 can obtain the initial plane projection data. Then, the patient is moved by an angle by rotating the turntable 40, as shown in fig. 4, the rotation of the patient 50 around the vertical central axis can be realized by the turntable controller 60, the turntable controller 60 and the image processor 30 can be integrated into the processing module 2, and the turntable controller 60 is used for precisely controlling the lifting height and the rotating angle of the lifting turntable 40 and transmitting the height and the angle to the image processor 30.

According to the utility model discloses a further embodiment, as shown in fig. 5, carousel 40 can design for the liftable carousel, the plane at this liftable carousel 40 place is parallel with the horizontal plane, make patient 50 stand on carousel 40 during the detection, patient 50 should make the vertical axis of self and the rotation axis coincidence of carousel when standing, when patient 50 is located the initial gesture of standing (as shown by dotted line in fig. 5), the regional information that testing personnel need detect according to the initial plane projection data screening that acquires, then make the patient rise a height h along the arrow point direction through control liftable carousel 40, thereby make the patient wait to detect the position and be in suitable position. The turntable controller 60 is used for precisely controlling the elevation height and the rotation angle of the elevation turntable 40 and transmitting the elevation height and the rotation angle to the image processor 3.

The utility model discloses when carrying out CT formation of image, can operate according to following step:

step S1: the X-ray generator and the detector are oppositely arranged in the horizontal direction;

step S2: placing the patient between the X-ray generator and the detector;

step S3: acquiring first plane projection data of a patient in an initial standing posture state;

step S4: rotating the patient clockwise or anticlockwise by an angle r around a vertical central axis of the initial standing posture and acquiring plane projection data corresponding to the angle r;

step S5: repeating the above step S4 to obtain at least 3 planar projection data;

step S6: and carrying out image reconstruction according to the at least 3 planar projection data to acquire a CT image.

Specifically, in the above step S2, the patient is preferably located close to the detector side, and the organ or region to be examined by the patient should be located within the irradiation range of the X-ray.

In the above step S3, the initial standing state is a standing state in which the patient is relatively still when the examination is started after the position of the patient is fixed in step S2, and the digital signal obtained by the detector after the X-ray attenuation through the examination portion of the patient, that is, the first planar projection data, is acquired. The turning on of the X-ray generator and the acquisition of the digital signal corresponding to the X-ray by the detector are easily realized by those skilled in the art, and are not described herein again.

In the above step S4, when the first planar projection data is obtained in step S3, the patient needs to be rotated by an angle r relative to each other, and the patient should be rotated according to the following principle: firstly, keeping the distance between the patient and the X-ray generator and the detector unchanged; secondly, make patient rotation angle r under the unchangeable prerequisite of interval the utility model discloses an in the embodiment, the patient is in the gesture of standing usually, can regard as the patient to be in a vertical plane this moment, and the patient's rotation is with the vertical axis direction of patient position as the rotation axis, can regard as each tangent plane of patient in the horizontal plane all along clockwise or anticlockwise rotation, and the angle of patient's rotation at every turn is the fixed value preferably. The planar projection data are acquired once every time the patient rotates an angle r, and all the planar projection data are acquired by the same method, except that the patient positions corresponding to the planar projection data in each time are different.

In step S5, the quality of the finally obtained CT image is higher as the amount of the acquired planar projection data is larger, that is, the angle r of each rotation of the patient is smaller, the more the acquired projection data is, the higher the quality of the reconstructed image is, and the time taken for one detection is also increased accordingly. Preferably, the angle r of each rotation of the patient is 30 degrees or 45 degrees.

In step S6, the CT image obtained by reconstructing the plurality of planar Projection data is the same as a CT image Reconstruction method commonly used in the ART, such as image Reconstruction by an imaging workstation, image processing, image browsing, image data transmission and the like by filtering, region-of-interest analysis and the like, and the image Reconstruction method may be an analytic method or an iterative method, such as direct back Projection (FBP), filtered back Projection (FDK), Feldkamp (FDK) algorithm, Algebraic Reconstruction method (ART), joint Algebraic Reconstruction method (SART) and the like, which will not be described herein again.

Further, according to a preferred embodiment of the present invention, the present invention can be operated according to the following steps: the first step is as follows: selecting an X-ray bulb tube and a detector in DR equipment, and enabling the X-ray bulb tube and the detector to be arranged oppositely in space, wherein the detector is used for receiving X-rays emitted by the X-ray bulb tube; secondly, calibrating a fixed position between the X-ray bulb tube and the detector, and enabling the patient to stand at the fixed position; thirdly, standing the patient still, adjusting the positions of the X-ray bulb tube and the detector to cover the part of the patient to be detected, and starting the DR equipment to acquire plane projection data in the initial state; fourthly, enabling the patient to rotate clockwise by 30 degrees around the fixed position in the horizontal plane in sequence, and acquiring plane projection data corresponding to each angle; fifthly, repeating the fourth step until the patient completes 360-degree rotation; and sixthly, reconstructing a CT image according to the plurality of planar projection data.

In order to keep the relative positions of the patient, the X-ray generator and the detector unchanged during the rotation of the patient, the step S4 can be realized by the following method:

the first rotation method: a rotary table is arranged at a certain fixed position between an X-ray generator and a detector, the plane where the rotary table is located is parallel to the horizontal plane, a patient stands on the rotary table during detection, the vertical central axis of the patient should coincide with the rotating shaft of the rotary table when the patient stands, and the rotation of the rotary table can be realized through manual calibration or machine control rotation.

The second rotation method: a lifting turntable is arranged at a certain fixed position between an X-ray generator and a detector, the plane where the lifting turntable is located is parallel to the horizontal plane, a patient stands on the turntable during detection, the vertical central axis of the patient should coincide with the rotating shaft of the turntable when the patient stands, when the patient is located in an initial standing posture, a detector screens regional information needing to be detected according to the obtained initial plane projection data, then the position to be detected of the patient is located at a proper position by controlling the height of the lifting turntable, and the rotation of the turntable is the same as that in the first rotation method.

The third rotation method: as shown in fig. 2, a marker is fixed at a fixed position between the X-ray generator 10 and the detector 20, the marker may be in a form of manual marking or stickup, a center O of the marker coincides with a center of the fixed position, the marker is preferably in a circular shape, a footprint mark is provided in the circular shape, the patient can mark his or her own position in turn, the marker marks the direction and the angle r of each rotation of the patient in a clockwise or counterclockwise direction, for example, the patient stands on the footprint mark with both feet in an initial standing posture, the position is P1, when the first time of planar projection data acquisition is performed, the angle r is rotated counterclockwise, the position is P2, planar projection data corresponding to the position is acquired, and so on, until the patient completes 360 ° rotation detection.

According to the above technical scheme, the utility model discloses a CT formation of image method and device can utilize current ray generator and detector, for example DR equipment, and quick and low-cost CT transformation of carrying on acquires patient's computer tomography image, satisfies interim extensive CT equipment user demand. The utility model provides a CT imaging device still has characteristics such as the equipment is portable, relevant parameter is easily adjusted. For example in the special period, no matter be tertiary hospital or local small-size hospital, the DR equipment quantity of configuration often is several times of CT equipment quantity, and in the high stage of sending out of disease, a large amount of DR equipment are in idle state, utilize the utility model discloses a method and equipment can be quick carry out the equipment transformation, help suspected patient and accomplish CT image detection, can provide help for the early quick diagnosis in disease, avoid the mild case to delay and become severe case, have positive meaning to the effective control disease propagation of mankind.

What has been described above is only the preferred embodiment of the present invention, not for limiting the scope of the present invention, but various changes can be made to the above-mentioned embodiment of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The present invention is not described in detail in the conventional technical content.

Claims

1. A CT imaging apparatus, comprising:

an X-ray generator;

the detector is arranged opposite to the X-ray generator in the horizontal direction, and receives the X-rays emitted by the X-ray generator and forms planar projection data;

a marker positioned between the X-ray generator and the detector, the patient being examined with at least three rotations about a central vertical axis of the marker.

2. The CT imaging apparatus of claim 1, wherein the X-ray generator and the detector are an X-ray tube and a flat panel detector, respectively, of a DR device.

3. The CT imaging apparatus of claim 1, wherein the X-ray generator and the detector are an X-ray tube and a detector, respectively, of an X-ray machine.

4. The CT imaging modality of claim 1, wherein the marker is located near an end of the detector.

5. The CT imaging modality of claim 1, wherein the markers are graphical markers that indicate the patient's standing position, rotation angle and rotation direction.

6. The CT imaging modality of claim 1, wherein the marker is a turntable on which the patient is placed during the examination, the turntable carrying the patient through rotation.

7. The CT imaging apparatus of claim 6, further comprising a turntable controller, the turntable controller being connected to the turntable to control the turntable to rotate.

8. The CT imaging device of claim 6, wherein the turntable is a liftable turntable.

9. The CT imaging device of claim 8, wherein the patient rotates at a fixed angular value.

10. The CT imaging apparatus according to claim 1, further comprising an image reconstruction unit that performs CT image reconstruction from the plurality of sets of planar projection data.