CN117618001A - Dynamic digital X-ray photography system and method - Google Patents

Abstract

The invention discloses a dynamic digital X-ray photographing system and a method, wherein the dynamic digital X-ray photographing system comprises a photographing bed, the input end of the photographing bed is electrically connected with a high-voltage generator, the output end of the photographing bed is electrically connected with an image workstation, two-way signals of the image workstation are connected with image processing software, the photographing bed comprises an X-ray tube, a controller and a dual-energy photographing detector, the controller is electrically connected with the X-ray tube, the input end of the X-ray tube is electrically connected with the output end of the high-voltage generator, and the output end of the dual-energy photographing detector is electrically connected with the input end of the image workstation. The invention has the advantages of dynamic continuous exposure dual-energy photography and subtraction, and solves the problems that the dynamic continuous exposure dual-energy photography is inconvenient to carry out, the intermittent and judgment of the joint movement track and movement time of a inspector are affected and the inspection difficulty is increased in the use process of the traditional digital X-ray photography system.

Description

Dynamic digital X-ray photography system and method

Technical Field

The invention relates to the technical field of medical images, in particular to a dynamic digital X-ray photography system and a dynamic digital X-ray photography method.

Background

The dynamic digital X-ray photography system is a system for dynamically shooting an inspector, two main current dual-energy imaging modes are two, namely a double exposure method, wherein the double exposure method is a method for respectively reconstructing soft tissue density images, bone density images and common chest radiography by performing independent exposure on an object to be shot twice by using different X-ray output energy (kVp) to obtain two images or data and performing image subtraction or data separation and integration on the two images or data. The other is one-time exposure double-energy photography, only one-time exposure is needed, and two images with different energies are obtained by energy separation of X photons remained after passing through an exposed object during image acquisition.

In the using process of the existing digital X-ray photographing system, dynamic continuous exposure dual-energy photographing is inconvenient, the intermittent and judgment of the joint movement track and movement time of a inspector by a doctor is affected, and the difficulty of inspection is increased.

Disclosure of Invention

The invention aims to provide a dynamic digital X-ray photography system and a dynamic digital X-ray photography method, which have the advantages of dynamic continuous exposure dual-energy photography and subtraction, and solve the problems that the traditional digital X-ray photography system is inconvenient to carry out dynamic continuous exposure dual-energy photography in the use process, the intermittent and judgment of the joint movement track and movement time of an inspector by a doctor are affected, and the inspection difficulty is increased.

In order to achieve the above purpose, the present invention provides the following technical solutions: the dynamic digital X-ray photography system comprises a photography bed, wherein the input end of the photography bed is electrically connected with a high-voltage generator, the output end of the photography bed is electrically connected with an image workstation, and the bidirectional signal of the image workstation is connected with image processing software.

As a preferable mode of the dynamic digital X-ray photography system of the present invention, the photography bed comprises an X-ray tube, a controller and a dual-energy photography detector, wherein the controller is electrically connected with the X-ray tube, the input end of the X-ray tube is electrically connected with the output end of the high-voltage generator, and the output end of the dual-energy photography detector is electrically connected with the input end of the image workstation.

Preferably, in the dynamic digital radiography system of the present invention, the image workstation is electrically connected with a perspective control pedal and a photographic exposure hand brake, respectively.

As a dynamic digital radiography method of the present invention, comprising the steps of:

1) DRCF photography, which realizes continuous perspective imaging by controlling the time and intensity of X-ray beam release;

2) The joint moves, when shooting the inspector, the inspector moves the joint to obtain a moving image of the inspector;

3) High-speed sequence shooting, when the joint motion is carried out, the high-speed sequence shooting function of a shooting system is utilized to realize the acquisition of images in the joint motion, and continuous joint motion images are obtained;

4) Two images are obtained by shooting each frame through a dual-energy shooting detector;

5) The two images are a high-energy dynamic image and a low-energy dynamic image;

6) Using image subtraction to separate bone image data from the high energy image and soft tissue image data from the low energy image data;

7) Generating a dynamic bone motion image and a dynamic muscle motion image using the obtained bone image data and soft tissue image data;

8) Dynamic bone motion images and dynamic muscle motion images are used to make clinical decisions for the inspector.

In the dynamic digital radiography method according to the present invention, the 3) preferably uses a high-power 80KW and a high-speed pulse radiation of 10 frames per second to act on the dual-energy radiography detector when performing high-speed serial radiography.

As a dynamic digital radiography method of the present invention, preferably, the dual-energy radiography detector in the 4) is internally provided with two photosensitive layers and a control unit.

Preferably, as a dynamic digital radiography method of the present invention, the step of using image subtraction in said 6) is as follows,

firstly, subtracting low-energy image data from high-energy image data through subtraction operation, and restoring bone data separated by the high-energy image into sequence data to realize dynamic bone image;

the high-energy image data is subtracted from the low-energy image data by subtraction, and the soft tissue data separated by the low-energy image is remained to restore the sequence data, thereby realizing a dynamic soft tissue image.

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

1. the invention can obtain high-energy image and low-energy image simultaneously by using the dynamic dual-energy photographic detector, is convenient for obtaining subsequent bone image data and soft tissue image data, can provide better distinction between bones and soft tissues, and improves the resolution of internal structures, thereby being very helpful for diagnosing and evaluating pathological changes, injuries, abnormal conditions and the like.

2. The invention can rapidly obtain dynamic skeleton images and dynamic soft tissue images by setting image subtraction operation, thereby facilitating the doctor to check whether the images, the time interval of the joint movement and the movement track are normal or not during the joint movement.

Drawings

FIG. 1 is a schematic diagram of a photography method according to the present invention;

FIG. 2 is a schematic diagram of a camera system according to the present invention;

FIG. 3 is a schematic view of the camera bed of the present invention.

Detailed Description

Example 1

Referring to fig. 2-3, a dynamic digital X-ray photography system includes a camera bed, wherein an input end of the camera bed is electrically connected with a high voltage generator, an output end of the camera bed is electrically connected with an image workstation, and two-way signals of the image workstation are connected with image processing software;

further, the photographing bed comprises an x-ray tube, a controller and a dual-energy photographing detector, wherein the controller is electrically connected with the x-ray tube, the input end of the x-ray tube is electrically connected with the output end of the high-voltage generator, and the output end of the dual-energy photographing detector is electrically connected with the input end of the image workstation;

further, the image workstation is respectively and electrically connected with a perspective control pedal and a photographic exposure hand brake;

further, the image workstation includes a host computer and a display.

The equipment is powered on a power switch, three-phase 380V alternating voltage is changed into 540V direct voltage after being rectified and filtered by a filter, an alternating current contactor and a high-frequency high-voltage generator, the 540V direct voltage is added to an inverter, the inverter inverts the 540V direct voltage into high-frequency alternating voltage, the high-frequency alternating voltage is changed into 40 kV-150 kV direct voltage by the high-voltage generator, and the direct voltage is loaded onto an X-ray tube, so that the X-ray tube generates X-rays;

the controller controls the voltage of the X-ray tube, and adjusts the filament current through the filament heating unit to control the tube current;

each operation and control mode can be selected through the selection and setting conditions of the image acquisition workstation, the image acquisition workstation transmits instructions to the central controller of the generator host through a communication line, the central controller unit controls the output of X-ray dose according to the input instructions, and the shooting conditions are set on the image acquisition workstation to control the radiation dose of the X-rays;

the focus part of the inspector is in the irradiation range of X-rays through the operation of the perspective diagnosis bed, and perspective and photographing are realized at the same time.

The working steps are as follows:

firstly, turning on a high-voltage generator, starting an X-ray source, and providing a required high voltage for the X-ray tube by the high-voltage generator;

setting parameters of the X-ray source, such as current and exposure time, etc., by a controller;

placing the inspected object on the photographing bed to ensure the correct position and posture;

an operator can use a photographic exposure hand brake to trigger the exposure of X-rays to start a shooting process;

after passing through the checked object, the X-rays are recorded by a dual-energy photographic detector and converted into electric signals;

then, the electric signals are transmitted to an image workstation and image processing software through cables;

the image processing software decodes the electric signals, and performs image reconstruction to generate perspective images;

an operator observes and analyzes the X-ray fluoroscopic image through a display screen on the image workstation to perform diagnosis or examination;

furthermore, a perspective control foot pedal is provided for the operator to control the exposure or stop of X-rays when required.

Example 2

Referring to fig. 1, a method of dynamic digital radiography system includes the steps of:

1) DRCF photography achieves continuous fluoroscopic imaging by controlling the time and intensity of X-ray beam release.

2) When the examiner photographs the subject, the examiner moves the joints to acquire a moving image of the examiner.

3) And when the high-speed sequential shooting is carried out, high-speed pulse rays with high power of 80KW and 10 frames per second are used for acting on the dual-energy shooting detector.

4) Two images are obtained by shooting each frame through a dual-energy shooting detector, and two photosensitive layers and a control unit are arranged in the dual-energy shooting detector.

5) The two images obtained are a high-energy dynamic image and a low-energy dynamic image.

6) Using image subtraction to separate bone image data from the high energy image and soft tissue image data from the low energy image data;

the image subtraction operation is performed as follows,

firstly, subtracting low-energy image data from high-energy image data through subtraction operation, and restoring bone data separated by the high-energy image into sequence data to realize dynamic bone image;

the high-energy image data is subtracted from the low-energy image data by subtraction, and the soft tissue data separated by the low-energy image is remained to restore the sequence data, thereby realizing a dynamic soft tissue image.

7) Dynamic bone motion images and dynamic muscle motion images are generated using the obtained bone image data and soft tissue image data.

A method for continuously imaging an examination part, wherein 10 frames are imaged every second, 2 second images are acquired, and 40 frames (20 frames of high-energy images and 20 frames of low-energy images) are obtained in total;

in the series of images, the high-energy image and the low-energy image which are acquired simultaneously are taken, and the digital matrixes of the two frames of images are subjected to digital subtraction processing by a computer, so that the numbers representing bones in the two digital matrixes are cancelled, and the numbers representing soft tissues are not cancelled. Thus, the digital matrix after the computer subtraction processing is converted into an image by a digital/analog converter, and no bone exists, and only soft tissue images exist;

or the digital matrix of the two frames of images is subjected to digital subtraction processing by a computer, so that the numbers representing soft tissues in the two digital matrices are cancelled, and the numbers representing bones are not cancelled, thus, the digital matrix subjected to the digital subtraction processing by the computer is converted into images by a digital/analog converter, no soft tissues exist, only bone images achieve the purpose of subtraction, and the two frames of images are called subtraction pairs, are obtained by double-energy images and are continuously executed, so the dynamic double-energy subtraction method is called.

8) Dynamic bone motion images and dynamic muscle motion images are used to make clinical decisions for the inspector.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (8)

1. A dynamic digital radiography system comprising a radiography bed, characterized by: the input end of the photographing bed is electrically connected with a high-voltage generator, the output end of the photographing bed is electrically connected with an image workstation, and the two-way signal of the image workstation is connected with image processing software.

2. A dynamic digital radiography system as in claim 1 wherein: the photographing bed comprises an x-ray tube, a controller and a dual-energy photographing detector, wherein the controller is electrically connected with the x-ray tube, the input end of the x-ray tube is electrically connected with the output end of the high-voltage generator, and the output end of the dual-energy photographing detector is electrically connected with the input end of the image workstation.

3. A dynamic digital radiography system as in claim 1 wherein: the image workstation is respectively and electrically connected with a perspective control pedal and a photographic exposure hand brake.

4. A dynamic digital radiography system as in claim 1 wherein: the image workstation includes a computer host and a display.

5. A method of dynamic digital radiography system according to any one of claims 1-4, comprising the steps of:

1) DRCF photography, which realizes continuous perspective imaging by controlling the time and intensity of X-ray beam release;

2) The joint moves, when shooting the inspector, the inspector moves the joint to obtain a moving image of the inspector;

3) High-speed sequence shooting, when the joint motion is carried out, the high-speed sequence shooting function of a shooting system is utilized to realize the acquisition of images in the joint motion, and continuous joint motion images are obtained;

4) Two images are obtained by shooting each frame through a dual-energy shooting detector;

5) The two images are a high-energy dynamic image and a low-energy dynamic image;

6) Using image subtraction to separate bone image data from the high energy image and soft tissue image data from the low energy image data;

7) Generating a dynamic bone motion image and a dynamic muscle motion image using the obtained bone image data and soft tissue image data;

8) Dynamic bone motion images and dynamic muscle motion images are used to make clinical decisions for the inspector.

6. A dynamic digital radiography method as in claim 1 wherein: in 3), high-power 80KW high-speed pulse rays with 10 frames per second are used to act on the dual-energy photographing detector when high-speed sequential photographing is carried out.

7. A dynamic digital radiography method as in claim 1 wherein: the dual-energy photographic detector in the 4) is internally provided with two photosensitive layers and a control unit.

8. A dynamic digital radiography method as in claim 1 wherein: the step of using the image subtraction in said 6) is as follows,

firstly, subtracting low-energy image data from high-energy image data through subtraction operation, and restoring bone data separated by the high-energy image into sequence data to realize dynamic bone image;

the high-energy image data is subtracted from the low-energy image data by subtraction, and the soft tissue data separated by the low-energy image is remained to restore the sequence data, thereby realizing a dynamic soft tissue image.