CN117958859A - Low-dose common screening medical imaging system and spine deformation and lower limb force line common screening method - Google Patents
Low-dose common screening medical imaging system and spine deformation and lower limb force line common screening method Download PDFInfo
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Abstract
The invention provides a low-dose common screening medical imaging system and a spine deformation and lower limb force line common screening method, which are characterized in that an opposite X-ray emitting part, an opposite X-ray receiving part and a rotary bearing table positioned between the two parts are arranged and are used for bearing a person to be screened and rotating by 90 degrees; the X-ray emitting part is provided with an X-ray field adjusting part, and a large target angle X-ray emitting part and a large-size X-ray receiving part are used, so that a part waiting for screening of a whole spine or a whole lower limb can be covered with a short SID distance, and a complete image of the screened part under the current view angle can be obtained by one-time shooting; and a workstation is arranged for receiving the positive image and the lateral image output by the X-ray receiving part, extracting fitting central lines of the two images, drawing a three-dimensional simulation central line, and screening and distinguishing with preset parameters so as to judge the lateral bending or pathological change degree of the corresponding position, and the final common screening report can be obtained only by two X-ray shooting, so that the screening efficiency is high, and the receiving dosage of patients is low.
Description
Technical Field
The invention belongs to the technical field of medical imaging, and particularly relates to a low-dose common screening medical imaging system and a spine deformation and lower limb force line common screening method.
Background
The normal human spine has four bends in the anterior-posterior direction, the cervical spine is convex forward, the thoracic spine is convex backward, the lumbar spine is convex forward, the sacral spine is convex backward, and the spine is similar to an S shape, which is called physiological bending of the spine. Scoliosis refers to the deviation of the spine from the midline to both sides, a three-dimensional deformity of the spine, including sequential abnormalities in coronal, sagittal, and axial positions. The scoliosis can be divided into thoracic vertebra scoliosis, lumbar vertebra scoliosis and thoracic and lumbar joint part scoliosis according to the different occurring positions. Scoliosis generally occurs in the thoracic, lower lumbar and lower lumbar portions of the spine, as well as in the upper lumbar portions and the like, with lateral curvature being most likely to occur particularly in the thoracic portion of the spine. In particular, thoracic lateral curvature refers to the curvature of the thoracic portion of the spine, which is the most common portion of the lateral curvature of the spine, typically involving deformities of the ribs and spine. Lumbar lateral bending occurs at the lower lumbar spine location which may cause one side of the buttocks to appear higher than the other side, or one leg to appear longer than the other. In addition, thoracolumbar joint lateral curvature occurs at the lower thoracic and upper lumbar spine locations, which are often congenital.
Adolescent Idiopathic Scoliosis (AIS) is one of the most common three-dimensional spinal deformities in scoliosis, accounting for about 80% of the total number of idiopathic scoliosis, and clinically, a standing orthographic image of the spine (e.g., X-ray film, etc.) is often defined as scoliosis with an upper bend angle > a predetermined angle (typically 10 °). AIS has a prevalence of 1% -3% in teenagers aged 10-16 years, and AIS not only severely affects the physical appearance of teenagers, but also impairs their respiratory functions, motor functions, mental state, and overall quality of life. The spine operation is long in time consumption, high in risk, complex in instruments used for the operation correction, high in difficulty, high in trauma and multiple in complications (major operation of orthopedics), and the diagnosis is different due to subjectivity existing in the preoperative diagnosis. Research shows that the incidence of AIS increases year by year, and the AIS becomes the third biggest "killer" for children and teenagers in China to be healthy after obesity and myopia, the disease is very common in children and teenagers, about 1.06% of people in China have scoliosis, and the scoliosis prevalence of 10-15 years old teenagers is higher than 5.4%.
However, there is no mature technology for detecting scoliosis, and the existence of each spine with respect to scoliosis (i.e. whether there is a scoliosis problem is detected) is mainly detected by a detector by manually drawing detection auxiliary lines on spine images (e.g. X-ray films of the spine, etc.), and in the case of determining that there is a scoliosis, the scoliosis type is also required to be determined by looking up a table, so that the labor cost is high and the efficiency is low, and the detector must have related expertise to accurately determine the existence of the spine with respect to the scoliosis and the scoliosis type. For example, a tester (e.g., a clinician) typically takes several or tens of minutes to complete a determination of scoliosis in a spine image, and different levels of testers may also have certain differences in the conclusions drawn due to their different levels of expertise.
The existing detection mode of the spine deformation or the lower limb force line is usually a conventional X-ray splicing inspection and novel X-ray slit splicing technology.
Conventional X-ray stitching inspection: in practice, due to the alignment angle error in the splicing process, deviation exists on the accuracy of spine detection, and a doctor determines a spine pathological change conclusion in a manual scribing measurement mode, so that the accuracy of a result is very dependent on the experience accumulation of the doctor technician due to non-uniformity of skill levels, and the efficiency is low.
Novel X-ray slit splicing technology: the cost is high, the angle alignment error can be avoided to a certain extent technically, but full-length scanning is needed, the time is long, and a large amount of database support is needed for building the three-dimensional model. The long exposure time can lead to high radiation dosage and influence human health.
Disclosure of Invention
The invention aims to provide a low-dose common screening medical imaging system and a spine deformation and lower limb force line common screening method, so as to solve the problem that the common screening is difficult to complete due to low screening efficiency of the existing orthopaedics deformity.
The technical scheme of the invention is as follows:
The invention relates to a low-dose common-screen medical imaging system, which comprises:
An X-ray emission unit;
an X-ray receiving unit which is disposed at a distance from the X-ray emitting unit and is opposed to the X-ray emitting unit;
An X-ray radiation field adjusting part which is arranged at the output end of the X-ray emission part and is used for adjusting the upper and lower radiation fields and the left and right radiation fields of the X-ray output by the X-ray emission part;
The rotary bearing table is arranged between the X-ray emission part and the X-ray receiving part and is used for bearing a person to be screened and driving the person to be screened to rotate 90 degrees from a normal shooting position to a side shooting position;
The working station is in signal connection with the X-ray emitting part, the X-ray receiving part and the rotary bearing table;
In the working state, the workstation is used for controlling the X-ray emission part to shoot at the normal shooting position and the lateral shooting position of the rotary bearing table respectively; the X-ray receiving part respectively receives X-rays and outputs a normal position image and a side position image to the workstation; the workstation extracts fitting center lines of the normal image and the side image and draws a three-dimensional simulation center line; and outputting a general screening report based on the preset parameters and the three-dimensional simulation center line screening and distinguishing.
The low-dose common-screen medical imaging system comprises an X-ray emission part, a first lifting unit and an X-ray emission unit, wherein the first lifting unit and the X-ray emission unit are respectively connected with a workstation in a signal mode;
The fixed end of the first lifting unit is arranged on the external platform; the X-ray emission unit is arranged at the lifting end of the first lifting unit.
The low-dose general screening medical imaging system provided by the invention has the advantages that the generation device of the X-ray emission unit is configured to cover the whole spine or the whole lower limb of a person to be screened by the X-ray field; the generating device of the X-ray emitting unit is a large target angle X-ray tube, so that the X-ray field can cover the part waiting to be screened of the whole spine or the whole lower limb under the condition of short SID.
The low-dose common-screen medical imaging system comprises an X-ray receiving part, a first lifting unit and a flat panel detector, wherein the X-ray receiving part comprises a second lifting unit and a flat panel detector which are respectively connected with a workstation through signals;
the fixed end of the second lifting unit is arranged on the external platform; the flat panel detector is arranged at the lifting end of the second lifting unit.
The low-dose common screening medical imaging system of the invention, the X-ray receiving unit is configured to effectively image the whole spine or the whole lower limb of the person to be screened.
The invention discloses a low-dose common-screen medical imaging system, wherein an X-ray radiation field adjusting part is a beam splitter.
According to the low-dose common screening medical imaging system, the visible light positioning system is arranged on the light beam device and used for determining the specific X-ray shooting position of the shooting part of the person to be screened.
According to the low-dose common screening medical imaging system, the portal can cover the part waiting to be screened of the whole spine or the whole lower limb under the short SID.
The invention discloses a spine deformation common screening method which is applied to any one of the low-dose common screening medical imaging systems, and comprises the following steps:
Shooting for the first time: the person to be screened stands on the rotary bearing table, and the workstation outputs a first shooting instruction to the X-ray emission part for shooting; the workstation receives first receiving information obtained by the X-ray receiving part receiving X-rays, and processes the first receiving information to obtain an orthotopic spine full-length image;
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotation bearing table to rotate by 90 degrees; after the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting part for shooting; the workstation receives second receiving information obtained by the X-ray receiving part receiving the X-rays, and processes the second receiving information to obtain a lateral spine full-length image;
The workstation processes the full-length image of the orthotopic spine and the full-length image of the lateral spine by an image algorithm, extracts fitting central lines of the full-length image of the orthotopic spine and the full-length image of the lateral spine, and draws a three-dimensional simulation central line of the human spine; and based on preset parameters and the three-dimensional simulation center line screening and distinguishing of the human spine, outputting the scoliosis degree and the general screening report.
According to the spine deformation common screening method, the full-length image of the orthotopic spine and the full-length image of the lateral spine are all 1-time shooting imaging, the full-length image is obtained through image stitching after multiple imaging, the problem of low success rate of image stitching is avoided, and the problem of increased patient receiving dosage caused by multiple rays is avoided.
In addition, in order to obtain clearer screened part images, an image processing method based on feature learning in low-dose CT is combined, a feature dictionary D is constructed through learning sample data, a signal y to be represented is represented by the feature dictionary D, and a sparse representation coefficient alpha can be solved by a sparse coding algorithm for the constructed feature dictionary D and the signal y to be represented;
The sparse coding algorithm comprises: for a given signal y e R N to be represented, and the learned feature dictionary D, d= { D i∈RM|||di||2 =1, 1+.i+.ltoreq.m }, the signal y to be represented may be represented as a linear combination of several feature basis signals D i, i.e. y=d×a;
When M is more than N, the feature dictionary D is called an overcomplete feature dictionary, a plurality of solutions are sparsely represented, different linear combinations are used for representing the signal y to be represented, and in the process of solving, only the solutions meeting a certain sparsity condition are needed to be selected; sparsity may be represented by an L0 norm and the sparsely learned mathematical model may be represented as: Wherein |·| 0 is an L0 pseudo-norm, α is a sparse representation coefficient, D is a feature dictionary, y is a signal to be represented, M is the number of required primitives, and N is the number of sample elements.
The invention relates to a lower limb force line common screening method which is characterized by being applied to the low-dose common screening medical imaging system as described in any one of the above, and comprises the following steps:
Shooting for the first time: the person to be screened stands on the rotary bearing table, and the workstation outputs a first shooting instruction to the X-ray emission part for shooting; the workstation receives first receiving information obtained by the X-ray receiving part receiving X-rays, processes the first receiving information and obtains a full-length image of the normal lower limb force line;
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotation bearing table to rotate by 90 degrees; after the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting part for shooting; the workstation receives second receiving information obtained by the X-ray receiving part receiving the X-rays, processes the second receiving information and obtains a full-length image of the lateral lower limb force line;
The workstation processes the full-length image of the orthotopic lower limb force line and the full-length image of the lateral lower limb force line by an image algorithm, extracts a fitting central line of the full-length image of the orthotopic lower limb force line and the full-length image of the lateral lower limb force line, and draws a three-dimensional simulation central line of the human lower limb force line; and based on preset parameters and the three-dimensional simulated center line screening and distinguishing of the human lower limb force line, outputting the lower limb force line pathological change degree and a common screening report.
By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:
According to the embodiment of the invention, the opposite X-ray emitting part, the X-ray receiving part and the rotary bearing table arranged between the X-ray emitting part and the X-ray receiving part are arranged, so that the rotary bearing table is used for bearing a person to be screened and rotating by 90 degrees; the X-ray emitting part is provided with an X-ray field adjusting part, and a large target angle X-ray emitting part and a large-size X-ray receiving part are used, so that a part waiting for screening of a whole spine or a whole lower limb can be covered with a short SID distance, and a complete image of the screened part under the current view angle can be obtained by one-time shooting; and a workstation is arranged for controlling the X-ray emitting part and the rotary bearing table to carry out shooting twice in a matched manner, receiving the positive image and the lateral image output by the X-ray receiving part, extracting the fitting center line of the two images, drawing a three-dimensional simulation center line, carrying out screening and distinguishing with preset parameters, judging the lateral bending or lesion degree of the corresponding position, and giving a common screening report. According to the method, the three-dimensional simulation center line of the screened part can be obtained only by two X-ray shooting, a common screening report is obtained, the screening efficiency is high, the radiation dose is low, and therefore the problem that the common screening is difficult to complete due to the low screening efficiency of the conventional orthopaedics malformation is solved.
Drawings
FIG. 1 is a schematic diagram of a low dose conventional medical imaging system according to the present invention;
FIG. 2 is a flow chart of the low dose prescreening medical imaging system of the present invention;
fig. 3 is a schematic diagram of a sparse representation process of a sparse coding algorithm.
Reference numerals illustrate: 1: a first lifting unit; 2: a second lifting unit; 3: an X-ray emission unit; 4: an X-ray receiving unit; 5: an X-ray field adjusting section; 6: and rotating the bearing table.
Detailed Description
The invention provides a low-dose common screening medical imaging system and a spine deformation and lower limb force line common screening method which are further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims.
Example 1
Referring to fig. 1 and 2, in one embodiment, a low dose common screen medical imaging system includes an X-ray emitting portion 3, an X-ray receiving portion 4, an X-ray field adjusting portion 5, a rotating gantry 6, and a workstation.
The X-ray receiving unit 4 is disposed to be spaced apart from and opposed to the X-ray emitting unit 3. The rotary bearing table 6 is arranged between the X-ray emitting part 3 and the X-ray receiving part 4 and is used for bearing a person to be screened and driving the person to be screened to rotate 90 degrees from the normal shooting position to the side shooting position.
The X-ray field adjusting part 5 is disposed at the output end of the X-ray emitting part 3, and is used for adjusting the upper and lower fields and the left and right fields of the X-ray emitted by the X-ray emitting part 3, so that the part to be screened can be completely covered by a single shooting.
The workstation is in signal connection with the X-ray emitting part 3, the X-ray receiving part 4 and the rotary carrying table 6.
In the working state, the workstation is used for controlling the X-ray emitting part 3 to respectively shoot at the normal shooting position and the lateral shooting position of the rotary bearing table 6. The X-ray receiving unit 4 receives the X-rays and outputs the normal image and the side image to the workstation. The workstation extracts fitting center lines of the normal image and the side image, and draws a three-dimensional simulation center line. And outputting a general screening report based on the preset parameters and the screening and distinguishing of the three-dimensional simulation center line.
In the embodiment, the opposite X-ray emitting part 3, the X-ray receiving part 4 and the rotary bearing table 6 positioned between the X-ray emitting part and the X-ray receiving part are arranged for bearing the person to be screened and rotating by 90 degrees; an X-ray field adjusting part 5, a large target angle X-ray emitting part 3 and a large-size X-ray receiving part 4 are arranged on the X-ray emitting part 3, so that a part waiting for screening of the whole spine or the whole lower limb can be covered with a short SID distance, and a complete image of the screened part under the current visual angle can be obtained by one shooting; and a workstation is arranged for controlling the X-ray emitting part 3 and the rotary bearing table 6 to carry out shooting twice in a matched manner, receiving the righting image and the lateral image output by the X-ray receiving part 4, extracting fitting center lines of the two images, drawing a three-dimensional simulation center line, carrying out screening and distinguishing with preset parameters, judging the lateral bending or lesion degree of the corresponding position, and giving a common screening report. According to the embodiment, the three-dimensional simulation center line of the screened part can be obtained only by two X-ray shooting, the common screening report is obtained, and the problems of low image stitching success rate and increased patient receiving dosage caused by multiple rays are avoided. The screening efficiency is effectively improved, and the radiation dose is reduced, so that the problem that the conventional orthopedic deformity screening efficiency is low, and the common screening is difficult to complete is solved.
And the low-dose common screening medical imaging system of the embodiment has the advantages of simple system structure and low cost, and is more beneficial to the popularization of wide common screening.
The specific structure of the low-dose common-screen medical imaging system of this embodiment is further described below:
In the present embodiment, the X-ray emitting section 3 may include a first elevation unit 1 and an X-ray emitting unit, which are respectively connected to the workstation signal. The fixed end of the first lifting unit 1 is arranged on an external platform. The X-ray emission unit is arranged at the lifting end of the first lifting unit 1.
In the present embodiment, the X-ray receiving section 4 includes the second elevating unit 2 and the flat panel detector, which are respectively connected to the workstation signals. The fixed end of the second lifting unit 2 is arranged on the external platform. The flat panel detector is arranged at the lifting end of the second lifting unit 2.
The medical imaging system of the embodiment can realize the adaptation of the personnel to be screened with different heights or the adaptation of different screening positions by the arrangement of the first lifting unit 1 and the second lifting unit 2; for example, when the person to be screened is a child, the lifting ends of the two lifting units can be lowered; the different screening parts can be the spinal column or the lower limb force line, etc.
Specifically, the first lifting unit 1 and the second lifting unit 2 may be existing mechanisms with lifting functions, and the implementation manner may also be various, for example, a gear-rack fit, a linear motor, etc., so that the lifting functions can be realized.
Because the deformation based on the spine is easy to occur to children, the body shape of the children is smaller, and clearer images can be obtained under lower radiation dose. Therefore, the generating device of the X-ray emitting unit of the embodiment can be set as a large target angle X-ray tube, and the X-ray field can be ensured to cover the whole spine or the whole lower limb waiting for the screening part under the condition of shorter SID (source to image receptor distance). The method realizes the disposable imaging of the whole spine or the whole lower limb of the patient, and can obtain the image meeting the medical requirement with lower radiation dose by combining an image processing algorithm based on feature learning. In this embodiment, the X-ray emitting unit may also use other X-ray source devices, and the bulb thereof may be replaced only, which is not particularly limited herein.
In this embodiment, the X-ray receiving unit may be a large-sized flat panel detector, and the effective imaging area can cover the part waiting for screening of the whole spine or the whole lower limb, so as to realize disposable imaging of the whole spine or the whole lower limb of the patient, and can realize the image acquisition success rate of 100% of the whole spine or the whole lower limb, so that the problems of increased radiation dose caused by multiple imaging and low image acquisition success rate caused by image stitching are avoided.
Further, the size of the flat panel detector can be selected according to specific situations, for example, when the person to be screened is a child, the size of the flat panel detector can be smaller due to smaller pediatric body types, and only the part to be screened, which meets the child, needs to be completely covered. Alternatively, the size of the flat panel detector may be affected by the different screening sites such as the spinal column and lower limb force lines.
Preferably, based on an algorithm, the bulb tube can be set to convert high-low energy into excitation high-low energy rays, and bone density can be measured while shooting a part to be screened, so that a reasonable suggestion is provided.
In the present embodiment, the X-ray field adjusting section 5 is a beam splitter. The beam splitter window can have stepless automatic manual non-central adjusting function, meets the requirement of on-demand adjustment of asymmetrical shooting parts of tested personnel, realizes shooting accuracy, reduces scattered radiation in the shooting process of X rays, and can be preset in a workstation to finish remote window presetting of the beam splitter.
Further, a visible light positioning system can be arranged on the beam splitter and used for determining the specific X-ray shooting position of the shooting part of the person to be screened, so that the accuracy of the advanced planning of X-ray shooting is realized, and the scattered radiation in the shooting process of X-rays is reduced. In particular a visible light generating unit arranged in the beam splitter, the generated visible light irradiates the part to be screened under the restraint of the beam splitter, so that the shooting range of X-ray can be obtained.
In this embodiment, the size of the field is adjusted by the beam splitter so that the field completely covers the site to be screened.
In this embodiment, the rotary carrier 6 may be a rotary pedal, and the rotation function thereof may be achieved by a motor and a transmission mechanism including a gear or other transmission structure, which is not limited herein.
Example two
The embodiment provides a spine deformation common screening method, which is applied to the low-dose common screening medical imaging system in the first embodiment, and is as follows:
The person to be screened stands on the rotary bearing table 6, and the body posture is adjusted and kept unchanged; the heights of the first lifting unit 1 and the second lifting unit 2 are adjusted, a visible light positioning system is opened through a workstation, a window of a light beam device is adjusted according to a part to be screened until the light coverage range on the body of a person to be screened meets the requirement of the whole spine, and shooting preparation is completed; (meanwhile, the X-ray window adjusting part can adjust the size of the window by a manual on-site opening adjusting mode).
Shooting for the first time: the workstation outputs a first shooting instruction to the X-ray emitting section 3 for shooting. The workstation receives the first receiving information obtained by the X-ray receiving part 4 receiving the X-rays, and obtains the full-length image of the orthotopic spine after signal conversion and computer processing.
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotary bearing table 6 to rotate by 90 degrees. After the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting section 3 for shooting. The workstation receives the second receiving information obtained by the X-ray receiving part 4 receiving the X-ray, and obtains the full-length image of the lateral spine after signal conversion and computer processing.
And after the workstation performs image algorithm processing on the full-length image of the orthotopic spine and the full-length image of the lateral spine, extracting fitting central lines of the full-length image of the orthotopic spine and the full-length image of the lateral spine, and drawing a three-dimensional simulation central line of the human spine. And based on preset parameters and the three-dimensional simulation center line screening and distinguishing of the human spine, outputting the scoliosis degree and the general screening report.
This common screening operation ends. And then, doctors and tested personnel can organize the later diagnosis and treatment scheme according to the report.
In this embodiment, the full-length image of the orthotopic spine and the full-length image of the lateral spine are all 1 shot images, so that the full-length image is obtained through image stitching after multiple images are avoided, the problem of low success rate of image stitching is avoided, and the problem of increased patient receiving dosage caused by multiple rays is avoided. Effectively improves screening efficiency and reduces the dosage received by patients.
In addition, in order to obtain clearer screened part images, an image processing method based on feature learning in low-dose CT is combined, a feature dictionary is constructed by learning sample data, and signals are represented by the feature dictionary. For a constructed dictionary and signals to be represented, the representation coefficients can be solved by using a sparse coding algorithm.
For a given signal y e R N, and the learned feature dictionary D, d= { D i∈RM|||di||2 =1, 1+.i+.m }, the signal can be represented as a linear combination of several feature basis signals di, i.e., y=d×a. When M > N, the dictionary D is called an overcomplete feature dictionary, the sparse representation has a plurality of solutions, different linear combinations are used for representing the signal y, and in the process of solving, only the solutions meeting a certain sparsity condition are needed to be selected. At this time, the sparsity may be represented by an L0 norm, and the sparsity-learned mathematical model may be represented as: Wherein |·| 0 is an L0 pseudo-norm, α is a sparse representation coefficient, D is a dictionary, y is a signal to be represented, M is the number of required primitives, N is the number of sample elements, and the sparse representation process is shown in fig. 3.
Furthermore, after the graph processing method is adopted, the CT dose required by the common screening method can be smaller than 0.6mSv, and the radiation dose received by the person to be screened can be further reduced.
Example III
The embodiment provides a lower limb force line common screening method, which is characterized by being applied to the low-dose common screening medical imaging system in the first embodiment, and comprising the following steps:
the person to be screened stands on the rotary bearing table 6, and the body posture is adjusted and kept unchanged; the heights of the first lifting unit 1 and the second lifting unit 2 are adjusted, a visible light positioning system is opened through a workstation, a window of a light beam device is adjusted according to a part to be screened until the light coverage range on the body of a person to be screened meets the requirement of the whole length of a lower limb force line, and shooting preparation is completed; (at the same time, the X-ray window adjusting part can manually adjust the size of the window in a field opening and adjusting mode)
Shooting for the first time: the person to be screened stands on the rotary bearing table 6, and the workstation outputs a first shooting instruction to the X-ray emitting part 3 for shooting. The workstation receives the first receiving information obtained by the X-ray receiving part 4 receiving the X-rays, and obtains the full-length image of the normal lower limb force line after signal conversion and computer processing.
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotary bearing table 6 to rotate by 90 degrees. After the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting section 3 for shooting. The workstation receives the second receiving information obtained by the X-ray receiving part 4 receiving the X-rays, and obtains the full-length image of the lateral lower limb force line after signal conversion and computer processing.
The workstation processes the full-length image of the normal lower limb force line and the full-length image of the lateral lower limb force line by an image algorithm, extracts a fitting central line of the full-length image of the normal lower limb force line and the full-length image of the lateral lower limb force line, and draws a three-dimensional simulation central line of the human lower limb force line. And based on preset parameters and the three-dimensional simulated center line screening and distinguishing of the human lower limb force line, outputting the lower limb force line pathological change degree and the common screening report.
This common screening operation ends. And then, doctors and tested personnel can organize the later diagnosis and treatment scheme according to the report.
The image processing method of the present embodiment is the same as that of the second embodiment, and will not be described in detail herein.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.
Claims (10)
1. A low dose, common screening medical imaging system, comprising:
An X-ray emission unit;
an X-ray receiving unit which is disposed at a distance from the X-ray emitting unit and is opposed to the X-ray emitting unit;
An X-ray radiation field adjusting part which is arranged at the output end of the X-ray emission part and is used for adjusting the upper and lower radiation fields and the left and right radiation fields of the X-ray output by the X-ray emission part;
The rotary bearing table is arranged between the X-ray emission part and the X-ray receiving part and is used for bearing a person to be screened and driving the person to be screened to rotate 90 degrees from a normal shooting position to a side shooting position;
The working station is in signal connection with the X-ray emitting part, the X-ray receiving part and the rotary bearing table;
In the working state, the workstation is used for controlling the X-ray emission part to shoot at the normal shooting position and the lateral shooting position of the rotary bearing table respectively; the X-ray receiving part respectively receives X-rays and outputs a normal position image and a side position image to the workstation; the workstation extracts fitting center lines of the normal image and the side image and draws a three-dimensional simulation center line; and outputting a general screening report based on the preset parameters and the three-dimensional simulation center line screening and distinguishing.
2. The low dose prescreening medical imaging system of claim 1, wherein the X-ray emitting section comprises a first elevation unit and an X-ray emitting unit respectively in signal connection with the workstation;
The fixed end of the first lifting unit is arranged on the external platform; the X-ray emission unit is arranged at the lifting end of the first lifting unit.
3. The low dose, common screening medical imaging system of claim 2, wherein the generating means of the X-ray emitting unit is configured to X-ray field cover the entire spine or the entire lower extremities of the person to be screened.
4. The low dose, prescreening medical imaging system of claim 1, wherein the X-ray receiving section comprises a second elevation unit and a flat panel detector in signal connection with the workstation, respectively;
the fixed end of the second lifting unit is arranged on the external platform; the flat panel detector is arranged at the lifting end of the second lifting unit.
5. The low dose prescreening medical imaging system of claim 4, wherein the X-ray receiving unit is configured to effectively image an area covering a full spine or a full lower limb of a person to be screened.
6. The low dose, common-screen medical imaging system of claim 1, wherein the X-ray field adjustment section is a beam splitter.
7. The low dose, common screen medical imaging system of claim 6, wherein the beam light device is provided with a light field indication for determining a specific X-ray photographing position of a person to be screened.
8. A method for screening a deformed spine, which is applied to the low-dose screening medical imaging system as claimed in any one of claims 1 to 7, and comprises the following steps:
Shooting for the first time: the person to be screened stands on the rotary bearing table, and the workstation outputs a first shooting instruction to the X-ray emission part for shooting; the workstation receives first receiving information obtained by the X-ray receiving part receiving X-rays, and processes the first receiving information to obtain an orthotopic spine full-length image;
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotation bearing table to rotate by 90 degrees; after the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting part for shooting; the workstation receives second receiving information obtained by the X-ray receiving part receiving the X-rays, and processes the second receiving information to obtain a lateral spine full-length image;
The workstation processes the full-length image of the orthotopic spine and the full-length image of the lateral spine by an image algorithm, extracts fitting central lines of the full-length image of the orthotopic spine and the full-length image of the lateral spine, and draws a three-dimensional simulation central line of the human spine; and based on preset parameters and the three-dimensional simulation center line screening and distinguishing of the human spine, outputting the scoliosis degree and the general screening report.
9. The spine deformation common screening method according to claim 8, wherein the image algorithm is processed as follows:
Constructing a feature dictionary D through learning sample data, representing a signal y to be represented by using the feature dictionary D, and solving a sparse representation coefficient alpha for the constructed feature dictionary D and the signal y to be represented by using a sparse coding algorithm;
The sparse coding algorithm comprises: for a given signal y e R N to be represented, and the learned feature dictionary D, d= { D i∈RM|||di||2 =1, 1+.i+.ltoreq.m }, the signal y to be represented may be represented as a linear combination of several feature basis signals D i, i.e. y=d×a;
When M is more than N, the feature dictionary D is called an overcomplete feature dictionary, a plurality of solutions are sparsely represented, different linear combinations are used for representing the signal y to be represented, and in the process of solving, only the solutions meeting a certain sparsity condition are needed to be selected; sparsity may be represented by an L0 norm and the sparsely learned mathematical model may be represented as: s.t.y=d.a, where |·| 0 is the L0 pseudo-norm, α is the sparse representation coefficient, D is the feature dictionary, y is the signal to be represented, M is the number of required primitives, and N is the number of sample elements.
10. A lower limb force line common screening method, which is applied to the low dose common screening medical imaging system as claimed in any one of claims 1 to 7, and comprises the following steps:
Shooting for the first time: the person to be screened stands on the rotary bearing table, and the workstation outputs a first shooting instruction to the X-ray emission part for shooting; the workstation receives first receiving information obtained by the X-ray receiving part receiving X-rays, processes the first receiving information and obtains a full-length image of the normal lower limb force line;
Shooting for the second time: after the first shooting is completed, the workstation outputs a rotation instruction to the rotation bearing table to rotate by 90 degrees; after the rotation is completed, the workstation outputs a second shooting instruction to the X-ray emitting part for shooting; the workstation receives second receiving information obtained by the X-ray receiving part receiving the X-rays, processes the second receiving information and obtains a full-length image of the lateral lower limb force line;
The workstation processes the full-length image of the orthotopic lower limb force line and the full-length image of the lateral lower limb force line by an image algorithm, extracts a fitting central line of the full-length image of the orthotopic lower limb force line and the full-length image of the lateral lower limb force line, and draws a three-dimensional simulation central line of the human lower limb force line; and based on preset parameters and the three-dimensional simulated center line screening and distinguishing of the human lower limb force line, outputting the lower limb force line pathological change degree and a common screening report.
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