CN109363682A - The first preoperative plan MRI/CT of knee prosthesis is scanned and computer image processing method - Google Patents
The first preoperative plan MRI/CT of knee prosthesis is scanned and computer image processing method Download PDFInfo
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- CN109363682A CN109363682A CN201811286925.1A CN201811286925A CN109363682A CN 109363682 A CN109363682 A CN 109363682A CN 201811286925 A CN201811286925 A CN 201811286925A CN 109363682 A CN109363682 A CN 109363682A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/50—Clinical applications
- A61B6/505—Clinical applications involving diagnosis of bone
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
Abstract
This patent provides a kind of preoperative plan MRI/CT scanning of first knee prosthesis and computer image processing method, which is characterized in that described method includes following steps: Step 1: knee joint scan；Step 2: hip joint scans；Step 3: ankle joint is scanned；Step 4: image data is collected and processing.The present invention is applied to the preparation before initial total knee arthroplasty, collection of the area of computer aided lower limb mechanics to the image data of line.The preoperative evaluation and mechanics that Magnetic resonance imaging (MRI) technology is widely used in scanned person are to line analysis.Knee-hip-ankle partial sweep piece positioning simultaneously, can precisely align bone marker, greatly improve to line precision, reach positive and negative 1.5 degree.The processing of Intelli-Ortho software, confirms distal femur osteotomy surface, and the precision and postoperative function for operation are restored, and has great clinical meaning.
Description
Technical field
This patent belongs to technical field of imaging, sweeps in particular to a kind of first preoperative plan MRI/CT of knee prosthesis
It retouches and computer image processing method.
Background technique
Total knee arthroplasty (total knee arthroplasty, TKA) is applied successfully in modern age artificial hip joint
A kind of new technology for treating diseases of knee joint having gradually developed after patient Yu, it can effectively eradicate advanced stage knee joint
Slight illness greatlys improve the quality of life of patient.
Curative effect depends on many factors after initial total knee arthroplasty, and the correct lower limb line of force is the most heavy of postoperative service life
The factor wanted.Prosthese to line and rotation for initial total knee arthroplasty (total knee arthroplasty, TKA)
It is most important.Mistake can lead to inordinate wear, early stage loosening and patellofemoral joint disease to line and rotation.
The good line of force is still a major challenge of total knee arthroplasty (TKR) after Reconstruction, is often depending on patient's
Clinical experience.
Summary of the invention
This patent is based on the demand of the prior art and proposes, the technical problems to be solved by the patent is to provide
A kind of preoperative plan MRI/CT scanning of first knee prosthesis and computer image processing method, for human body lower limbs by sweeping
Imaging is retouched in order to the lower limb power Line To Line of first total knee replacement, preoperative plan or operation risk assessment.
To solve the above-mentioned problems, the technical solution of this patent offer includes:
Step 1: knee joint scan, carries out kneed scanning in this step, specifically comprises the following steps: S101
MRI scan parameter is set, is specifically included: scanning slice thickness 2mm；Sweep span 1mm, field range 240mm, influences resolution
256*160dpi, NEX/NSA/NAQ value are 2；Scanned object is placed in dorsal position by S102, and by the duty as far as possible of target knee joint in
The center of IOS.Ensure ankle joint natural relaxation, is in " Toes Up " in neutral position (10 °~30 ° plantar flexions) ankle, and add
With fixation.Central region is positioned into knee joint line, range is each 200 millimeters up and down of knee joint line.S103 slices scanned positioning: selection
There is the shaft-like piece of Patella tracking, in piece, marks epicondyle axis；Ensure that coronal scan is parallel to Patella tracking, S104: sweeps
Condyle of femur and shin bone must be completely covered by retouching coverage area.S105 selects the scanning slice of sagittal plain knee central section as with reference to figure
Picture, and picture centre is adjusted with femur center.Ensure sagittal scan positioning perpendicular to the joint line of axis on femoral lateral condyle condyle；
Step 2: hip joint scans, kneed scanning is carried out in this step, specifically includes following sub-step:
S201 Scan orientation setting MRI coronal scan position line is parallel to neck of femur long axis；S202 ensures late-segmental collapse in the visual field
The heart；
Step 3: ankle joint is scanned, in ankle joint when sagittal scan, setting MRI sagittal scan position line is parallel
In tibial axis；Ensure central region 3 centimetres or so more than ankle-joint；
Step 4: image data is collected and processing；It in this step will be Step 1: two, three obtained image datas be collected
After handled, specifically include following sub-step:
S401 all images utilize the Intelli-Ortho of J2EE Development of Framework with the storage of DICOM file format, data
Portal website carries out the upload of data inputting and image data, and confirmation operation case file is from client transmissions to cloud service
Device.Using Intelli-Ortho Transformer, (foundation based on VTK Open Framework customizes DICOM data processing journey to S402
Sequence), operation case file, including relevant DICOM image file are downloaded from cloud；S403 is in Intelli-Ortho
Transformer carries out the label of bone mark object, and label content includes the late-segmental collapse of hip joint, distal femur knee joint
Central point, the kneed central point of proximal tibia and the central point in ankle joint.S404 according to the three-dimensional coordinate of marker,
And lower limb mechanics is obtained to line angle degree by calculating.Dissect the angle of the line of force and the mechanical line of forceθIt calculates as follows: Wherein, H (Xh,Yh,Zh) be hip joint late-segmental collapse coordinate；F(Xf,Yf,Zf) it is that distal femur is kneed
Center point coordinate；T(Xt,Yt,Zt) it is the kneed center point coordinate of proximal tibia: A (Xa Ya,Za) be ankle joint center
Point coordinate: the vector of the hip knee machinery line of force:The vector of the hip knee machinery line of force:
The present invention is applied to the preparation before initial total knee arthroplasty, shadow of the area of computer aided lower limb mechanics to line
As the collection of data.The preoperative evaluation and mechanics that Magnetic resonance imaging (MRI) technology is widely used in scanned person are to line analysis.
Knee-hip-ankle partial sweep piece positioning simultaneously, can precisely align bone marker, greatly improve to line precision, reached just
Minus 1.5 degree.The processing of Intelli-Ortho software confirms distal femur osteotomy surface, extensive for the precision and postoperative function of operation
It is multiple, there is great clinical meaning.
Detailed description of the invention
Fig. 1 is Transepicondylar axis piece positioning figure；
Fig. 2 is MRI knee joint coronal scan areal map；
Fig. 3 is the location drawing of the neck of femur long axis in shaft-like position；
Fig. 4 is ankle joint Scan orientation line and central region figure；
Fig. 5 is the position view of each sagittal plane in knee joint.
Specific embodiment
Specific implementation of the patent mode is illustrated with reference to the accompanying drawing, it should be pointed out that the specific embodiment party
Formula is only the citing to this patent optimal technical scheme, can not be interpreted as the limitation to the scope of this patent.
A kind of preoperative plan MRI/CT scanning of first knee prosthesis and computer shadow are provided in present embodiment
As processing method；Described method includes following steps:
Step 1: knee joint scan
Kneed scanning is carried out in this step, is specifically comprised the following steps:
S101 sets MRI scan parameter, specifically includes: scanning slice thickness 2mm；Sweep span 1mm, field range
240mm, influences resolution 256*160dpi, and NEX/NSA/NAQ value is 2.
Scanned object is placed in dorsal position by S102, and by the duty as far as possible of target knee joint in the center of IOS.Ensure that ankle closes
Natural relaxation is saved, is in " Toes Up " in neutral position (10 °~30 ° plantar flexions) ankle, and fixed.Central region is determined
Position knee joint line, range are each 200 millimeters up and down of knee joint line.
The positioning of S103 slices scanned: selection has the shaft-like piece of Patella tracking, in piece, marks epicondyle axis；Ensure Coronal
Scanning is parallel to Patella tracking, referring to Fig. 1.
S104: condyle of femur and shin bone must be completely covered in scanning coverage area, referring to fig. 2.
S105 selects the scanning slice of sagittal plain knee central section as reference picture, and in femur center adjustment image
The heart.Ensure sagittal scan positioning perpendicular to the joint line of axis on femoral lateral condyle condyle.
Step 2: hip joint scans
Kneed scanning is carried out in this step, specifically includes following sub-step:
S201 Scan orientation setting MRI coronal scan position line is parallel to neck of femur long axis.It is shown referring to the straight line of Fig. 3
Position of the neck of femur long axis in shaft-like position；
S202 ensures late-segmental collapse in central region.
Step 3: ankle joint is scanned
In ankle joint when sagittal scan, setting MRI sagittal scan position line is parallel to tibial axis.Ensure central region
3 centimetres or so more than ankle-joint, Scan orientation line and central region referring to fig. 4.
Step 4: image data is collected and processing
In this step by Step 1: two, three obtained image datas collect after handle, specifically include following son
Step:
S401 all images utilize the Intelli-Ortho of J2EE Development of Framework with the storage of DICOM file format, data
Portal website carries out the upload of data inputting and image data, and confirmation operation case file is from client transmissions to cloud service
Device.
Using Intelli-Ortho Transformer, (foundation based on VTK Open Framework customizes DICOM data to S402
Processing routine), operation case file, including relevant DICOM image file are downloaded from cloud；
S403 carries out the label of bone mark object in Intelli-Ortho Transformer, and label content includes that hip closes
In the kneed central point of the late-segmental collapse of section, distal femur, the kneed central point of proximal tibia and ankle joint
Heart point.
S404 obtains lower limb mechanics to line angle degree according to the three-dimensional coordinate of marker, and by calculating.Dissect the line of force and machine
The angle of the tool line of forceθIt calculates as follows:Wherein, H (Xh,Yh,Zh) sat for the late-segmental collapse of hip joint
Mark；F(Xf,Yf,Zf) it is the kneed center point coordinate of distal femur；T(Xt,Yt,Zt) it is the kneed central point of proximal tibia
Coordinate: A (Xa Ya,Za) be ankle joint center point coordinate: the vector of the hip knee machinery line of force:Hip knee is mechanical
The vector of the line of force:
The accuracy of imaging data is often depending on the cooperation of scanned person.Traditional lower limb line of force scanning, time-consuming, quilt
Scanning person often moves, and causes the fuzzy of image, diagnostic imaging and preoperative planning.Traditional lower limb overall length line of force is different to sweep
It retouches, this patent uses knee-hip-ankle partial sweep combination world coordinates system, and sweep time is greatly decreased, and reduces scanned person
The mobile negative effect to iconography precision of lower limb.
The present invention is applied to the preparation before initial total knee arthroplasty, shadow of the area of computer aided lower limb mechanics to line
As the collection of data.The preoperative evaluation and mechanics that Magnetic resonance imaging (MRI) technology is widely used in scanned person are to line analysis.
Knee-hip-ankle partial sweep piece positioning simultaneously, can precisely align bone marker, greatly improve to line precision, reached just
Minus 1.5 degree.The processing of Intelli-Ortho software confirms distal femur osteotomy surface, extensive for the precision and postoperative function of operation
It is multiple, there is great clinical meaning.
Claims (1)
1. a kind of preoperative plan MRI/CT of first knee prosthesis is scanned and computer image processing method, which is characterized in that institute
The method of stating includes the following steps:
Step 1: knee joint scan
Kneed scanning is carried out in this step, is specifically comprised the following steps:
S101 sets MRI scan parameter, specifically includes: scanning slice thickness 2mm；Sweep span 1mm, field range 240mm, shadow
Resolution 256*160dpi is rung, NEX/NSA/NAQ value is 2；
Scanned object is placed in dorsal position by S102, and by the duty as far as possible of target knee joint in the center of IOS；Ensure ankle joint certainly
So loosen, is in neutral position, and fixed；Central region is positioned into knee joint line, range is knee joint line each 200 milli up and down
Rice.
The positioning of S103 slices scanned: selection has the shaft-like piece of Patella tracking, in piece, marks epicondyle axis；Ensure coronal scan
It is parallel to Patella tracking；
Condyle of femur and shin bone is completely covered in S104 scanning coverage area；
S105 selects the scanning slice of sagittal plain knee central section as reference picture, and adjusts picture centre with femur center, really
Sagittal scan positioning is protected perpendicular to the joint line of axis on femoral lateral condyle condyle；
Step 2: hip joint scans, kneed scanning is carried out in this step, specifically includes following sub-step:
S201 Scan orientation setting MRI coronal scan position line is parallel to neck of femur long axis；
S202 ensures late-segmental collapse in central region；
Step 3: ankle joint is scanned, in ankle joint when sagittal scan, setting MRI sagittal scan position line is parallel to shin
Axis of bone；Ensure central region 3 centimetres more than ankle-joint；
Step 4: image data is collected and processing；In this step by Step 1: two, three obtained image datas collect it is laggard
Row processing, specifically includes following sub-step:
S401 all images with DICOM file format storage, data Intelli-Ortho portal website carry out data inputting and
The upload of image data, confirmation operation case file is from client transmissions to cloud server；
S402 utilizes Intelli-Ortho Transformer, downloads operation case file, including relevant DICOM from cloud
Image file；
S403 carries out the label of bone mark object in Intelli-Ortho Transformer, and label content includes hip joint
The central point of the kneed central point of late-segmental collapse, distal femur, the kneed central point of proximal tibia and ankle joint；
S404 obtains lower limb mechanics to line angle degree according to the three-dimensional coordinate of marker, and by calculating.Dissect the line of force and mechanical force
The angle of lineθIt calculates as follows:Wherein, H (Xh,Yh,Zh) be hip joint late-segmental collapse coordinate；F
(Xf,Yf,Zf) it is the kneed center point coordinate of distal femur；T(Xt,Yt,Zt) it is the kneed center point coordinate of proximal tibia:
A(Xa Ya,Za) be ankle joint center point coordinate: the vector of the hip knee machinery line of force:The hip knee machinery line of force
Vector:
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| CN117542528A (en) * | 2024-01-10 | 2024-02-09 | 中国人民解放军总医院第一医学中心 | Ankylosing spondylitis hip joint affected risk marking system based on image histology |
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Application publication date: 20190222 |