CN206726528U - A kind of X ray simulates camera system - Google Patents
A kind of X ray simulates camera system Download PDFInfo
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- CN206726528U CN206726528U CN201621047676.7U CN201621047676U CN206726528U CN 206726528 U CN206726528 U CN 206726528U CN 201621047676 U CN201621047676 U CN 201621047676U CN 206726528 U CN206726528 U CN 206726528U
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- ray
- source
- simulation
- position tracking
- tracking device
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Abstract
It the utility model is related to a kind of X ray simulation camera system, the system includes X ray picture pick-up device, also include the position tracking device and simulation X source being installed on the X ray picture pick-up device, the position tracking device and simulation X source are arranged above subject, utilize the locus of position tracking device renewal subject, utilize the projecting direction for simulating X source simulation X ray, calculate virtual X-ray and penetrate and decay caused by subject, so as to obtain digital X-ray photographed images.Compared with prior art, the utility model can carry out radiationless X ray to arbitrary objects and simulate shooting, while can realize the shooting simulation of the x-ray under any position, have the advantages that applied widely, safe operation is reliable.
Description
Technical field
X ray simulation camera technology field is the utility model is related to, camera system is simulated more particularly, to a kind of X ray.
Background technology
Since roentgen in 1895 has found X ray, X ray image capture method is always base caused by Radiation Medicine image
Plinth.Study equally to X ray image capture method is to grasp the basis of all kinds of medical imaging device shootings, is medical image working people
The basic skills that member must grasp.
In actual image documentation equipment training on operation, produce that the high-tension apparatus of x-ray is expensive, with certain height during operation
Pressure is dangerous；Simultaneously because the penetrability of x-ray, operator and subject inevitably receive doses X ray, cause
Ionization radiation injury；Because x-ray bulb freedom of motion is limited by mechanical erection, the image for obtaining special posture is also one
Very challenging work, trainer need to repeat to put into practice the technical key point for being repeatedly just understood that correlation.
Keep Clear-High Voltage during in order to eliminate x-ray shooting property and radiation injury, strengthen the flexibility of study, have and utilize x-ray
The scanning of CT machines obtains three-dimensional (body) data of subject, resets the position and direction of virtual X source, according to x-ray penetrate by
The Transmission Attenuation model of object is taken the photograph, calculating projects to caused X ray bidimensional digital picture on virtual image element, completes X and penetrates
Line virtually images.Although this method can produce X ray bidimensional digital picture, whole shooting process is all virtual process, by
The operation that instruction person lacks to physical device perceives chance；Image caused by simultaneously virtual is only limited to model present in database,
System does not have universality.
In order to allow trainee there are more equipment operation chances, there is the die body surface that diminution is projected to using laser rays
Method, simulate x-ray tomography scan mode.According to the position of laser line scanning, faultage image can be existing from being stored in computer
CT sectional slices data produce.Because laser positioning can not possibly be identical with advance CT tomoscans angle, display is transferred
Image be not real radioscopic image, and this method can not produce the ray imaging measurement result under other angles.
Utility model content
The purpose of this utility model is exactly to provide a kind of X ray simulation the defects of overcoming above-mentioned prior art to exist
Camera system, radiationless X ray can be carried out to arbitrary objects and simulate shooting, while the x-ray under any position can be realized
Shooting simulation.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of X ray simulates camera system, including X ray picture pick-up device, in addition to is installed on the X ray picture pick-up device
On position tracking device and simulation X source, the position tracking device and simulation X source are arranged above subject.
The position tracking device includes optical camera, magnetic tracking equipment or localization by ultrasonic equipment.
The simulation X source is the light source by visible analog x-ray projection direction, and the light source includes cross laser
Projecting cell or the analog light source combined by lighting source and diaphragm control module.
The X ray picture pick-up device includes radiography bed, column and former X source, the former X source, position tracking device and
Simulation X source is arranged above radiography bed by column.
The simulation X source is between subject and former X source.
Compared with prior art, the utility model has advantages below：
1) the utility model is on the basis of existing X ray picture pick-up device, installation site tracks of device and simulation X light sources,
Simulation x-ray camera system can be easily established, simulation X source is that one and x-ray source have similar irradiation projecting direction, and
Without any ionising radiation, therefore whole operation process is safe, and radiationless X ray simulation shooting can be achieved.
2) the utility model position tracking device can monitor locus of the subject relative to simulation X source in real time,
Caused X ray shooting analog image can be constantly updated, and this allows for operator arbitrarily to put the position of subject, realizes
Shooting exercise purpose under the conditions of different positions, it is possible to achieve the x-ray shooting simulation under any position.
3) the utility model can also simulate change conditions of exposure, produce different tube voltages, under tube current and time for exposure
Photography result, realize study x-ray shooting basic theory purpose.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the utility model
Implemented premised on technical scheme, give detailed embodiment and specific operating process, but guarantor of the present utility model
Shield scope is not limited to following embodiments.
As shown in figure 1, the present embodiment provides a kind of X ray simulation camera system, including X ray picture pick-up device, in addition to
The position tracking device 1 and simulation X source 2 being installed on X ray picture pick-up device, position tracking device 1 and simulation X source 2 are set
The top of subject 3 is placed in, the locus of subject 3 is updated using position tracking device 1, using simulating the mould of X source 2
Intend the projecting direction of X ray, calculate virtual X-ray and penetrate and decay caused by subject, so as to obtain digital X-ray shooting
Image.
Position tracking device 1 can be optical camera, so can conveniently observation subject change in location and
It is determined that the relative position of the x-ray source of simulation, the methods of magnetic tracking or localization by ultrasonic can also be selected in practice.
It is the light source by visible analog x-ray projection direction to simulate X source 2, can use cross laser projection list
Member, light source projects direction is on the one hand easily determined, the brightness of another aspect laser is high, is readily available higher signal to noise ratio.Equally,
The simulation of X source is it is also contemplated that take illumination bright light source plus the mode of diaphragm control to simulate the function of X source light concentrator.
X ray picture pick-up device includes radiography bed 4, column 5 and former X source 6, former X source 6, position tracking device 1 and simulation
X source 2 is arranged at the top of radiography bed 4 by column 5.
After position tracking device 1 and the simulation installation of X source 2, you can realize X ray simulation shooting, including following step
Suddenly：
1) projecting direction of simulation X ray and the X ray CT tomographic data of subject are determined.Mould in step 1)
Intend relative tertiary location relation of the projecting direction of X ray in simulation X source Position Tracking Systems device to obtain.The present embodiment
In, simulation X source uses cross laser projection unit, and position tracking device uses optical camera, according to video camera pin hole
Projection model determines the projecting direction of simulation X source.
Using regular object known to the spheroid or shape and size of known diameter, the cross laser being radiated on spheroid is handed over
The position of crunode in the picture can be extracted by the method for image procossing.Assuming that the focal length of camera of position tracking device
Given Deng inner parameter by demarcation or manufacturer, relative tertiary location of the spheroid in tracks of device unit can be calculated and closed
System.The projecting direction L of X source, namely the direction of cross wire are so simulated, can be obtained by the intersection calculations in image
.
2) relative position relation of subject and position tracking device is obtained, object coordinates system is tried to achieve and is filled with position tracking
Put the transformation matrix between coordinate system.
The relative position relation of subject and position tracking device is obtained by the mark of subject surface set, tool
Body is：Subject surface is provided with least three marks, is obtained from X ray CT tomographic data relative between each mark
Position relationship, by position tracking device coordinate system, the relative position calculated between subject and position tracking device is closed
System.As three marks can determine object coordinates system X ', Y ', Z '.By position tracking camera coordinate system XYZ, thing is calculated
Relative position relation between body and position tracking device, and represented by transformation matrix T, i.e., (X ', Y ', Z ', 1) '=T* (X,
Y,Z,1)’.Therefore direction of the analog light source in object coordinates system is T*L.
3) according to transformation matrix and the projecting direction of simulation X ray, simulation X ray is obtained in the direction of object coordinates system.
4) X ray is calculated in the attenuation law of the direction of object coordinates system and X ray according to simulation X ray and passes through object
Grey scale pixel value caused by body.
Ideally (in uniform dielectric), decay of single energy narrow beam X ray in material is represented by：
I=I0e-μx
I is the intensity of X ray after the homogeneous substance that penetration thickness is x, and μ is directly proportional to the density of material.X ray is in material
Remitted its fury in interior communication process, drawn by diffusive attenuation (energy scattered) and attenuation by absorption (interaction with material)
Rise.
I0Through voxel a1, a2, a3(or b1, b2, b3, or c1, c2, c3...) I after decay correspond to pixel on image
A (or b or c ...) gray value.Assuming that voxel thickness x is unit length, it is corresponding each on matrix from decay formula
The final gray value I of element is represented by：
I=I0e-(μ1+μ2+..+μn)
Briefly, the gray value of pixel is the function of attenuation coefficient sum of the X ray Jing Guo pixel.In actual conditions
In, incident ray can also be that perspective projection is irradiated, or non-homogenized beam x-ray source, or the X ray that energy can change.In addition,
, can be with the physical process caused by X-ray image such as decay caused by SIMULATED SCATTERING except decay caused by absorption.
5) attenuation coefficient provided according to X ray CT tomographic data and the projection property of virtual X source produce shot
The X ray shooting analog image of object.
After simulating the foundation of x-ray camera system, as long as the X ray CT tomographic data of subject can be obtained, it is possible to
X ray shooting simulation is carried out to it.The body of the camera parameters such as tube voltage and time for exposure or subject can be changed during experiment
Position, produce different X ray shooting analog images.
Claims (5)
1. a kind of X ray simulates camera system, including X ray picture pick-up device, it is characterised in that is also penetrated including being installed on the X
Position tracking device and simulation X source on line picture pick-up device, the position tracking device and simulation X source are arranged at object
Above body.
2. X ray according to claim 1 simulates camera system, it is characterised in that the position tracking device includes light
Learn video camera, magnetic tracking equipment or localization by ultrasonic equipment.
3. X ray according to claim 1 simulates camera system, it is characterised in that the simulation X source is by visible
The light source in optical analog x-ray projection direction, the light source include cross laser projection unit or controlled by lighting source and diaphragm
The analog light source that block combiner forms.
4. X ray according to claim 1 simulates camera system, it is characterised in that the X ray picture pick-up device includes taking the photograph
Shadow bed, column and former X source, the former X source, position tracking device and simulation X source are arranged on radiography bed by column
Side.
5. X ray according to claim 4 simulates camera system, it is characterised in that the simulation X source is located at object
Between body and former X source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047676.7U CN206726528U (en) | 2016-09-09 | 2016-09-09 | A kind of X ray simulates camera system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621047676.7U CN206726528U (en) | 2016-09-09 | 2016-09-09 | A kind of X ray simulates camera system |
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| Publication Number | Publication Date |
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| CN206726528U true CN206726528U (en) | 2017-12-08 |
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| CN201621047676.7U Expired - Fee Related CN206726528U (en) | 2016-09-09 | 2016-09-09 | A kind of X ray simulates camera system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504231A (en) * | 2020-05-06 | 2020-08-07 | 深圳小鱼儿科技有限公司 | Method and system for simulating coverage area of directional antenna by light |
-
2016
- 2016-09-09 CN CN201621047676.7U patent/CN206726528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504231A (en) * | 2020-05-06 | 2020-08-07 | 深圳小鱼儿科技有限公司 | Method and system for simulating coverage area of directional antenna by light |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20200909 |