CN108903961A - A kind of CBCT imaging method, storage medium and system - Google Patents
A kind of CBCT imaging method, storage medium and system Download PDFInfo
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- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Abstract
The invention discloses a kind of CBCT imaging method, storage medium and systems, wherein the method includes the steps：When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains the current CBCT threshold value of object CBCT threshold value to be measured and standard component；Object CBCT threshold value to be measured is calibrated according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component；Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.The present invention solves the problems, such as in the prior art because the fluctuation of equipment performance leads to the CBCT threshold value inaccuracy of shooting.
Description
Technical field
The present invention relates to CBCT technique for taking field more particularly to a kind of CBCT imaging methods, storage medium and system.
Background technique
CBCT, i.e. conical beam CT are that pencil-beam is thrown according to computer recombination fault image equipment, and principle is x-ray generator
It is annular DR (digital throwing is shone) according to body around throwing with lower quantity of X-rays X (usual tube current is at 10 milliamperes or so), then will
Around throwing, according to body, repeatedly (180 times -360 times) numbers are thrown after data obtained in " intersection " after photograph are rebuild in a computer in turn
Obtain 3-D image.The throwing that CBCT obtains data is entirely different according to principle and conventional sector scanning computed tomography, but later period computer weight
The algorithm principle of group has similar place.CBCT technology can obtain compared with the CT image being more clear and rebuild speed faster, but existing
In shooting process, since the stability of equipment is bad, the data fluctuations shot every time are larger, and numerical values recited is or not some CBCT
Together, it will it is of different sizes to influence the three-dimensional data finally rebuild, and then leads to not through the size of data（That is threshold value or door
Limit value）It goes to judge which is what kind of bone, is correct problem for which threshold value is unable to judge accurately, it is existing
The threshold value magnitude range for artificially probably removing judgement person CBCT can only be leaned in technology.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of CBCT imaging methods, storage medium
And system, it is intended to solve the problems, such as the threshold value inaccuracy of CBCT equipment shooting in the prior art.
Technical scheme is as follows：
A kind of CBCT imaging method, wherein including step：
When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains object CBCT to be measured
The current CBCT threshold value of threshold value and standard component；
School is carried out to object CBCT threshold value to be measured according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
It is quasi-；
Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
The CBCT imaging method, wherein the step is according to the current CBCT threshold value of standard component and consolidating for standard component
There is the difference between CBCT threshold value to calibrate object CBCT threshold value to be measured, including：
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and subtract
The difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and add
The absolute value of the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and keep
It is constant.
The CBCT imaging method, wherein carry out three according to the object CBCT threshold value to be measured after calibration in the step
Before tieing up reestablishment imaging, further include：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
The CBCT imaging method, wherein the standard component is formed from a resin.
The CBCT imaging method, wherein the standard component is cylindrical structure.
The CBCT imaging method, wherein the current CBCT threshold value of the quasi- part is the threshold value of axis direction.
A kind of storage medium is stored thereon with a plurality of instruction, wherein described instruction is suitble to be loaded and executed by processor：
When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains object CBCT to be measured
The current CBCT threshold value of threshold value and standard component；
School is carried out to object CBCT threshold value to be measured according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
It is quasi-；
Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
The storage medium, wherein described instruction is suitble to be loaded by processor and specifically executed：
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and subtract
The difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and add
The absolute value of the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and keep
It is constant.
The storage medium, wherein described instruction is suitble to be loaded by processor and specifically executed：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
A kind of CBCT imaging system, wherein including：
Standard component；
Processor is adapted for carrying out each instruction；And
Storage medium, is suitable for storing a plurality of instruction, and the described instruction is suitble to be loaded by processor and executed as described above
CBCT imaging method.
Beneficial effect：The present invention is shot by one standard component of setting when object or human body carry out CBCT shooting simultaneously
The standard component, the deviation between the current CBCT threshold value and its intrinsic CBCT threshold value of standard component obtained according to shooting come adjust to
The CBCT threshold value of object is surveyed, to realize calibration CBCT threshold value, is solved because the fluctuation of equipment performance leads to the CBCT of shooting
The problem of threshold value inaccuracy.
Detailed description of the invention
Fig. 1 is the flow chart of CBCT imaging method preferred embodiment of the present invention.
Fig. 2 is the structural schematic diagram of CBCT imaging system of the present invention.
Specific embodiment
The present invention provides a kind of CBCT imaging method, storage medium and system, for make the purpose of the present invention, technical solution and
Effect is clearer, clear, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein
It is only used to explain the present invention, be not intended to limit the present invention.
A kind of CBCT imaging method, as shown in Figure 1, including the following steps：
S1, when shooting object CBCT to be measured, while shoot an intrinsic CBCT threshold value known to standard component, obtain object to be measured
The current CBCT threshold value of CBCT threshold value and standard component；
S2, object CBCT threshold value to be measured is carried out according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
Calibration；
S3, three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
In the present invention, to determinand part to be measured（Either human body or object）While carrying out CBCT shooting, shooting
Standard component, is acted on using the reference of standard component, and all CBCT numerical value that shooting obtains are calibrated to standard state, also can
By the CBCT threshold value after calibration and 3-dimensional image is accurately reconstructed according to threshold value standard.
In the step S1, treated simultaneously under same environment using identical equipment survey object to be measured and standard component into
Row CBCT shooting, so that the current CBCT threshold value of object CBCT threshold value to be measured and standard component is obtained, and standard component is intrinsic
CBCT threshold value（That is standard CBCT threshold value）It is known that the intrinsic CBCT threshold value refer to it is mutually unified with the production of threshold value standard at one
CBCT threshold value under standard state, concept are similar to the gas volume of normal atmosphere pressure, are not changed with actual environment state
Become, thus the difference of the current CBCT threshold value obtained under itself and actual environment can then indicate deviation between the two.
Preferably, the standard component in the CBCT imaging method is formed from a resin, and it is 1000 that threshold value, which is arranged,.
More preferably, the cylindrical resin structure that the standard component is high 10cm, diameter is 1cm.
Simultaneously in order to guarantee that standard is unified, in the CBCT imaging method, the current CBCT threshold of the quasi- part is set
Value is the threshold value of its axis direction, namely measures the CBCT threshold value of its axis direction, and correspondingly, intrinsic threshold value is also that this is rectangular
CBCT threshold value.
In the step S2, pass through the difference between the current CBCT threshold value of standard component obtained and its intrinsic CBCT threshold value
Value is increased and decreased calibration to the object CBCT threshold value to be measured of acquisition, obtains the standard with the object to be measured under threshold value standard state
In other words CBCT threshold value is that CBCT threshold value obtained is adjusted to ring identical with the intrinsic CBCT threshold value of standard component
Numerical value under the state of border.
Specifically, the step S2 includes：
S21, when the current CBCT threshold value of standard be greater than standard component intrinsic CBCT threshold value when, then handle object CBCT to be measured
Threshold value subtracts the difference；
S22, when the current CBCT threshold value of standard be less than standard component intrinsic CBCT threshold value when, then handle object CBCT threshold value to be measured
In addition the absolute value of the difference；
S23, when the current CBCT threshold value of standard be equal to standard component intrinsic CBCT threshold value when, then handle object CBCT threshold value to be measured
It remains unchanged.
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, illustrate that the CBCT threshold value measured is serious
Real CBCT threshold value is bigger than normal, needs to do subtraction process, that is, controls object CBCT threshold value to be measured and subtract the difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, illustrate that the CBCT threshold value measured is truer
CBCT threshold value is less than normal, needs to do addition process, that is, controls object CBCT threshold value to be measured plus the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, illustrate the CBCT threshold value measured and true
CBCT threshold value is identical, and current ambient conditions and standard state always, without calibrating to the CBCT threshold value measured, thus control
Object CBCT threshold value to be measured remains unchanged.
Preferably, in view of the presence of internal highdensity developing material, such as meeting in the patient's body having or oral cavity
There is the presence such as dummy such as baking-ceramic tooth, and scattering phenomenon can occur at CBCT in dummy, and then cause image unintelligible, thus
It needs just obtain a final clearly image by scratching except the scattering region carries out three-dimensional imaging.The scattering of these oral cavities is existing
The value that CBCT threshold value is fixation, such as 3071 are preced with as being concentrated mainly on metal inner crown material, in metal, therefore than this numerical value
It is small, and it is preced in metal the data of all scatterings of horizontally data（Scattering is only possible to be horizontal direction scattering, and now
The scanning theory of equipment is related）, these data can remove all, remove scattering region with button to obtain clearly image.But
It is, it is same because the CBCT threshold value that existing CBCT equipment directly obtains is not sufficiently stable accurately, directly with such CBCT threshold value
Scattering region can not be accurately detained for standard, thus, more preferably, following steps can be increased before step S3：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
Because the object CBCT threshold value to be measured after calibration has been actual level threshold value, thus can be according to the CBCT threshold
It is worth the corresponding scattering region of the corresponding dummy of control selections, then removes its accurate scratches, to eliminate the scattering pair of dummy
The image of three-dimensional imaging.
It is to be measured because the CBCT threshold data after calibration eliminates the influence of equipment performance fluctuation in the step S3
The standard CBCT threshold value of object, thus three-dimensional shadow can be reconstructed accurately with the object CBCT threshold data to be measured after calibrating
Picture.
Based on the above method, the present invention also provides a kind of storage mediums, are stored thereon with a plurality of instruction, wherein described
Instruction is suitble to be loaded and executed by processor：
When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains object CBCT to be measured
The current CBCT threshold value of threshold value and standard component；
School is carried out to object CBCT threshold value to be measured according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
It is quasi-；
Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
The storage medium, wherein described instruction is suitble to be loaded by processor and specifically executed：
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and subtract
The difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and add
The absolute value of the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and keep
It is constant.
The storage medium, wherein described instruction is suitble to be loaded by processor and specifically executed：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
Based on the above method, the present invention also provides a kind of CBCT imaging systems, wherein as shown in Fig. 2, including：
Standard component 100；
Processor 200 is adapted for carrying out each instruction；And
Storage medium 300, is suitable for storing a plurality of instruction, and the described instruction is suitble to be loaded by processor and executed as described above
CBCT imaging method.
It has been carried out in the above-mentioned methods about the technical detail and benefit of above-mentioned CBCT imaging system and storage medium in detail
Thin to illustrate, details are not described herein again.
In conclusion CBCT imaging method provided by the invention, by the way that a standard component is arranged, object or human body into
When row CBCT is shot, while the standard component is shot, according to the current CBCT threshold value and its intrinsic CBCT of the standard component that shooting obtains
Deviation between threshold value adjusts the CBCT threshold value of object to be measured, to realize calibration CBCT threshold value, solves because of equipment
The fluctuation of energy and shooting environmental leads to the problem of the CBCT threshold value inaccuracy of shooting, and then leads to not accurately carry out three-dimensional imaging
The problem of.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of CBCT imaging method, which is characterized in that including step：
When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains object CBCT to be measured
The current CBCT threshold value of threshold value and standard component；
School is carried out to object CBCT threshold value to be measured according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
It is quasi-；
Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
2. CBCT imaging method according to claim 1, which is characterized in that the step is according to the current CBCT of standard component
Difference between threshold value and the intrinsic CBCT threshold value of standard component calibrates object CBCT threshold value to be measured, including：
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and subtract
The difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and add
The absolute value of the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and keep
It is constant.
3. CBCT imaging method according to claim 2, which is characterized in that in the step according to the determinand after calibration
Before part CBCT threshold value carries out three dimensional reconstructive CT, further include：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
4. CBCT imaging method according to claim 1, which is characterized in that the standard component is formed from a resin.
5. CBCT imaging method according to claim 1, which is characterized in that the standard component is cylindrical structure.
6. CBCT imaging method according to claim 5, which is characterized in that the current CBCT threshold value of the quasi- part is axis
The threshold value in direction.
7. a kind of storage medium is stored thereon with a plurality of instruction, which is characterized in that described instruction is suitble to be loaded and held by processor
Row：
When shooting object CBCT to be measured, while standard component known to an intrinsic CBCT threshold value is shot, obtains object CBCT to be measured
The current CBCT threshold value of threshold value and standard component；
School is carried out to object CBCT threshold value to be measured according to the difference between the current CBCT threshold value and intrinsic CBCT threshold value of standard component
It is quasi-；
Three dimensional reconstructive CT is carried out according to the object CBCT threshold value to be measured after calibration.
8. storage medium according to claim 7, which is characterized in that described instruction is suitble to be loaded by processor and specifically held
Row：
When the current CBCT threshold value of standard is greater than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and subtract
The difference；
When the current CBCT threshold value of standard is less than the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and add
The absolute value of the difference；
When the current CBCT threshold value of standard is equal to the intrinsic CBCT threshold value of standard component, then handles object CBCT threshold value to be measured and keep
It is constant.
9. storage medium according to claim 7, which is characterized in that described instruction is suitble to be loaded by processor and specifically held
Row：
With the threshold value selective scattering region object CBCT to be measured after calibrating and remove the CBCT threshold value of the scattering region.
10. a kind of CBCT imaging system, which is characterized in that including：
Standard component；
Processor is adapted for carrying out each instruction；And
Storage medium, is suitable for storing a plurality of instruction, and the described instruction is suitble to be loaded by processor and execute such as claim 1 ~ 6
Any CBCT imaging method.
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Application publication date: 20181130 |