CN205994511U - Imaging performance tests module - Google Patents
Imaging performance tests module Download PDFInfo
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- CN205994511U CN205994511U CN201620623877.0U CN201620623877U CN205994511U CN 205994511 U CN205994511 U CN 205994511U CN 201620623877 U CN201620623877 U CN 201620623877U CN 205994511 U CN205994511 U CN 205994511U
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Abstract
The utility model discloses a kind of imaging performance tests module, including being arranged at, detection noise, artifact, conforming first module, the second module, three module, the 4th module and the 5th module for detection image geometry character and thickness for detecting low contrast for detecting metal artifacts and CT value for detecting high-contrast are used on bracket, described first module, described second module, described three module, described 4th module and described 5th module are layered on top of each other arrangement.Composition structure is compacter, compact, and the function of module is more complete, can more comprehensively and science assessment CBCT system diagram as image quality, test result is more reliable, more accurately the complete performance of reflection CBCT system image quality.
Description
Technical field
This utility model is related to armarium detection technique field, and particularly a kind of imaging performance tests module.
Background technology
Conebeam computed tomography imaging technology (Cone-Beam Computed Tomography, CBCT) is extensively applied
In the field of medical diagnosiss and treatment, especially oral medical diagnoses most important supplementary meanss, can be used for Dental implantion, periodontal disease
The field such as diagnosis and the assessment of jaw portion.The quality of image directly can affect diagnosis effect, for evaluating CBCT picture quality
Parameter has signal noise ratio (snr) of image, spatial resolution, density resolution, image intensity value uniformity etc., and the measurement of these parameters will
Obtained by means of test die body.At present, medical industry standard " YY/T 0795-2010 oral cavity X-ray Digital tomography
Recommend in device-specific technical conditions " " DIGIDENT dentistry test body mould ", this die body can be by measuring above-mentioned parameter
CBCT image property is made with accurate evaluation.But, this die body does not possess the module of measurement thickness, for evaluating density
The module of resolution and spatial resolution is not perfect；Meanwhile, metal artifacts often occur also cannot be carried out standard in diagnosis
Really measure, thus result in existing cone-beam CT-systems imaging test body mould cannot comprehensively evaluation image quality it is impossible to reflection
The complete performance of CBCT system image quality, causes testing result inaccurate.
Content of the invention
Based on this, this utility model is to overcome the defect of prior art, provides a kind of multiple functional, measurement parameter more
Perfect, measurement result is more accurately and structure simple imaging performance test module.
Its technical scheme is as follows：
A kind of imaging performance tests module, is used for detection noise, artifact, conforming first mould including being arranged on bracket
Block, for detecting the second module of high-contrast, for detecting the three module of metal artifacts and CT value, for detecting low contrast
4th module of degree and the 5th module for detection image geometry character and thickness, described first module, described second module, institute
State three module, described 4th module and described 5th module and be layered on top of each other arrangement.
Wherein in an embodiment, the first shell that described first module includes the first test body and is provided with accommodating chamber
Body, described first test body is filled in described accommodating chamber.
Wherein in an embodiment, described second module includes the second test body, the second housing and may be contained within described
To assembly and the second line to assembly, described First Line intersects to assembly First Line in second shell body to assembly and described second line
Arrangement, described second test body is arranged in described second shell body and is located at described First Line to assembly and described second line pair
The sidepiece at the intersecting center of assembly.
Wherein in an embodiment, described three module includes the 3rd housing and the first sub-module, described first point of mould
Block includes at least two first cylindrical chamber being arranged in described 3rd housing, and the center of two described first cylindrical chamber is even
Line forms the first camber line.
Wherein in an embodiment, described three module also includes the second sub-module, described second sub-module include to
Few two the second cylindrical chamber, the line of centres of two described second cylindrical chamber forms the second camber line, and described second camber line
Positioned opposite with described first camber line.
Wherein in an embodiment, described 4th module includes the 4th housing and is arranged in described 4th housing
Density resolution test suite, described density resolution test suite includes the multiple of the center arrangement around described 4th housing
Density resolution test cell part, the diameter of multiple described density resolution test cell parts is in increasing trend, and multiple described
The line of centres of density resolution test cell part forms the 3rd camber line.
Wherein in an embodiment, described 4th module includes three described density resolution test suites, three institutes
State density resolution test suite all along described 4th housing center ring around arrangement.
Wherein in an embodiment, described 5th module includes the 5th housing and the 3rd sub-module, described 3rd point of mould
Block includes at least three the 3rd cylindrical chamber being arranged on described 5th housing, and three described 3rd cylindrical chamber are triangular in shape
Arrangement.
Wherein in an embodiment, described 5th module also includes the 4th sub-module, and described 4th sub-module includes setting
Be placed in the described 5th in housing and interlaced arrangement two the 3rd test bodies, the angle of described 3rd test body and horizontal direction
For 45 degree.
The beneficial effects of the utility model are：
Above-mentioned imaging performance test module pass through arranged stacked on bracket be used for detection noise, artifact, conforming the
One module, for detect high-contrast the second module, for detect the three module of metal artifacts and CT value, be used for detecting low
4th module of contrast and the 5th module for detection image geometry character and thickness, not only can make composition structure more
Compact, compact and the function of module is more complete it is adaptable to different oral cavity CT system, can more comprehensively and science
The image quality of assessment CBCT system diagram picture, test result is more reliable.
Brief description
Fig. 1 is the structural representation of the imaging performance test module described in this utility model embodiment；
Fig. 2 is the structural representation of the second module described in this utility model embodiment；
Fig. 3 is the structural representation of the three module described in this utility model embodiment；
Fig. 4 is the structural representation of the 4th module described in this utility model embodiment；
Fig. 5 is the structural representation of the 5th module described in this utility model embodiment.
Description of reference numerals：
100th, the first module, the 120, first test body, the 140, first housing, the 200, second module, the 220, second test body,
240th, the second housing, 260, First Line to assembly, the 280, second line to assembly, 300, three module, the 320, the 3rd housing, 340,
First sub-module, the 342, first cylindrical chamber, the 360, second sub-module, the 362, second cylindrical chamber, the 400, the 4th module, 420,
4th housing, 440, density resolution test suite, 442, density resolution test cell part, the 500, the 5th module, 520,
Five housings, the 540, the 3rd sub-module, the 542, the 3rd cylindrical chamber, the 560, the 4th sub-module, the 562, the 3rd test body.
Specific embodiment
Below embodiment of the present utility model is described in detail：
As shown in figure 1, a kind of imaging performance tests module, include being arranged on bracket and be used for detection noise, artifact, unanimously
First module 100 of property, for detecting the second module 200 of high-contrast, for detecting the 3rd mould of metal artifacts and CT value
Block 300, for detecting the 4th module 400 and the 5th module 500 for detection image geometry character and thickness of low contrast, institute
State the first module 100, described second module 200, described three module 300, described 4th module 400 and described 5th module
500 are layered on top of each other arrangement.
Above-mentioned imaging performance test module pass through arranged stacked on bracket be used for detection noise, artifact, conforming the
One module 100, for detecting the second module 200 of high-contrast, for detecting the three module 300 of metal artifacts and CT value,
For detecting the 4th module 400 and the 5th module 500 for detection image geometry character and thickness of low contrast, not only can
So that composition structure is compacter, compact, and and the function of module is more complete it is adaptable to different oral cavity CT system, permissible
More comprehensively and science assessment CBCT system diagram picture image quality, test result is more reliably.
In the present embodiment, the shape of preferably above-mentioned five modules is cylinder, and five cylindrical overall dimensions
Size is identical, and diameter is 100mm, is not only convenient for using, and outward appearance is more beautiful, generous, certainly in other embodiments
Can also be other shapes such as example square, oval.In this preferred embodiment, above-mentioned five modules are all securable to
On bracket, bracket is correspondingly arranged on pallet, pallet can be around carriage turns, and five modules can be individually fixed on pallet, also may be used
From top to bottom arranged stacked is on pallet, so can more preferable utilization space, reduce the size taking up room so that structure more
Step up to gather.When actually used, selected pallet can be positioned over x-ray source and detector centre position, thus carrying out Cone-Beam CT
The detection of the corresponding performance of system, simple to operate, reliable operation.
Described first module 100 includes the first test body 120 and the first housing 140 being provided with accommodating chamber, and described first
Test body 120 is filled in described accommodating chamber.In the present embodiment, described first housing 140 adopts low density material to make, example
As polymethyl methacrylate (PMMA) etc.；Additionally, described first test body 120 is water, water is filled in described first housing 140
Accommodating chamber in, cone-beam CT system X-ray penetrates described first module 100, the image after being rebuild, and calculates and adopts on image
The gray value of sampling point is simultaneously compared, and then can be used to pass judgment on the uniformity of image.
As shown in Fig. 2 additionally, described second module 200 includes the second test body 220, the second housing 240 and is respectively provided with
, to assembly 260 and the second line to assembly 280, described First Line is to assembly 260 and institute for First Line in described second housing 240
State the second line and arrangement is intersected to assembly 280, described second test body 220 is arranged in described second housing 240 and is located at described
The sidepiece at First Line intersecting center to assembly 280 to assembly 260 and described second line.
Preferred in an embodiment, described First Line to assembly 260 and described second line to assembly 280 by multiple highly dense
Degree tinsel (line to) composition, multiple lines in the trend being incremented by arrangement, two groups of lines to intersecting arrangement, and intersecting center with described
The center superposition of the second housing 240, thus can arrange more lines pair, to improve space on area tries one's best compact housing
The fine level of resolution, thus improve accuracy of detection.Additionally, described First Line is 1.0LP/mm～1.5LP/ to assembly 260
Mm, described second line is 1.6LP/mm～2.0LP/mm to assembly 280, and the length of line pair is 10mm, and depth is 10mm.Further
, described second test body 220 is the tungsten ball of a diameter of 0.3mm, and the quantity of tungsten ball is two, and two tungsten balls are preferably flush-mounted in institute
State the both sides at the intersecting center to assembly 260 and described second line to assembly 280 for the First Line, for carrying out the survey of spatial resolution
Amount.Tungsten ball by pair-line method (for detecting the subjective method of spatial resolution), and can be utilized, by adjusting by said structure
The objective method that transfer function method processed calculates spatial resolution combines, and thus to carry out a step and to improve described second module 200
Carry out detection degree of accuracy and the range of spatial resolution.
As shown in figure 3, in a further embodiment, described three module 300 includes the 3rd housing 320 and first point of mould
Block 340, described first sub-module 340 includes at least two first cylindrical chamber 342 being arranged on described 3rd housing 320,
The line of centres of two described first cylindrical chamber 342 forms the first camber line.
Wherein, described first sub-module 340 is metal artifacts module, for evaluating cone-beam CT system, metal artifacts is gone
Except effect.Described 3rd housing 320 equally adopts low density material to make, such as polymethyl methacrylate (PMMA) etc.；This
Outward, housing is preferably diameter 100mm, the highly cylinder for 20mm, the number of described first cylindrical chamber 342 in the present embodiment
Measure as 10, and all run through described 3rd housing 320, the line of centres of 10 described first cylindrical chamber 342 forms the first arc
Line, not only can arrange more described first cylindrical chamber 342 in limited big small shell, can also reduce described 3rd shell
The size of body 320, so that the 3rd housing 320 is more gently little, can also preferably simulate the shape of human oral cavity so that examining simultaneously
Survey die body more closing to reality situation, improve the accuracy of detection.Replacing titanium rod can be plugged in first cylindrical chamber 342 simultaneously
Or PMMA rod, in order to simulate the situation of metal artifacts, make testing result more accurately at the same time it can also be conveniently replaceable, use
Extremely convenient.Described first cylindrical chamber 342 of varying number, in actually used, can be set according to actually used situation.
Further on the basis of above-described embodiment, described three module 300 also includes the second sub-module 360, described
Second sub-module 360 includes at least two second cylindrical chamber 362, the line of centres shape of two described second cylindrical chamber 362
Become the second camber line, and described second camber line is positioned opposite with described first camber line.
Described second sub-module 360 is CT value module, and in the present embodiment, it specifically includes the cylinder of 5 curved arrangements
Body, this five cylinders are arranged at the inside of described 3rd housing 320, and are separately filled with 5 kinds of different human bodies inside it
Equivalent organization material, can fill such as water, air etc. respectively.When X-ray passes through different equivalent organization materials, material is close
Degree coefficient is high, then the more, CT value is just big, and the CT value otherwise obtaining is just less for the amount of x-ray absorbing, thus can more comprehensive with
The reliable CT value measuring image.Additionally, five cylindrical lines of centres form the second camber line, so that arrangement is more
Step up to gather, take less space so that more cylinders can be arranged in limited housing.
As shown in figure 4, additionally, described 4th module 400 includes the 4th housing 420 and is arranged at described 4th housing 420
Interior density resolution test suite 440, described density resolution test suite 440 is included around described 4th housing 420
Multiple density resolution test cell parts 442 of center arrangement, the diameter of multiple described density resolution test cell parts 442 is in
Increasing trend, and the line of centres of multiple described density resolution test cell part 442 forms the 3rd camber line.
The quantity of the part of density resolution test cell described in the present embodiment 442 is 6 cylinders, and 6 cylindrical straight
Footpath is in being gradually incremented by the range of 1.0～6.0mm, and 6 cylinders all around described 4th housing 420 center ring around row
Row, and inside it, it is separately filled with different human body equivalent organization materials, such as water, air etc. can be filled.Further,
Described three module 300 includes three described density resolution test suites 440, three described density resolution test suites
440 all along described 4th housing 420 center ring around arrangement.Three described density resolution test suite 440 mutual cincture institutes
State the center arrangement of the 4th housing 420, can be not only used for the measurement of density resolution, and because arrangement is concentrated, Ke Yigeng
The good cone-beam imaging being applied to different FOV (scanner field), improves and is suitable for range.
As shown in figure 5, wherein in an embodiment, described 5th module 500 includes the 5th housing 520 and the 3rd point of mould
Block 540, described 3rd sub-module 540 includes at least three the 3rd cylindrical chamber 542 being arranged on described 5th housing 520,
Three described 3rd cylindrical chamber 542 are triangularly arranged.In the present embodiment, three described 3rd cylindrical chamber 542 are permissible
Constitute arbitrary triangle, preferably equilateral triangle, further, the quantity of described 3rd cylindrical chamber 542 is four, such that it is able to
Constitute square, the image being formed after X-ray is compared with above-mentioned shape, can more intuitively judge Cone-Beam CT system
The geometric error of the image of system.
Additionally, described 5th module 500 also includes the 4th sub-module 560, described 4th sub-module 560 includes being arranged at institute
State in the 5th housing 520 and interlaced arrangement two the 3rd test bodies 562, the folder of described 3rd test body 562 and horizontal direction
Angle is 45 degree.The preferably a diameter of 0.5mm of described 3rd test body 562, length is the tungsten filament of 25mm, and two tungsten filaments are positioned opposite,
And all tilt 45 degree in the horizontal direction, observe from side, both are in intersection, this arrangement not only can reduce scattering
Line, can also obtain very high picture contrast, thus ensureing the accurate of measurement result.Meanwhile, image is observed by calculating
On the length of oblique line can get concrete thickness value, calculation is simple, and data acquisition is reliable.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, some deformation can also be made and improve, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (9)
1. a kind of imaging performance test module is used for detection noise, artifact, consistent it is characterised in that including being arranged on bracket
First module of property, for detecting the second module of high-contrast, for detecting the three module of metal artifacts and CT value, is used for
4th module of detection low contrast and the 5th module for detection image geometry character and thickness, described first module, described
Second module, described three module, described 4th module and described 5th module are layered on top of each other arrangement.
2. imaging performance test module according to claim 1 is it is characterised in that described first module includes the first test
Body and the first housing being provided with accommodating chamber, described first test body is filled in described accommodating chamber.
3. imaging performance test module according to claim 1 is it is characterised in that described second module includes the second test
Body, the second housing and may be contained within First Line in described second shell body to assembly and the second line to assembly, described First Line pair
Assembly and described second line intersect arrangement to assembly, and described second test body is arranged in described second shell body and is located at described
The sidepiece at First Line intersecting center to assembly to assembly and described second line.
4. imaging performance test module according to claim 1 is it is characterised in that described three module includes the 3rd housing
With the first sub-module, described first sub-module includes at least two first cylindrical chamber being arranged in described 3rd housing, and two
The line of centres of individual described first cylindrical chamber forms the first camber line.
5. imaging performance test module according to claim 4 is it is characterised in that described three module also includes second point
Module, described second sub-module includes at least two second cylindrical chamber, the line of centres shape of two described second cylindrical chamber
Become the second camber line, and described second camber line is positioned opposite with described first camber line.
6. imaging performance test module according to claim 1 is it is characterised in that described 4th module includes the 4th shell
Body and be arranged at density resolution test suite in described 4th housing, described density resolution test suite include around
Multiple density resolution test cell parts of the center arrangement of described 4th housing, multiple described density resolution test cell parts
Diameter be in increasing trend, and multiple described density resolution test cell part the line of centres formed the 3rd camber line.
7. imaging performance test module according to claim 6 is it is characterised in that described 4th module is included described in three
Density resolution test suite, three described density resolution test suites all along described 4th housing center ring around arrangement.
8. imaging performance test module according to claim 1 is it is characterised in that described 5th module includes the 5th housing
With the 3rd sub-module, described 3rd sub-module includes at least three the 3rd cylindrical chamber being arranged on described 5th housing, and three
Individual described 3rd cylindrical chamber is triangularly arranged.
9. imaging performance test module according to claim 8 is it is characterised in that described 5th module also includes the 4th point
Module, described 4th sub-module include being arranged in described 5th housing and interlaced arrangement two the 3rd test bodies, described the
Three test bodies are 45 degree with the angle of horizontal direction.
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| CN201620623877.0U CN205994511U (en) | 2016-06-20 | 2016-06-20 | Imaging performance tests module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107348968A (en) * | 2017-08-07 | 2017-11-17 | 泰山医学院 | A kind of general high-precision body mould of conical beam CT |
| CN107753050A (en) * | 2017-10-27 | 2018-03-06 | 厦门市领汇医疗科技有限公司 | A kind of synthesis die body for being used to test CBS CT machines performances and picture quality |
| CN108378863A (en) * | 2018-03-12 | 2018-08-10 | 北京朗视仪器有限公司 | A kind of CBCT imaging performances test body mould |
| CN110179484A (en) * | 2019-05-16 | 2019-08-30 | 复旦大学 | CT performance detection die body and its test method for automatic tube current modulating mode |
| CN111481220A (en) * | 2019-12-25 | 2020-08-04 | 安徽数研智能科技有限公司 | Flexible die body suitable for performance evaluation of magnetic resonance and CT imaging equipment |
-
2016
- 2016-06-20 CN CN201620623877.0U patent/CN205994511U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107348968A (en) * | 2017-08-07 | 2017-11-17 | 泰山医学院 | A kind of general high-precision body mould of conical beam CT |
| CN107348968B (en) * | 2017-08-07 | 2023-08-11 | 泰山医学院 | High-precision phantom universal for cone beam CT |
| CN107753050A (en) * | 2017-10-27 | 2018-03-06 | 厦门市领汇医疗科技有限公司 | A kind of synthesis die body for being used to test CBS CT machines performances and picture quality |
| CN107753050B (en) * | 2017-10-27 | 2021-12-24 | 厦门市领汇医疗科技有限公司 | Comprehensive die body for testing performance and image quality of CBS-CT machine |
| CN108378863A (en) * | 2018-03-12 | 2018-08-10 | 北京朗视仪器有限公司 | A kind of CBCT imaging performances test body mould |
| CN110179484A (en) * | 2019-05-16 | 2019-08-30 | 复旦大学 | CT performance detection die body and its test method for automatic tube current modulating mode |
| CN111481220A (en) * | 2019-12-25 | 2020-08-04 | 安徽数研智能科技有限公司 | Flexible die body suitable for performance evaluation of magnetic resonance and CT imaging equipment |
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