CN109480902A - A kind of imitated NDVI and its method measuring B ultrasound instrument pitching resolving power - Google Patents
A kind of imitated NDVI and its method measuring B ultrasound instrument pitching resolving power Download PDFInfo
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- CN109480902A CN109480902A CN201811512348.3A CN201811512348A CN109480902A CN 109480902 A CN109480902 A CN 109480902A CN 201811512348 A CN201811512348 A CN 201811512348A CN 109480902 A CN109480902 A CN 109480902A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/58—Testing, adjusting or calibrating the diagnostic device
- A61B8/587—Calibration phantoms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
Abstract
The invention discloses a kind of ultrasonic acoustic beam pitching resolution measurement imitated NDVIs, comprising: body mould shell, axial target line-group, target lamella and imitative organization material；Wherein, body mould shell includes sound window, top sink frame, front panel, rear panel, Left-Hand Panel, right panel, bottom panel and pedestal；Front panel and rear panel are in mirror symmetry, are provided with first axis target line aperture group on the left of front panel along longitudinal direction, and rear panel and front panel symmetric position are provided with the second axial target line aperture group along longitudinal direction；Target lamella includes scattering target piece backboard and scattering layer.A method of measurement B ultrasound instrument pitching resolving power, which is characterized in that the method includes one of face target methods and line target method or a variety of.By the way that target lamella is arranged in body mould, using face target method measures the pitching resolving power of ultrasonic acoustic beam, pitching resolution measurement is carried out by using the investigation depth of axial target line-group measurement ultrasonic probe, and using line target method, the pitching obtained with face target method measurement is differentiated force value and checked.
Description
Technical field
The present invention relates to belong to medical instrument quality examination field more particularly to a kind of measurement B ultrasound instrument pitching resolving power
Imitated NDVI and its method.
Background technique
B ultrasound and X-CT, magnetic resonance imaging, nuclear medicine are four big diagnostic imaging technologies of the present age most practical value,
And for popularity, B ultrasound is then first of residence.Especially under the actual conditions in China, B ultrasound technology is used not only for a variety of
The routine diagnosis of illness, and it is commonly used family planning, aristogenesis and healthy reproduction field.Their performance, quality are such as
What, is not only related to the economic benefit of producer and hospital, more influences health and good fortune that the entire Chinese nation includes descendants
Happiness.Exactly in light of this situation, national authorities formulate and have issued corresponding technical standard, carry out lifelong matter as to it
Legal the following of amount supervision.
Clinically, doctor is that the information provided according to ultrasonic scanning ultrasonogram makes diagnosis, therefore picture quality is recognized
Primary factor whether to be measurement B ultrasound product quality superiority and inferiority and judging that its is working properly effective.According to international consensus, characterization
The technical indicator of B ultrasound performance includes blind area, investigation depth, azimuthal resolution, lateral resolution, pitching resolving power, contrast point
Distinguish power and display and the geometric error of measurement etc..And it can develop, produce, sell and use, repair and legal management etc. is each
Objective, rapid, true to nature, quantitative assessment material technology means are made to B ultrasound equipment performance quality in link, it is super to have imitative tissue only
Sound body mould.From clinical effectiveness, the most important requirement to ultrasonic diagnostic equipment two dimension gray scale imaging is 3 points, that is, is detected
Depth, image clearly, measured value are accurate.The technical indicator for describing this three performances is investigation depth, spatial resolution and geometry respectively
Measurement error.Wherein, spatial resolution includes azimuthal resolution, lateral resolution and pitching resolving power.Pitching resolving power is determined
Justice is " at the designated depth of body mould, perpendicular to the thickness for the imitative organization material for showing acoustic intelligence in scan plane direction ", and
The dedicated means of indispensability for detecting this index are then pitching resolving power body moulds.
The pitching resolving power of B ultrasound instrument and the dedicated imitated NDVI of this index is detected, is with three-dimensional (3D) imaging
The generation and development of technology and attract attention and pay attention to.The core of pitching resolving power body mould is to keep pitching resolving power straight
It sees, the dedicated target of image display.According to the imagination in the related technological document of International Electrotechnical Commission (IEC), which is answered
This be a backscatter level be higher than background imitate organization material, thickness be no more than 0.4mm, it is oblique be embedded in the velocity of sound be 1540 ±
10m/s, attenuation coefficient slope be (0.7 ± 0.05) dB/ (cmMHz) imitative organization material in thin layer, belong to " transmission-type dissipate
It shoots at the target ".However, the satisfactory Hydrogels of acoustic characteristic imitate the thin layer that 0.4mm can not be made because intensity limits for organization material,
Add scatterer to make by base-material of rubber, that is, allow to accomplish so thin, but acoustic characteristic is unable to satisfy requirement.Furthermore such as
Fixed this thin layer installation is also a problem.Due to above, such external body mould product is not able to achieve in IEC file
Imagination.
Summary of the invention
It is an object of the invention to solve defect existing for current technology.
In order to achieve the above objectives, on the one hand, a kind of imitated NDVI for measuring B ultrasound instrument pitching resolving power, comprising: body mould
Shell, axial target line-group, target lamella and imitative organization material；Wherein,
Body mould shell includes sound window, top sink frame, front panel, rear panel, Left-Hand Panel, right panel, bottom panel
And pedestal；Wherein, front panel and rear panel are in mirror symmetry, are provided with first axis target line aperture group along longitudinal direction on the left of front panel,
First axis target line aperture group includes at least two aperture, and rear panel and front panel symmetric position are provided with the second axial target along longitudinal direction
Line aperture group, the second axial target line aperture group includes at least two aperture；Bottom panel includes at least two aperture, from left to right according to
Secondary is the first base apertures and the second base apertures；
Axial target line-group includes at least 2 target lines, and one end of every target line passes through 1 of first axis target line aperture group admittedly
Hole is fixed, and the other end is fixed by the hole of the horizontal symmetrical of the second axial target line aperture group, and a target line is only fixed in each hole
One end；
Target lamella includes scattering target piece backboard and scattering layer.
Preferably, each opening diameter in first axis target line aperture group and the second axial target line aperture group is more than or equal to
0.1 ㎜, the centre distance between two holes are 10 ㎜；Every target linear diameter in axial target line-group is less than or equal to 0.3 ㎜, and material is
Nylon wire, each aperture that every target line passes through respectively in first axis target line aperture group and the second axial target line aperture group run through
Imitated NDVI, target line both ends are separately fixed at the outside side of front panel and rear panel, every target line pulling force having the same
So that nylon target line-group is uniformly tightened.
Preferably, anti-skidding at least provided with one inside front panel and/or inside rear panel and/or inside Left-Hand Panel
Slot；Non-slip groove prevents its sliding for fixed imitative organization material；The first target corresponding with target slice position is decorated on the outside of front panel
The second target piece bearing mark line corresponding with target slice position is decorated in piece bearing mark line, rear panel outside.
Preferably, sink frame in top is bonded by organic glass item, or by acrylonitrile-butadiene-styrene (ABS) ABS plastic
It is an integrally-molded, for holding liquid coupling medium.
Preferably, sound window is the polyester film that thickness is less than or equal to 100 μm, and line target method bearing mark line is decorated in left side,
Line target method bearing mark line and front panel angle clockwise are θ2。
Preferably, filling channel of first base apertures as imitative organization material；At least one elasticity is posted on the downside of bottom panel
The first excellent closing rubber, the first base apertures are blocked by the first closing rubber.
Preferably, target lamella and sound window are in θ counterclockwise1It is flushed at the top of angle, target lamella upper end and right panel, the upper end
Right side is Nian Jie on the left of the pillow item of top, and Nian Jie with survey in right panel on the right side of the top pillow item, target lamella lower end is located at first
Between base apertures and the second base apertures.
Preferably, scattering target piece back veneer material is plastics, and left side is glued with scattering layer, 0.4 ㎜ of scattering layer thickness <,
One side is uniformly coated with particle diffusing scattering coating upwards for it.
Preferably, imitating organization material is aqueous high molecular gel based composites, and total depth is more than or equal to 100 ㎜, has
Parameters,acoustic identical with human body soft tissue.
Specifically, parameters,acoustic includes: acoustic velocity of material (1540 ± 10) m/s, acoustic attenuation coefficient slope (0.7 ± 0.05)
dB/(cm·MHz)；Parameters,acoustic is that temperature obtains to measure under conditions of [(23 ± 3) DEG C], and the imitative organization material can be used
Special-purpose aqueous Precerving liquid is maintained, and the Precerving liquid is injected via the first base apertures on bottom panel.
Preferably, device has at least one to fix device on bottom panel and pedestal, and fixed device includes: that bottom panel is solid
Determine hole, pedestal fixation hole, countersunk head screw and nut.
On the other hand, a kind of B ultrasound instrument pitching resolution measurement method, method include one of face target method and line target method
Or it is a variety of；Wherein,
Face target method is to carry out pitching resolving power by radiating plane of arrangement scattering target piece in ultrasonic sound field in B ultrasound instrument probe
Measurement；Applied to such as above-mentioned imitated NDVI, when target lamella and sound window are in θ counterclockwise1Angle uses B ultrasound Image-forming instrument
In face of target lamella imaging image bright band along depth direction size be d1, available first pitching resolving power s1=d1/
tanθ1；
Line target method should arrange that axial target line carries out pitching resolving power in ultrasonic sound field by radiating in B ultrasound instrument probe
Measurement；For such as above-mentioned imitated NDVI, ultrasonic probe is put according to position drawn by the online target method bearing mark line (8) of sound window
It sets, when line target method bearing mark line (8) and front panel angle clockwise are θ2, i.e. ultrasonic probe is with front panel angle clockwise
When θ2, it is d that target line, which sprawls width in the transverse direction of B ultrasound image,2, available second pitching resolving power s2=d2/tanθ2。
The present invention has the advantages that force value is differentiated in pitching may be used as determining the ginseng of B ultrasound Image-forming instrument gain for threshold value state
According to object, keeps pitching resolving power identical as Zhou Xiang, the measuring condition of lateral resolution, constitute complete data group；In addition pitching is differentiated
The overall picture of force value offer Ultrasonic-B probe pitch orientation acoustic beam section.It can easily learn acoustic beam within the scope of visible depth
3D shape, it is especially significant to B ultrasound Image-forming instrument research and development.
Detailed description of the invention
In order to become apparent from the technical solution for illustrating the embodiment of the present invention, embodiment will be described below in it is required use it is attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the imitated NDVI face target method instrumentation plan of the embodiment of the present invention；
Fig. 2 is the imitated NDVI face target method measuring principle front view of the embodiment of the present invention；
Fig. 3 is the imitated NDVI line target method instrumentation plan of the embodiment of the present invention；
Fig. 4 is the imitated NDVI line target method measuring principle top view of the embodiment of the present invention；
Fig. 5 is the imitated NDVI investigation depth instrumentation plan of the embodiment of the present invention；
Fig. 6 is a kind of imitated NDVI three-dimensional side view of measurement B ultrasound instrument pitching resolving power of the embodiment of the present invention；
Fig. 7 is a kind of imitated NDVI three-dimensional perspective of measurement B ultrasound instrument pitching resolving power of the embodiment of the present invention；
Fig. 8 is a kind of imitated NDVI front cross-sectional view of measurement B ultrasound instrument pitching resolving power of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It is a kind of measure B ultrasound instrument pitching resolving power measurement method, method include one of face target method and line target method or
It is a variety of；Wherein,
Face target method is to carry out pitching resolving power by radiating plane of arrangement scattering target piece in ultrasonic sound field in B ultrasound instrument probe
Measurement.
In first specific embodiment, as shown in Figure 1, imitated NDVI is horizontal positioned on the table, at the top of it
Inject appropriate amount of fluid couplant in sink frame 2, liquid coupling medium includes clear water and medical ultrasonic coupling agent, specifically, clearly
Water can be distilled water or deionized water；The radiating surface 30 of Ultrasonic-B probe 28 is coupled in sound window 1, the long side of Ultrasonic-B probe 28,
I.e. velocity of sound scanning direction is parallel with the short side of top sink frame 2, keeps its longitudinal axis vertical with 1 surface of sound window, Ultrasonic-B probe 28 passes through
Ultrasonic-B probe signal cable 29 connects the transmitting of B ultrasound host signal and receives signal and show image, by tested B ultrasound device power-up, in advance
After heat, it is set as two-dimentional gray scale imaging mode, single width B is shown；The related key button of tested equipment is adjusted, including using higher right
Than degree, medium overall gain, the suitably TGC (STC) that is distributed and higher brightness.
As shown in Fig. 2, Ultrasonic-B probe 28 gives off ultrasonic sound field by the radiating surface coupled with sound window 1, in imitative organization material
The ultrasonic acoustic beam section 32 of certain shapes is formed in 25, acoustic beam acoustic axis is 33, and ultrasonic acoustic beam is unrestrained due to the particle of scattering layer 27
It scatters coating and diffusing reflection occurs, therefore will form the bright band being made of scattering luminous point, the bright band in B ultrasound Image-forming instrument screen
Width in the depth direction be ultrasonic acoustic beam in the extension of 27 depth direction of scattering layer, i.e. B ultrasound image development depth d1, when
Target lamella, i.e., the first corresponding target piece bearing mark line 91 and sound window 1 are in θ counterclockwise1Angle, ultrasonic acoustic beam envelope is along horizontal
To extension, i.e. the first pitching resolving power s1, by the available s of trigonometric function relationship1=d1/tanθ1。
Line target method should arrange that axial target line carries out pitching resolving power in ultrasonic sound field by radiating in B ultrasound instrument probe
Measurement.
In second specific embodiment, as shown in figure 3, imitated NDVI is horizontal positioned on the table, by Ultrasonic-B probe
28 radiating surface 30 is coupled in the line target method bearing mark line 8 of sound window 1, the long side of Ultrasonic-B probe 28, i.e. velocity of sound scanning direction and line
Target method bearing mark line 8 is parallel, and Ultrasonic-B probe 28 connects the transmitting of B ultrasound host signal by Ultrasonic-B probe signal cable 29 and receives letter
Number and show image, after tested B ultrasound device power-up, preheating, be set as two-dimentional gray scale imaging mode, single width B is shown；Adjust quilt
The related key button for examining equipment, including using higher contrast, medium overall gain, the suitably TGC (STC) that is distributed and relatively highlighted
Degree can be obtained using imitative organization material backscattering as one group of target line image of background.
As shown in figure 4, axial target line-group 14 is perpendicular to front panel 3 and rear panel 4, the ultrasonic acoustic beam envelope of Ultrasonic-B probe 28
Projection 38 and overlapping part being projected on B ultrasound picture reproducer on energy converter scanning direction of axial target line-group 14 are presented one
B ultrasound image development bright band 41, bright band 41 are showed on B ultrasound image development on B ultrasound Image-forming instrument along 42 and B ultrasound image development
It is lower along 43, on along 42 and lower along the distance between 43, i.e., it is d that line target, which sprawls width in the transverse direction of B ultrasound image,2, ultrasonic acoustic beam packet
The thickness of network projection 38, i.e. the second pitching resolving power s2.When line target method bearing mark line 8 and front panel angle clockwise are θ2, i.e.,
θ when ultrasonic probe and the angle clockwise of front panel 3 are2, by the available s of trigonometric function relationship2=d2/tanθ2。
It is measured in third specific embodiment, while using face target method and line target method.
Line target method is used first, i.e. method in second specific embodiment is being obtained to imitate organization material backscattering
For background one group of target line image when, every target line image varying length in one group of target line image, have one to two most
Short person indicates acoustic lens focus near the depth；By tested instrument regulation to gain for threshold value state, concrete operations are as follows: reduce
Gain is adjusted TGC (STC), suitably reduction brightness, the backscattering luminous point of the imitative organization material of disappearance, only remaining clear on screen
Visible target line image；B/B double width will be switched to by test examination instrument setting to show, the full line target line image taken is placed in left width
In；Display is then switched into right width, at this time left width natural freezing.
At this point, Ultrasonic-B probe is moved at the smallest 1 surface of sound window of face target depth, i.e. the another side of top sink frame 2 carries out
The measurement of face target method, the long side of Ultrasonic-B probe 28, i.e. velocity of sound scanning direction are parallel with top 2 short sides of sink frame, keep its longitudinal axis and sound
1 surface of window is vertical, can see that the bright band being made of scattering luminous point, translation probe make bright band in tested instrument screen
The image of a certain target line, by freeze frame, measures bright band with electronic cursor to putting down along the middle line and left width image of depth direction
Along the size d of depth direction3.Then third pitching resolving power is are as follows: s3=d3/ tan 70=d3/2.747。
In the 4th specific embodiment, it can replace and carry out the survey of line target method diverter surface target method in third specific embodiment
When amount, Ultrasonic-B probe 28 removes in third specific embodiment along the distance of 1 surface translation of sound window and shows and measure and left width figure
As in outside the corresponding bright band size of all visible target lines.Only it can also show and detect and be located at investigation depth 1/3,1/2 and 2/3
The corresponding bright band size of target line.
In the 5th specific embodiment, as shown in figure 5, the measurement of investigation depth is carried out using axial target line-group 14, by B
Super probe 28 is placed along the direction for perpendicular to axial target line-group 14 being 3 first axis target line aperture group 61 of front panel, is imaged in B ultrasound
The image of one group of target line point along depth direction arrangement can be presented on instrument.It can be surveyed using the electronic cursor of B ultrasound Image-forming instrument
Target line point is along the spacing of depth direction and the max survey depth of the B ultrasound instrument out.
Imitated NDVI based on the above method is as shown in fig. 6-7, comprising: body mould shell, axial target line-group 14, target lamella
With imitative organization material 25；Wherein,
Body mould shell include: sound window 1, top sink frame 2, front panel 3, rear panel 4, Left-Hand Panel 10, right panel 5,
Bottom panel 15 and pedestal 7；Wherein, front panel 3 and rear panel 4 are in mirror symmetry, and 3 left side of front panel is provided with first axle along longitudinal direction
To target line aperture group 61, first axis target line aperture group 61 includes at least two aperture, rear panel 4 and 3 symmetric position edge of front panel
Longitudinal direction is provided with the second axial target line aperture group 62, and the second axial target line aperture group 62 includes at least two aperture；Bottom panel 15 wraps
At least two aperture is included, the first base apertures 17 and the second base apertures 16 are from left to right followed successively by；
Axial target line-group 14 includes at least 2 target lines, and one end of every target line passes through first axis target line aperture group 61 admittedly
1 hole fix, the other end is fixed by the hole of the horizontal symmetrical of the second axial target line aperture group 62, and each hole only fixes one
One end of bar target line；
Target lamella includes scattering target piece backboard 13 and scattering layer 27.
Each opening diameter in first axis target line aperture group 61 and the second axial target line aperture group 62 is more than or equal to 0.1
㎜, the centre distance between two holes are 10 ㎜；Every target linear diameter in axial target line-group 14 is less than or equal to 0.3 ㎜, and material is
Nylon wire, every target line pass through each aperture in first axis target line aperture group 61 and the second axial target line aperture group 62 respectively
Through imitated NDVI, target line both ends are separately fixed at the outside side of front panel 3 and rear panel 4, and every target line has identical
Pulling force so that nylon target line-group is uniformly tightened.
At least provided with a non-slip groove 11 inside 3 inside of front panel and/or 4 inside of rear panel and/or Left-Hand Panel 10；
Non-slip groove 11 prevents its sliding for fixed imitative organization material 25；Corresponding with target slice position first is decorated on the outside of front panel 3
Target piece bearing mark line 91 is decorated with the second target piece bearing mark line 92 corresponding with target slice position on the outside of rear panel 4.
Specifically, as shown in fig. 7, being equipped with a non-slip groove 11 inside rear panel 4, set that there are two anti-inside Left-Hand Panel 10
Sliding slot 11.
Top sink frame 2 is bonded by organic glass item, or by acrylonitrile-butadiene-styrene (ABS) ABS plastic integrated injection
It moulds, for holding liquid coupling medium.
Sound window 1 is the polyester film that thickness is less than or equal to 100 μm, and line target method bearing mark line 8, line target method are decorated in left side
Bearing mark line 8 and the angle clockwise of front panel 3 are θ2, preferably 70 °.
Filling channel of first base apertures 17 as imitative organization material 25；At least one elasticity is posted on the downside of bottom panel 15
The first excellent closing rubber 19, the first base apertures 17 are blocked by the first closing rubber 19.
Target lamella and sound window 1 are in θ counterclockwise1It is flushed at the top of angle, preferably 70 °, target lamella upper end and right panel 5,
Be bonded on the left of the pillow item 21 of top on the right side of the upper end, Nian Jie with survey in right panel 5 on the right side of item 21, target lamella lower end position is rested the head at top
Between the first base apertures 17 and the second base apertures 16.
13 material of scattering target piece backboard is ABS plastic, and left side is glued with scattering layer 27,27 thickness < 0.4 of scattering layer
㎜, one side is uniformly coated with particle diffusing scattering coating upwards.
Imitative organization material 25 is aqueous high molecular gel based composites, and total depth is more than or equal to 100 ㎜, is had and human body
The identical parameters,acoustic of soft tissue；Specifically, parameters,acoustic includes: acoustic velocity of material (1540 ± 10) m/s, acoustic attenuation coefficient slope
(0.7±0.05)dB/(cm·MHz)；Parameters,acoustic is that temperature obtains to measure under conditions of [(23 ± 3) DEG C].
Imitative organization material 25 can be used special-purpose aqueous Precerving liquid and be maintained, and the Precerving liquid is via on bottom panel 15
The injection of first base apertures 17.
Device has at least one to fix device 22 on bottom panel 15 and pedestal 7, and fixed device 22 includes: that bottom panel is solid
Determine hole, pedestal fixation hole, countersunk head screw and nut.
Specifically, as shown in fig. 7, bottom panel 15 is set, there are three fixed devices 22, as shown in figure 8, bottom panel 15 is set
There is a fixed device 22.
The present invention provides a kind of imitated NDVIs and its method for measuring B ultrasound instrument pitching resolving power, by body mould
The pitching resolving power that face target method measures ultrasonic acoustic beam can be used, by using one in the face target target lamella of middle setting certain angle
Serial axial direction nylon target line-group can measure the investigation depth of ultrasonic probe, and line target method can be used and carry out the survey of pitching resolving power
Amount, the pitching obtained with face target method measurement are differentiated force value and are checked.
Force value is differentiated in pitching may be used as determining the object of reference of B ultrasound Image-forming instrument gain for threshold value state, make pitching resolving power
It is identical as axial direction, the measuring condition of lateral resolution, constitute complete data group；In addition pitching differentiates force value offer Ultrasonic-B probe and bows
Face upward the overall picture of direction acoustic beam section.B ultrasound is imaged in the 3D shape that can easily learn acoustic beam within the scope of visible depth
Instrument research and development is especially significant.
Target method in face proposed by the present invention is adhered to scatterer on one hard substrate, a part of the plate as shell
It is diagonally-installed in entire framework, standard compliant imitative organization material filling is in the sky surrounded by organic glass and reflective face target
Between in, so that the imagination in IEC standard file be made to have obtained satisfactory realization.However, being only equipped with face target method detection B ultrasound when utilizing
When the pitching resolving power of instrument, the case where a certain depth can only be seen on screen, and do not know it is which kind of depth.In the present invention
The line target method of proposition, then the case where capable of seeing a variety of depths simultaneously, to obtain the packet of the acoustic beam shape of pitch orientation
Network, and its depth has clear numerical value.When being used together with face target method, sounding mark is also acted as.
Above specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Illustrate, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (10)
1. a kind of imitated NDVI for measuring B ultrasound instrument pitching resolving power characterized by comprising body mould shell, axial target line
Group (14), target lamella and imitative organization material (25)；Wherein,
The body mould shell includes sound window (1), top sink frame (2), front panel (3), rear panel (4), Left-Hand Panel (10), the right side
Side panel (5), bottom panel (15) and pedestal (7)；Wherein, the front panel (3) and rear panel (4) are in mirror symmetry, described
It is provided with first axis target line aperture group (61) along longitudinal direction on the left of front panel (3), the first axis target line aperture group (61) includes
At least two aperture, the rear panel (4) and the front panel (3) symmetric position are provided with the second axial target line aperture group along longitudinal direction
(62), the described second axial target line aperture group (62) includes at least two aperture；The bottom panel (15) includes that at least two is opened
Hole is from left to right followed successively by the first base apertures (17) and the second base apertures (16)；
The axial direction target line-group (14) includes at least 2 target lines, and one end of the every target line passes through first axis target line admittedly and opens
1 hole of Kong Qun (61) is fixed, and the other end is fixed by the hole of the horizontal symmetrical of the second axial target line aperture group (62), and each
One end of a target line is only fixed in hole；
The target lamella includes scattering target piece backboard (13) and scattering layer (27).
2. imitated NDVI according to claim 1, which is characterized in that the first axis target line aperture group (61) and
The centre distance between two holes in two axial target line aperture groups (62) is 10 ㎜；Every target in the axial direction target line-group (14)
Linear diameter is less than or equal to 0.3 ㎜, and material is nylon wire, and every target line passes through first axis target line aperture group (61) and the respectively
Each aperture in two axial target line aperture groups (62) runs through imitated NDVI, target line both ends be separately fixed at front panel (3) and
The outside side of rear panel (4), every target line pulling force having the same is so that nylon target line-group is uniformly tightened.
3. imitated NDVI according to claim 1, which is characterized in that behind the front panel (3) is internal and/or described
Plate (4) is internal and/or Left-Hand Panel (10) is internal at least provided with a non-slip groove (11)；The non-slip groove (11) is for fixing
Imitative organization material (25), prevent its sliding；The first target piece corresponding with target slice position direction is decorated on the outside of the front panel (3)
The second target piece bearing mark line (92) corresponding with target slice position is decorated in mark line (91), rear panel (4) outside.
4. imitated NDVI according to claim 1, which is characterized in that the top sink frame (2) is by organic glass item
It is bonded, or is an integrally-molded by acrylonitrile-butadiene-styrene (ABS) ABS plastic, for holding liquid coupling medium.
5. imitated NDVI according to claim 1, which is characterized in that the sound window (1) is that thickness is less than or equal to 100 μm
Polyester film, left side is decorated with line target method bearing mark line (8), the line target method bearing mark line (8) and the front panel
(3) angle is θ clockwise2。
6. imitated NDVI according to claim 1, which is characterized in that first base apertures (17) are used as described imitative group
Knit the filling channel of material (25)；The first closing rubber of at least one excellent spring is posted on the downside of the bottom panel (15)
(19), first base apertures (17) are blocked by the first closing rubber (19).
7. imitated NDVI according to claim 1, which is characterized in that the target lamella and sound window (1) are in θ counterclockwise1Folder
It is flushed at the top of angle, target lamella upper end and right panel (5), it is Nian Jie on the left of top pillow item (21) on the right side of the upper end, it is described
Top rest the head on it is Nian Jie with the interior survey of right panel (5) on the right side of item (21), target lamella lower end be located at first base apertures (17) and
Between second base apertures (16)；
Scattering target piece backboard (13) material is plastics, and left side is glued with the scattering layer (27), the scattering layer
(27) 0.4 ㎜ of thickness <, one side is uniformly coated with particle diffusing scattering coating upwards.
8. imitated NDVI according to claim 1, which is characterized in that the imitative organization material (25) is aqueous high molecular
Gel based composites have parameters,acoustic identical with human body soft tissue；Specifically, the parameters,acoustic includes: material
The velocity of sound (1540 ± 10) m/s, acoustic attenuation coefficient slope (0.7 ± 0.05) dB/ (cmMHz)；The parameters,acoustic is that temperature is
It measures and obtains under conditions of [(23 ± 3) DEG C], the imitative organization material (25) can be used special-purpose aqueous Precerving liquid and be maintained, institute
Precerving liquid is stated to inject via the first base apertures (17) on bottom panel (15).
9. imitated NDVI according to claim 1, which is characterized in that filled on the bottom panel (15) and pedestal (7)
It is equipped at least one and fixes device (22), the fixed device (22) includes: bottom panel fixation hole, pedestal fixation hole, countersunk head
Screw and nut.
10. a kind of method for measuring B ultrasound instrument pitching resolving power, which is characterized in that the method includes face target methods and line target method
One of or it is a variety of；Wherein,
The face target method is to carry out pitching resolving power by radiating plane of arrangement scattering target piece in ultrasonic sound field in B ultrasound instrument probe
Measurement；Applied to imitated NDVI as described in claim 1, when target lamella and sound window (1) are in θ counterclockwise1Angle uses
B ultrasound Image-forming instrument in face of target lamella imaging image bright band along depth direction size be d1, available first pitching point
Distinguish power s1=d1/tanθ1；
The line target method should arrange that axial target line carries out pitching resolving power in ultrasonic sound field by radiating in B ultrasound instrument probe
Measurement；For imitated NDVI as described in claim 1, by ultrasonic probe according to the online target method bearing mark line of sound window (1)
(8) position drawn by is placed, when line target method bearing mark line (8) and the front panel (3) angle clockwise are θ2, i.e. ultrasonic probe
θ when angle is clockwise with the front panel (3)2, it is d that target line, which sprawls width in the transverse direction of B ultrasound image,2, available second bows
Face upward resolving power s2=d2/tanθ2。
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