CN102058417A - Linear density control method in ultrasonic image - Google Patents
Linear density control method in ultrasonic image Download PDFInfo
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- CN102058417A CN102058417A CN2010106167861A CN201010616786A CN102058417A CN 102058417 A CN102058417 A CN 102058417A CN 2010106167861 A CN2010106167861 A CN 2010106167861A CN 201010616786 A CN201010616786 A CN 201010616786A CN 102058417 A CN102058417 A CN 102058417A
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- line density
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- linear density
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Abstract
The invention discloses a linear density control method in an ultrasonic image, realizing self-adaptive linear density control in different focus positions through the constant linear density in unit arc length or the beam widths of the focus positions after focusing so as to not only avoid signal redundancy and improve image frame frequency when a focus position is in a near field area of an image, but also enhance a far field signal and improve the far field transversal resolution of the image when the focus position is in a far field area of the image. In the case of three or more focuses, a beam is favorably focused in each focus area so that the whole resolution and the coherence of the image are better, and thus, the linear density control method is easy for the increase of the linear density so that the frame frequency is decreased; in that case, the image frame frequency in a set range in the ultrasonic image can be utilized for limiting the linear density of each focus to be within the maximum linear density permitted by the image frame frequency; and a maximum linear density value is adopted when the linear density of a focus exceeds the maximum linear density. When the self-adaptive control of the linear density is carried out based on different focus positions, the self-adaptive adjustment of the linear density can be further carried out according to the focus number to ensure the frame frequency and the transversal resolution of the whole image and the constancy of the far field and the near field.
Description
Technical field
The present invention relates to ultrasonoscopy center line density control method.
Background technology
In existing diasonograph, each frame ultrasonoscopy all is made up of the scanning line of some, and wherein the quantity of scanning line is referred to as line density.Line density generally is divided into several different class, and the user can select by operation interface.After the user has selected a kind of line density and has been provided with, line density is along with the position and the number of focus change, for arc battle array probe and phased array probe imaging, and the virtual arc battle array imaging of linear array probe, line density is fixed, promptly the quantity of the scanning line in the unit angle is certain, as shown in Figure 1, such major defect is: if line density is too high, will cause the near-field signals redundancy, and reduce frame frequency; If line density is low excessively, will causes the far-field signal deficiency, and lose the lateral resolution in far field.
Summary of the invention
The purpose of this invention is to provide the adaptive line density control method of focus in the ultrasonoscopy.
For achieving the above object, the technical solution used in the present invention is:
A kind of ultrasonoscopy center line density control method,
Have N focus in the described ultrasonoscopy, N＞=2 are set at datum line density S with the line density of one of them focal point F, and are constant based on the line density in the unit arc length, then all the other focal point F
iLine density S
iObtain by described datum line density S, 1=＜i＜=N-1,
Setting described focal point F apart from the degree of depth of obtaining the detecting head surface of described ultrasonoscopy is d, described focal point F
iThe degree of depth of the described detecting head surface of distance is d
i, the subtended angle of described ultrasonoscopy is θ,
When described probe is phased array probe, the arc length L=2*d* θ of described focal point F position, described focal point F
iThe arc length L of position
i=2*d
i* θ, then S
i=S/L*L
i
When described probe is arc battle array probe, or linear array probe and this linear array probe be when adopting virtual arc battle array to obtain described ultrasonoscopy, and the radius of described arc battle array is R, arc length L=2* (d+R) the * θ of described focal point F position, described focal point F
iThe arc length L of position
i=2* (d
i+ R) * θ, then S
i=S/L*L
i
Preferably, described datum line density S=L/W*K, W are the beam angle that focuses in described focal point F, the wave beam eclipsed parameter of K for setting.
A kind of ultrasonoscopy center line density control method,
Have M focus in the described ultrasonoscopy, M＞=1, focal point F
jThe degree of depth that distance is obtained the detecting head surface of described ultrasonoscopy is d
j, 1=＜j＜=M is in this focal point F
jThe beam angle that focuses on is W
j, the subtended angle of described ultrasonoscopy is θ,
When described probe is phased array probe, described focal point F
jThe arc length L of position
j=2*d
j* θ, then this focal point F
jLine density S
j=L
j/ W
j* K
j, this K
jBe the eclipsed parameter of setting of wave beam;
When described probe is arc battle array probe, or linear array probe and this linear array probe be when adopting virtual arc battle array to obtain described ultrasonoscopy, and the radius of described arc battle array is R, described focal point F
jThe arc length L of position
j=2* (d
j+ R) * θ, then this focal point F
jLine density S
j=L
j/ W
j* K
j, this K
jBe the eclipsed parameter of setting of wave beam.
Preferably, described ultrasonoscopy has the picture frame frequency of set point, and in described N or M＞=3 o'clock, the line density of each focus is no more than the max line density that described picture frame frequency allows, when focal line density surpasses described max line density, adopt this max line density value.
Because the utilization of technique scheme, the present invention compared with prior art has following advantage: constant by the line density in the unit arc length, perhaps by the beam angle after the focusing of focus position, realized the adaptive line density control in different focal positions, the focal position is when the image near-field region like this, avoid signal redundancy, improve picture frame frequency; And the focal position strengthens far-field signal when the image far-field region, improve the lateral resolution in the far field of image.In the focus number is 3 or when surpassing 3, because wave beam is all better in the focusing of each focus area, make that the whole resolution and the concordance of image are better, make easily that by aforesaid line density control method line density is excessive like this, then can reduce frame frequency, this moment can be according to the picture frame frequency of set point in the ultrasonoscopy, make the line density of each focus be no more than the max line density that picture frame frequency allows, when focal line density surpasses max line density, adopt this max line density value.When coming self adaptation control line density, also can adjust line density, guarantee the frame frequency of general image and the concordance in lateral resolution and nearly far field according to the further self adaptation of the number of focus based on different focal positions.
Description of drawings
Accompanying drawing 1 is the sketch map that adopts static line density in the existing ultrasonoscopy;
Accompanying drawing 2 is the sketch map of the different line density of focal point control different among the present invention.
The specific embodiment
Further set forth structure of the present invention below in conjunction with accompanying drawing.
In Fig. 2, for different focuses, adopt different line densities to carry out ultra sonic imaging, the adaptive line density algorithm of its focus is as described below:
The specific embodiment one:
The core of line density control method is: for different focal positions, keep the line density in the unit arc length constant, come to control adaptively the line density of each focal position thus.In Fig. 2, the line density of focal point F ocus1 is set at datum line density S, then can draw the line density S of focal point F ocus2 by the datum line density S of focal point F ocus1
2, specifically, the degree of depth of focal point F ocus1 is d, the degree of depth of focal point F ocus2 is d
2, the subtended angle of ultrasonoscopy is θ, the degree of depth of focus is defined as the distance of focus to the detecting head surface that obtains ultrasonoscopy,
When probe adopts phased array probe; shown in the top piece image of Fig. 2; the arc length of focal point F ocus1 position is that (arc length is defined as angle and multiply by radius L=2*d* θ usually; here also multiply by again 2 consider transmit and receive two paths), the arc length of focal point F ocus2 position is L
2=2*d
2* θ, based on the constant prerequisite of the line density in the unit arc length, the line density of focal point F ocus2 is S so
2=S/L*L
2
Adopt arc battle array probe at probe, or linear array probe and this linear array probe be when adopting virtual arc battle array imaging, and shown in the following piece image of Fig. 2, arc battle array radius is R, the arc length of focal point F ocus1 position is L=2* (d+R) * θ, and the arc length of focal point F ocus2 position is L
2=2* (d
2+ R) * θ, based on the constant prerequisite of the line density in the unit arc length, the line density of focal point F ocus2 is S so
2=S/L*L
2
If also have other focuses, then can obtain the line density of other focal positions by this kind algorithm.In other embodiment, we also can be with the line density of focal point F ocus2 as datum line density, thereby derive the line density of other focuses.
The specific embodiment two:
The core of line density control method is: carry out the line density control of each focus adaptively according to the beam angle after the focusing of focus position.Same is that example illustrates with focal point F ocus1 among Fig. 2 and focal point F ocus2, and the degree of depth of focal point F ocus1 is d
1, the beam angle after focal point F ocus1 focuses on is W
1, the degree of depth of focal point F ocus2 is d
2, the beam angle after focal point F ocus2 focuses on is W
2, the subtended angle of ultrasonoscopy is θ, the degree of depth of focus is defined as the distance of focus to the detecting head surface that obtains ultrasonoscopy equally,
When probe adopted phased array probe, shown in the top piece image of Fig. 2, the arc length of focal point F ocus1 position was L
1=2*d
1* θ, its corresponding line density is S so
1=L
1/ W
1* K
1, K wherein
1Be the eclipsed parameter of wave beam, the arc length of focal point F ocus2 position is L
2=2*d
2* θ, its corresponding line density is S so
2=L
2/ W
2* K
2, K wherein
2Be the eclipsed parameter of wave beam.
Adopt arc battle array probe at probe, or linear array probe and this linear array probe be when adopting virtual arc battle array imaging, shown in the following piece image of Fig. 2, arc battle array radius is R, and the arc length of focal point F ocus1 position is L
1=2* (d
1+ R) * θ, its corresponding line density is S so
1=L
1/ W
1* K
1, K wherein
1Be the eclipsed parameter of wave beam, the arc length of focal point F ocus2 position is L
2=2* (d
2+ R) * θ, its corresponding line density is S so
2=L
2/ W
2* K
2, K wherein
2Be the eclipsed parameter of wave beam.
If also have other focuses, can the rest may be inferred, obtain the line density of other focal positions.
In practice, the specific embodiment one and two can be combined, promptly the datum line density S of focal point F ocus1 can be calculated by the method in the specific embodiment two in the specific embodiment one, and datum line density S is the S in the specific embodiment two
1=L
1/ W
1* K
1
What embodied in the specific embodiment one and two is to calculate different line densities by not confocal position, makes the focal position when the image near-field region, control line density adaptively, thus avoid signal redundancy, improve picture frame frequency; And the focal position is when the image far-field region, also control line density adaptively, thus strengthen far-field signal, improve the lateral resolution in the far field of image.
In the ultrasonoscopy, when the focus number is fewer, for example, when the focus number is 1 or 2, because wave beam only focuses on better at focus area, so whole resolution and the concordance of image from the near field to the far field is relatively poor, then can increase line density by the line density control method among the specific embodiment one and two, can improve the resolution of general image like this.In the focus number more for a long time, for example, the focus number is 3 or when surpassing 3, because wave beam is all better in the focusing of each focus area, make that the whole resolution and the concordance of image are better, make easily that by the line density control method among the specific embodiment one and two line density is excessive like this, then can reduce frame frequency, this moment can be according to the picture frame frequency of set point in the ultrasonoscopy, make the line density of each focus be no more than the max line density that picture frame frequency allows, when focal line density surpasses max line density, adopt this max line density value.
Come the method for self adaptation control line density based on the different focal positions in the specific embodiment one and two, also can adjust line density, guarantee the frame frequency of general image and the concordance in lateral resolution and nearly far field according to the further self adaptation of the number of focus.
Claims (4)
1. ultrasonoscopy center line density control method is characterized in that:
Have N focus in the described ultrasonoscopy, N＞=2 are set at datum line density S with the line density of one of them focal point F, and are constant based on the line density in the unit arc length, then all the other focal point F
iLine density S
iObtain by described datum line density S, 1=＜i＜=N-1,
Setting described focal point F apart from the degree of depth of obtaining the detecting head surface of described ultrasonoscopy is d, described focal point F
iThe degree of depth of the described detecting head surface of distance is d
i, the subtended angle of described ultrasonoscopy is θ,
When described probe is phased array probe, the arc length L=2*d* θ of described focal point F position, described focal point F
iThe arc length L of position
i=2*d
i* θ, then S
i=S/L*L
i
When described probe is arc battle array probe, or linear array probe and this linear array probe be when adopting virtual arc battle array to obtain described ultrasonoscopy, and the radius of described arc battle array is R, arc length L=2* (d+R) the * θ of described focal point F position, described focal point F
iThe arc length L of position
i=2* (d
i+ R) * θ, then S
i=S/L*L
i
2. line density control method according to claim 1 is characterized in that: described datum line density S=L/W*K, W are the beam angle that focuses in described focal point F, the wave beam eclipsed parameter of K for setting.
3. ultrasonoscopy center line density control method is characterized in that:
Have M focus in the described ultrasonoscopy, M＞=1, focal point F
jThe degree of depth that distance is obtained the detecting head surface of described ultrasonoscopy is d
j, 1=＜j＜=M is in this focal point F
jThe beam angle that focuses on is W
j, the subtended angle of described ultrasonoscopy is θ,
When described probe is phased array probe, described focal point F
jThe arc length L of position
j=2*d
j* θ, then this focal point F
jLine density S
j=L
j/ W
j* K
j, this K
jBe the eclipsed parameter of setting of wave beam;
When described probe is arc battle array probe, or linear array probe and this linear array probe be when adopting virtual arc battle array to obtain described ultrasonoscopy, and the radius of described arc battle array is R, described focal point F
jThe arc length L of position
j=2* (d
j+ R) * θ, then this focal point F
jLine density S
j=L
j/ W
j* K
j, this K
jBe the eclipsed parameter of setting of wave beam.
4. according to claim 1 or 3 described line density control methods, it is characterized in that: described ultrasonoscopy has the picture frame frequency of set point, in described N or M＞=3 o'clock, the line density of each focus is no more than the max line density that described picture frame frequency allows, when focal line density surpasses described max line density, adopt this max line density value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010616786 CN102058417B (en) | 2010-12-31 | 2010-12-31 | Linear density control method in ultrasonic image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010616786 CN102058417B (en) | 2010-12-31 | 2010-12-31 | Linear density control method in ultrasonic image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102058417A true CN102058417A (en) | 2011-05-18 |
| CN102058417B CN102058417B (en) | 2013-03-06 |
Family
ID=43994061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010616786 Expired - Fee Related CN102058417B (en) | 2010-12-31 | 2010-12-31 | Linear density control method in ultrasonic image |
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| Country | Link |
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| CN (1) | CN102058417B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232084A (en) * | 2015-10-28 | 2016-01-13 | 深圳开立生物医疗科技股份有限公司 | Ultrasonic three-dimensional imaging control method, ultrasonic three-dimensional imaging method and system |
| CN110327077A (en) * | 2019-07-09 | 2019-10-15 | 深圳开立生物医疗科技股份有限公司 | A kind of blood flow display methods, device and ultrasonic device and storage medium |
| WO2021129746A1 (en) * | 2019-12-24 | 2021-07-01 | 深圳迈瑞生物医疗电子股份有限公司 | Ultrasonic imaging method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02246944A (en) * | 1989-03-20 | 1990-10-02 | Fuji Electric Co Ltd | Ultrasonic diagnostic device |
| JPH04152939A (en) * | 1990-10-17 | 1992-05-26 | Hitachi Medical Corp | Ultrasonic diagnostic device |
| US20030236461A1 (en) * | 2002-06-25 | 2003-12-25 | Koninklinke Philips Electronics, N.V. | System and method for electronically altering ultrasound scan line origin for a three-dimensional ultrasound system |
-
2010
- 2010-12-31 CN CN 201010616786 patent/CN102058417B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02246944A (en) * | 1989-03-20 | 1990-10-02 | Fuji Electric Co Ltd | Ultrasonic diagnostic device |
| JPH04152939A (en) * | 1990-10-17 | 1992-05-26 | Hitachi Medical Corp | Ultrasonic diagnostic device |
| US20030236461A1 (en) * | 2002-06-25 | 2003-12-25 | Koninklinke Philips Electronics, N.V. | System and method for electronically altering ultrasound scan line origin for a three-dimensional ultrasound system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105232084A (en) * | 2015-10-28 | 2016-01-13 | 深圳开立生物医疗科技股份有限公司 | Ultrasonic three-dimensional imaging control method, ultrasonic three-dimensional imaging method and system |
| CN105232084B (en) * | 2015-10-28 | 2017-12-12 | 深圳开立生物医疗科技股份有限公司 | A kind of ultrasonic three-dimensional imaging control method, imaging method and system |
| CN110327077A (en) * | 2019-07-09 | 2019-10-15 | 深圳开立生物医疗科技股份有限公司 | A kind of blood flow display methods, device and ultrasonic device and storage medium |
| WO2021129746A1 (en) * | 2019-12-24 | 2021-07-01 | 深圳迈瑞生物医疗电子股份有限公司 | Ultrasonic imaging method and system |
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|---|---|
| CN102058417B (en) | 2013-03-06 |
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