CN113509207A - Method for adjusting volume ratio based on ultrasonic hardware - Google Patents
Method for adjusting volume ratio based on ultrasonic hardware Download PDFInfo
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- CN113509207A CN113509207A CN202111065787.6A CN202111065787A CN113509207A CN 113509207 A CN113509207 A CN 113509207A CN 202111065787 A CN202111065787 A CN 202111065787A CN 113509207 A CN113509207 A CN 113509207A
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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
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
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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
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/466—Displaying means of special interest adapted to display 3D data
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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
- A61B8/48—Diagnostic techniques
- A61B8/483—Diagnostic techniques involving the acquisition of a 3D volume of data
Abstract
The invention provides a method for adjusting volume ratio based on ultrasonic hardware, which comprises the following steps: step S01: when the software issues the target volume rate to the main control chip, the main control chip can calculate the extreme point and the upper and lower limit ranges of the volume rate under the change of a plurality of hardware parameters according to a formula and a default initial value; step S02: arranging the volume rate results obtained in the step S01 according to the sequence of the volume rates from small to large, recording the volume rate results and the hardware parameters corresponding to each volume rate and storing the volume rate results and the hardware parameters in a hardware cache chip; step S03: the required volume rate is realized by adjusting hardware parameters, and the intelligent method for realizing the multi-volume rate of the 3D image is realized by automatically adjusting the image data volume and the time consumption through hardware. Hardware processing time is shortened, so that intelligent variable volume rate is realized, an external scanning device is not changed, the positioning precision of the ablation catheter can be maintained, and the display refresh rate of the 3D image can be improved.
Description
Technical Field
The invention belongs to the technical field of miniature ultrasonic detection, and relates to an intelligent ultrasonic hardware system with multiple volume ratios.
Background
The ultrasonic host acquires the ICE probe data and converts the ICE probe data into a 2-dimensional section image of human tissues; the host computer generates a 2D sectional view every time the ICE catheter rotates for one angle; and the 3D reconstruction module restores and reconstructs all the 2D sectional images into 3D volume imaging of human tissues.
In the ablation operation, the 3D module is responsible for the reconstruction of the three-dimensional structure of the internal body tissues (heart and blood vessel), and the position tracking and display of the ablation catheter in the 3D body structure; the refresh rate of the tissue volume displayed on the image interface is called the volume rate. The higher the refresh rate, the more accurate the position tracking of the ablation catheter, the more continuous the motion trajectory display, and the more convenient the physician's operation.
And the volume rate depends on the data volume and the corresponding time of the 2D sectional graph processed by the 3D module, and the larger the data volume is, the slower the processing time is, and the lower the volume rate is. The amount and time depend on the angular scanning speed of the 2D section, the number of physical scanning lines on each section and the data transmission rate of hardware.
Problems with the two methods described above: the angle scanning speed is increased, the angle stepping is smaller, the positioning is more accurate, but the number of the increased 2D sections enables the display to be refreshed more slowly; reducing the angular scan speed, while the reduced number of 2D slices allows faster display refresh, the positioning is not accurate enough.
Therefore, a method is urgently needed, and under the application scene, the positioning precision can be maintained, and the display refresh rate can be improved.
Disclosure of Invention
1. The technical problem to be solved is as follows:
the prior art has high positioning precision, slow refreshing, fast refreshing and inaccurate positioning.
2. The technical scheme is as follows:
in order to solve the above problems, the present invention provides a method for adjusting a volume ratio based on ultrasonic hardware, comprising the steps of: step S01: when the software issues the target volume rate to the main control chip, the main control chip can calculate the extreme point and the upper and lower limit ranges of the volume rate under the change of hardware parameters according to a formula and a default initial value; the hardware parameters include SLN Phy, Fs, N, and DataRate, step S03: arranging the volume rate results obtained in the step S01 according to the sequence of the volume rates from small to large, recording the volume rate results and the hardware parameters corresponding to each volume rate and storing the volume rate results and the hardware parameters in a hardware cache chip; step S03: the required volume ratio is realized by adjusting hardware parameters, and the formula is as follows: vol _ Rate =1/(Thard + Tsoft), where Vol _ Rate refers to the display refresh Rate of the 3D image on the screen, Thard is the elapsed time on the hardware level, Tsoft is the elapsed time on the software level, Thard =2 Depth/V SLN _ Phy (1+ Fs N/DataRate), Depth is set by the operator, V is the acoustic physical quantity, and Tsoft is assumed to be constant.
In step S01, the method for calculating the extremum point of the volume fraction under the variation of the hardware parameter and the upper and lower limit ranges includes: the first step is as follows: calculating the extreme point and boundary value range of the volume ratio under the change of a single parameter; the second step is that: the extremum points and boundary value ranges of the volume ratios under all parameter variations are calculated.
Tsoft includes scan line gain processing, 3D reconstruction, display refresh time.
In the first step, one of the parameters is changed, the other three parameters are fixed, a main control chip is used for solving an extreme point according to a unitary function, and the volume ratios corresponding to the upper boundary and the lower boundary in the change range are calculated; then changing a variable parameter, and sequentially calculating the volume ratio corresponding to the upper boundary and the lower boundary in the variable range of each parameter.
In the second step, the calculation circuit of the single parameter is made into a functional module, each parameter uses a module, a plurality of parallel modules are used for calculating together, the extreme points and the boundary ranges obtained by a plurality of parameters are combined into an extreme value range interval and a boundary interval, the whole extreme value range interval and the whole boundary interval are changed into grids according to the stepping of the clock period, hardware calculation is carried out on each grid point, and the volume ratio result under the corresponding parameter is output.
In step S03, for any input set of determined parameters, the main control chip finds the corresponding volume rate in the buffer. If the volume rate meets the requirement, the main control chip changes the parameters into control instructions and register values for other chips, and the hardware system is operated according to the corresponding volume rate.
In step S03, for any volume ratio to be realized, the main control chip finds out an exact value corresponding to the parameter in the cache.
3. Has the advantages that:
the invention realizes the intelligent method of 3D image multi-volume rate by automatically adjusting the image data volume and the time consumption through hardware. Effective data volume is compressed by automatically adjusting a plurality of hardware parameters according to the target volume rate, and hardware processing time is shortened, so that the volume rate is intelligently variable, an external scanning device is not changed, the positioning precision of the ablation catheter can be maintained, and the display refresh rate of the 3D image can be improved.
Detailed Description
The present invention will be described in detail with reference to examples.
SLN _ Phy (number of physical scan lines), Fs (sampling clock), N (sampling resolution), DataRate (data transfer Rate), Thard (consumption time in hardware level), Tsoft (consumption time in software level), Vol _ Rate (display refresh Rate of 3D image on screen), Depth (distance), V (acoustic physical quantity).
The 2D section data displayed on the screen is formed by splicing one scanning line, and the more the number of the displayed scanning lines is, the more exquisite the 2D image is.
The display scan lines are processed by the physical scan lines through software algorithms. Defining the number of display scanning lines as SLN _ Dis, the number of physical scanning lines as SLN _ Phy and the scanning line Gain as SLN _ Gain, then:
SLN_Dis = SLN_Phy * SLN_Gain
the physical scanning line of the ultrasonic equipment is generated by sampling Data driven by a clock, if the sampling resolution is N (bit), the sampling clock is Fs (Hz), the image depth is Depth (m), the sound velocity is V (m/s), and the Data quantity on a single physical scanning line is Data _ Phy (bit), then:
Data_Phy = 2*Depth/V*Fs*N
the total amount of Data on all physical scanning lines in one Frame of image is Data _ Phy _1Frame, then:
Data_Phy_1Frame = Data_Phy * SLN_Phy，
for a frame of image, the time taken by the hardware system from data acquisition to scan line gain realization, thard(s), is divided into 2 parts, the data acquisition time, tsample(s), and the data transmission time, ttrans(s), then:
Thard = Tsample + Ttrans，
wherein Tsample = Data _ Phy _1 Frame/Fs/N =2 Depth/V SLN _ Phy,
if the Data transmission rate is DataRate (bps), Ttrans = Data _ Phy _1 Frame/DataRate.
Therefore, the consumption time of a frame of 2D image on a hardware system is:
Thard = 2*Depth/V * SLN_Phy + 2*Depth/V*Fs*N* SLN_Phy/ DataRate
=2*Depth/V * SLN_Phy*(1+Fs*N/DataRate)。
the 3D/4D volume Rate refers to a display refresh Rate Vol _ Rate of a 3D image on a screen, which is inversely proportional to a complete processing time T3D(s) of one 3D volume data. Including hardware level elapsed time thard(s) and software level elapsed time tsoft(s).
Vol_Rate = 1/ T3d
=1/(Thard + Tsoft)
The scan line gain processing, 3D reconstruction, and display refresh described above are all accounted for within the software-level elapsed time Tsoft.
It can be seen that the volume fraction is dependent on Thard and Tsoft, the smaller the time spent at the hardware or software level, the higher the volume fraction. Each time Tsoft is almost the same, so Tsoft can be considered fixed, so the method of the present invention can automatically adjust Thard through a hardware system to realize intelligent switching of Vol _ Rate.
From the above mathematical relationship, it can be seen that:
Thard =2*Depth/V * SLN_Phy*(1+Fs*N/DataRate)
here, Depth is set by an operator, and V is an acoustic physical quantity, and hardware adjustment and change cannot be performed. Therefore, the hardware parameters are SLN _ Phy, Fs, N and DataRate, and the volume rate is adjusted by adjusting the SLN _ Phy, Fs, N and DataRate.
The ultrasonic imaging hardware system is provided with a main control chip, including but not limited to an FPGA, a DSP, an MCU and the like, which can control all chips of the hardware system according to clock beats, and the system is operated to realize imaging by initiating parallel or serial data streams to the chips. The data stream contains control instructions and register values required by each chip during scanning and imaging of the ultrasonic system.
When the software issues the target volume rate to the main control chip, the main control chip can calculate the extreme point and the upper and lower limit ranges of the volume rate under the change of a plurality of parameters according to the formula and the default initial value. The method comprises the following two steps: firstly, calculating an extreme point and a boundary value range of the volume ratio under the change of a single parameter; and calculating the extreme point and the boundary value range of the volume ratio under the change of all the parameters.
The specific steps of calculating the extreme point of the volume ratio and the boundary value range under the change of a single parameter are as follows: first, one hardware parameter is changed, and other hardware parameters are fixed, for example: and (3) the SLN _ Phy changes, Fs, N and DataRate are fixed, a main control chip is used for solving an extreme point according to a unitary function, finally, the volume rate corresponding to the upper boundary and the lower boundary in the change range of the SLN _ Phy is calculated, and the volume rate corresponding to the upper boundary and the lower boundary in the change range of the Fs, N and DataRate is calculated sequentially according to the steps.
The specific steps of calculating the extreme point of the volume ratio and the boundary value range under all parameter changes are as follows: the calculation circuit of the single parameter is made into a functional module, each parameter uses a module, and a plurality of parallel modules calculate together. If there are M ways, the operation time can be 1/M again.
The extreme points and the boundary ranges obtained by the plurality of parameters can be combined into one extreme range section and one boundary section.
And (3) according to the stepping of the clock period, converting the whole extreme value range interval and the whole boundary interval into grids, executing hardware calculation on each grid point, and outputting the volume rate result under the corresponding parameters SLN _ Phy, Fs, N and DataRate.
And arranging the parameters and volume rate results of all the grid points in the order of the volume rate from small to large, recording and storing the parameters and the volume rate results in a hardware cache chip.
In one embodiment, the volume rate is determined by the parameters, and for any set of determined parameters that is input, the main control chip finds the corresponding volume rate in the cache. If the volume rate meets the requirement, the main control chip changes the parameters into control instructions and register values for other chips, and the hardware system is operated according to the corresponding volume rate.
In one embodiment, the parameter is determined by the volume ratio, and for any volume ratio to be realized, the main control chip searches the exact value corresponding to the parameter in the cache.
According to the invention, the effective data volume is compressed by automatically adjusting a plurality of hardware parameters according to the target volume rate without changing the angle scanning parameters, and the hardware processing time is reduced, so that the intelligent variable volume rate is realized.
Claims (7)
1. A method of adjusting a volume rate based on ultrasound hardware, comprising the steps of: step S01: when the software issues the target volume rate to the main control chip, the main control chip can calculate the extreme point and the upper and lower limit ranges of the volume rate under the change of hardware parameters according to a formula and a default initial value; the hardware parameters include SLN Phy, Fs, N, and DataRate, step S02: arranging the volume rate results obtained in the step S01 according to the sequence of the volume rates from small to large, recording the volume rate results and the hardware parameters corresponding to each volume rate and storing the volume rate results and the hardware parameters in a hardware cache chip; step S03: the required volume ratio is realized by adjusting hardware parameters, and the formula is as follows: vol _ Rate =1/(Thard + Tsoft), where Vol _ Rate refers to the display refresh Rate of the 3D image on the screen, Thard is the elapsed time on the hardware level, Tsoft is the elapsed time on the software level, Thard =2 Depth/V SLN _ Phy (1+ Fs N/DataRate), Depth is set by the operator, V is the acoustic physical quantity, and Tsoft is assumed to be constant.
2. The method of claim 1, wherein: in step S01, the method for calculating the extremum point of the volume fraction under the variation of the hardware parameter and the upper and lower limit ranges includes: the first step is as follows: calculating the extreme point and boundary value range of the volume ratio under the change of a single parameter; the second step is that: the extremum points and boundary value ranges of the volume ratios under all parameter variations are calculated.
3. The method of claim 1, wherein: tsoft includes scan line gain processing, 3D reconstruction, display refresh time.
4. The method of claim 2, wherein: in the first step, one of the parameters is changed, the other three parameters are fixed, a main control chip is used for solving an extreme point according to a unitary function, and the volume ratios corresponding to the upper boundary and the lower boundary in the change range are calculated; then changing a variable parameter, and sequentially calculating the volume ratio corresponding to the upper boundary and the lower boundary in the variable range of each parameter.
5. The method of claim 2, wherein: in the second step, the calculation circuit of the single parameter is made into a functional module, each parameter uses a module, a plurality of parallel modules are used for calculating together, the extreme points and the boundary ranges obtained by a plurality of parameters are combined into an extreme value range interval and a boundary interval, the whole extreme value range interval and the whole boundary interval are changed into grids according to the stepping of the clock period, hardware calculation is carried out on each grid point, and the volume ratio result under the corresponding parameter is output.
6. The method of any one of claims 1 to 5, wherein; in step S03, for any input set of determined parameters, the main control chip finds out the corresponding volume ratio in the cache, and if the volume ratio meets the requirement, the main control chip changes the parameters into control instructions and register values for other chips, and operates the hardware system to operate according to the corresponding volume ratio.
7. The method of any one of claims 1 to 5, wherein: in step S03, for any volume ratio to be realized, the main control chip finds out an exact value corresponding to the parameter in the cache.
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| JP2008206748A (en) * | 2007-02-27 | 2008-09-11 | Toshiba Corp | Ultrasonic diagnostic apparatus and ultrasonic diagnostic program |
| JP2008289858A (en) * | 2007-04-23 | 2008-12-04 | Toshiba Corp | Ultrasonograph and its control method |
| US20100022890A1 (en) * | 2006-12-01 | 2010-01-28 | Panasonic Corporation | Ultrasonographic device |
| JP5985007B1 (en) * | 2015-06-02 | 2016-09-06 | 株式会社日立製作所 | Ultrasonic diagnostic equipment |
| CN111110276A (en) * | 2019-12-19 | 2020-05-08 | 深圳市德力凯医疗设备股份有限公司 | Signal overload protection method in ultrasonic equipment, storage medium and ultrasonic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100022890A1 (en) * | 2006-12-01 | 2010-01-28 | Panasonic Corporation | Ultrasonographic device |
| JP2008206748A (en) * | 2007-02-27 | 2008-09-11 | Toshiba Corp | Ultrasonic diagnostic apparatus and ultrasonic diagnostic program |
| JP2008289858A (en) * | 2007-04-23 | 2008-12-04 | Toshiba Corp | Ultrasonograph and its control method |
| JP5985007B1 (en) * | 2015-06-02 | 2016-09-06 | 株式会社日立製作所 | Ultrasonic diagnostic equipment |
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Effective date of registration: 20220913 Address after: 21st Floor, Block B, Phase I, Zhongdan Ecological Life Science Industrial Park, No. 3-1, Xinjinhu Road, Jiangbei New District, Nanjing City, Jiangsu Province, 210000 Patentee after: JIANGSU TINGSN TECHNOLOGY Co.,Ltd. Address before: Room 2110, block B, phase I, Zhongdan Life Science Industrial Park, No. 3-1, xinjinhu Road, Jiangbei new area, Nanjing, Jiangsu 210000 Patentee before: Nanjing tingsheng Medical Technology Co.,Ltd. |