WO2005117709A1 - 超音波診断装置 - Google Patents
超音波診断装置 Download PDFInfo
- Publication number
- WO2005117709A1 WO2005117709A1 PCT/JP2005/010082 JP2005010082W WO2005117709A1 WO 2005117709 A1 WO2005117709 A1 WO 2005117709A1 JP 2005010082 W JP2005010082 W JP 2005010082W WO 2005117709 A1 WO2005117709 A1 WO 2005117709A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- low
- frequency
- signal
- echo signal
- ultrasonic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52025—Details of receivers for pulse systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52077—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging with means for elimination of unwanted signals, e.g. noise or interference
Definitions
- the present invention relates to an ultrasonic diagnostic apparatus that transmits an ultrasonic pulse toward a living body and combines the received signals of the reflected waves from the living body to obtain an ultrasonic tomographic image.
- a drive pulse is applied from a drive circuit to an ultrasonic vibrator, an ultrasonic wave is transmitted from the ultrasonic vibrator to a target portion, and an echo signal from the target portion is transmitted to the ultrasonic vibrator.
- an apparatus that receives image data, performs processing such as amplification, addition, and log compression to obtain image data, sends the image data to a monitor, and displays a desired diagnostic image on the monitor ( For example, see Patent Document 1 below).
- FIG. 6 is a block diagram showing a schematic configuration of an ultrasonic transmission / reception unit and a signal conversion unit in the ultrasonic signal processing device and the ultrasonic diagnostic device for converting an analog reception signal into a digital signal.
- the transmission / reception unit and the signal conversion unit transmit an ultrasonic wave and receive an echo signal.
- An ultrasonic vibrator 1 transmits a driving pulse to the ultrasonic vibrator 1 in accordance with a trigger signal.
- the AZD converter 4 converts the echo signal obtained from the received signal into a digital signal and outputs the digital signal.
- the resolution (number of bits) of the AZD translator 4 is insufficient (bits). (Small numbers). Therefore, in an actual ultrasonic diagnostic apparatus, a preamplifier (not shown) and a variable gain amplifier (VCA) are connected between the ultrasonic transducer 1 and the AZD transformer 4. The dynamic range is controlled by controlling the amplitude of the echo signal, and the echo signal is input to the AZD converter 4.
- Patent Document 1 JP-A-6-154210 (paragraph 0011, FIG. 1)
- Patent Document 2 JP-A-6-313764 (paragraph 0008, FIG. 1)
- Patent Document 3 JP-A-7-171152 (paragraph 0023, FIG. 1)
- the ultrasonic vibrator 1 immediately after the drive circuit 2 transmits a large-amplitude pulse to drive the ultrasonic vibrator 1, the ultrasonic vibrator 1 is configured. Ringing with low frequency components occurs due to the influence of the piezoelectric element and cable. For this reason, as shown in Fig. 7, the shallow echo signal obtained immediately after driving with the transmission pulse is superimposed with ringing of large amplitude noise, so that the shallow echo signal is not lost.
- the AZD converter 4 In order to input to the AZD converter 4 within the range of the input upper and lower limits indicated by the arrows, it is necessary to use a large number of bits and the AZD transformer 4 to lower the gain in the shallow part.
- the resolution of the AZD variable that can be realized at low cost is about 12 bits, which can handle only a dynamic range of about 60 dB.
- the number of bits is insufficient to handle the echo signal with the ringing superimposed.
- the above-described ultrasonic signal processing apparatus and ultrasonic diagnostic apparatus have a problem in that the force configuration, which improves this problem, is complicated and large and expensive.
- the present invention has been made to solve the above-described problems of the conventional apparatus, and has an object to provide a small-sized, inexpensive ultra-high-sensitivity, wide-dynamic-range, ultra-high-resolution AZD converter without the need for high-resolution AZD transformation.
- An ultrasonic diagnostic apparatus is provided.
- the invention according to claim 1 drives an ultrasonic vibrator that transmits and receives ultrasonic waves with a drive circuit that generates a pulse signal, and the ultrasonic vibrator receives the ultrasonic signals.
- the input echo signal is input to an analog low-frequency attenuator to attenuate low-frequency components, and the output signal of this analog low-frequency attenuator is input to an AZD converter and converted to a digital signal, which is converted and output.
- the digital signal is input to the digital correction filter, and the low-frequency component attenuated by the analog low-frequency attenuator is enhanced to almost match the echo signal received by the ultrasonic transducer. It is configured to output a digital signal having an equal frequency distribution.
- the invention according to claim 2 is an analog low-frequency attenuator, which amplifies an echo signal received by the ultrasonic transducer with a preamplifier and attenuates a low-frequency component with a power low-frequency attenuation filter.
- the variable gain amplifier is configured to correct the attenuation of the echo signal.
- FIG. 1 is a block diagram showing a schematic configuration of an ultrasonic transmission / reception unit and a signal conversion unit in an embodiment of an ultrasonic diagnostic apparatus according to the present invention.
- FIG. 2 is a block diagram showing a detailed configuration of an analog low-frequency attenuator constituting an embodiment of the present invention.
- FIG. 3 is a diagram showing a signal waveform of a signal added to AZD transformation to explain the operation of the embodiment of the present invention.
- FIG. 4A is a diagram for explaining an operation of the exemplary embodiment of the present invention, and is a diagram illustrating a frequency characteristic of a low-pass attenuation filter.
- FIG. 4B is a diagram for explaining the operation of the embodiment of the present invention, and is a diagram showing the frequency characteristics of the digital correction filter.
- FIG. 5A is a diagram showing an example of a frequency distribution of an echo signal obtained by receiving an ultrasonic transducer as an input of a low-frequency attenuator, for explaining an operation of the embodiment of the present invention.
- FIG. 5B is a diagram showing an example of a frequency distribution of an echo signal that has passed through an analog low-frequency attenuator as an output of the low-frequency attenuator in order to explain the operation of the embodiment of the present invention.
- FIG. 5C is a diagram showing an example of a frequency distribution of an echo signal in which low-frequency components are enhanced by a digital correction filter as an output of the digital correction filter, for explaining an operation of the embodiment of the present invention.
- FIG. 5D is a diagram showing a signal waveform of an echo signal obtained by reception by the ultrasonic vibrator to explain the operation of the embodiment of the present invention.
- FIG. 5E is a diagram showing a signal waveform of an echo signal that has passed through an analog low-frequency attenuator, for explaining an operation of the exemplary embodiment of the present invention.
- FIG. 5F is a diagram showing a signal waveform of an echo signal in which a low-frequency component is enhanced by a digital correction filter in order to explain an operation of the embodiment of the present invention.
- FIG. 6 is a block diagram showing a schematic configuration of an ultrasonic transmission / reception unit and a signal conversion unit in a conventional ultrasonic signal processing device or ultrasonic diagnostic device.
- FIG. 7 is a diagram showing an echo signal waveform applied to the AZD transformation to explain the operation of a conventional ultrasonic signal processing device or ultrasonic diagnostic device.
- FIG. 1 is a block diagram showing a schematic configuration of an ultrasonic transmission / reception unit and a signal conversion unit in an embodiment of an ultrasonic diagnostic apparatus according to the present invention.
- the transmission / reception unit and the signal conversion unit include an ultrasonic transducer 1 for transmitting ultrasonic waves and receiving an echo signal, a driving circuit 2 for transmitting a drive pulse to the ultrasonic transducer 1 according to a trigger signal, and an ultrasonic transducer.
- the echo signal received at 1 is input and the analog low-frequency attenuator 3 that attenuates and outputs the low-frequency component, and the echo signal that has passed through the analog low-frequency attenuator 3 is input and AZD-converted and output AZD transposition 4 and analog low-frequency attenuator 3 have the opposite frequency characteristics, that is, the low-frequency components are enhanced, and the echo signal is restored to almost flat frequency spectrum distribution characteristics from low to high frequencies.
- a digital correction filter 5 for outputting.
- FIG. 2 is a block diagram showing a detailed configuration of the analog low-frequency attenuator 3.
- the preamplifier 31 amplifies the echo signal received by the ultrasonic transducer 1, and the preamplifier 31 amplifies the echo signal.
- a low-frequency attenuation filter 32 that receives the echo signal that is input and attenuates the low-frequency component and outputs the same, and an echo signal that is output from the low-frequency attenuation filter 32 and attenuates the echo signal according to the propagation time.
- a variable gain amplifier 33 that corrects and outputs the result.
- the ultrasonic vibrator 1 When the ultrasonic vibrator 1 is driven by a large-amplitude pulse by the drive circuit 2, a signal in which ringing is superimposed on an echo signal is applied to the analog low-frequency attenuator 3 as shown in FIG. Since the analog low-frequency attenuator 3 includes the low-frequency attenuating filter 32, the ringing having a low frequency component shown in FIG. 7 is removed, and as shown in FIG. The suppressed echo signal is input to AZD transformer 4. Then, the signal is converted into a digital signal by the AZD converter 4 and is filtered by the digital correction filter 5.
- the digital correction filter 5 enhances and outputs the low-frequency component attenuated by the low-frequency attenuation filter 32. Thereby, a digital echo signal waveform having the same frequency distribution as the signal waveform input to the analog low-frequency attenuator 3 is obtained.
- the echo signal received by the ultrasonic transducer 1 is amplified by the preamplifier 31, and the low-frequency component is attenuated by the power filter low-frequency attenuation filter 32.
- the variable gain amplifier 33 corrects the attenuation of the echo signal according to the propagation time.
- FIG. 4 ⁇ is a diagram showing the frequency characteristic of the low-frequency attenuation filter 32, that is, the relationship between the frequency and the gain.
- the low-frequency attenuation filter 32 has a substantially constant low gain in the low frequency band, The gain increases at a predetermined rate in the middle frequency band, and has a nearly constant high gain in the high frequency range.
- Fig. 4 ⁇ is a graph showing the frequency characteristic of the digital correction filter 5, that is, the relationship between frequency and gain.
- the gain has almost constant high gain in the low frequency range and the middle frequency band.
- the digital correction filter 5 is an inverse filter with respect to the low frequency attenuation filter 32.
- FIG. 5A illustrates the frequency distribution of echo signals received and received by the ultrasonic transducer 1, and it is assumed that the echo signals are distributed as a curve R.
- this echo signal passes through the analog low-frequency attenuator 3, the low-frequency component decreases and changes to a distribution as shown by the curve S, as shown in FIG. Thereafter, the low-frequency component is enhanced by the digital correction filter 5, so that the low-frequency component is compensated and restored to the original frequency distribution as shown by the curve ⁇ , as shown in FIG. 5C.
- the signal waveform shown in FIG. 5D is deformed by the analog low-frequency attenuator 3 as shown in FIG. 5 ⁇ , and is output from the digital correction filter 5, the original signal as shown in FIG. The waveform is restored.
- an actual ultrasonic diagnostic apparatus includes a preamplifier and a variable gain amplifier between the ultrasonic transducer 1 and the AZD converter 4 as described above, in the present embodiment, analog low-frequency attenuation is provided. Since the amplifier 3 has a configuration in which the preamplifier 31, the low-pass attenuation filter 32, and the variable gain amplifier 33 are sequentially connected, a good SN ratio can be secured. Also, since the signal after attenuating the low frequency component has a low dynamic range, the gain variable width of the variable gain amplifier 33 can be smaller than that of the signal without attenuating the low frequency component. Is also obtained.
- the signal in which the echo signal and the large-amplitude pulse are superimposed is passed through the analog low-frequency attenuator 3 to remove the low-frequency ringing component, and Dynamic range can be reduced and input to AZD4.
- the digital correction filter 5 is configured to enhance the low-frequency component of the echo signal of the digital data after passing through the AZD converter 4, thereby canceling out the effect of the analog low-frequency attenuator 3.
- the original waveform of the echo signal can be restored to the original waveform, and the information of the shallow echo signal can be taken into the AZD transformer 4 without saturating.
- a low-resolution AZD transformer and variable gain amplifier are used. It is possible to provide a small and inexpensive ultrasonic diagnostic apparatus which is excellent in outputting image information in a shallow part.
- the ultrasonic diagnostic apparatus of the present invention is useful in the technical field of obtaining an ultrasonic tomographic image of a subject.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/569,828 US8403853B2 (en) | 2004-06-02 | 2005-06-01 | Ultrasonic diagnostic apparatus |
DE112005001280T DE112005001280B4 (de) | 2004-06-02 | 2005-06-01 | Ultraschalldiagnosegerät |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-164862 | 2004-06-02 | ||
JP2004164862A JP4444008B2 (ja) | 2004-06-02 | 2004-06-02 | 超音波診断装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005117709A1 true WO2005117709A1 (ja) | 2005-12-15 |
WO2005117709A8 WO2005117709A8 (ja) | 2006-12-21 |
Family
ID=35462692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/010082 WO2005117709A1 (ja) | 2004-06-02 | 2005-06-01 | 超音波診断装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8403853B2 (ja) |
JP (1) | JP4444008B2 (ja) |
CN (1) | CN100441150C (ja) |
DE (1) | DE112005001280B4 (ja) |
WO (1) | WO2005117709A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102245108A (zh) * | 2009-08-18 | 2011-11-16 | 松下电器产业株式会社 | 超声波诊断装置 |
WO2013148859A1 (en) * | 2012-03-27 | 2013-10-03 | Texas Instruments Incorporated | Ultrasonic receiver front-end |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8078918B2 (en) * | 2008-02-07 | 2011-12-13 | Siliconsystems, Inc. | Solid state storage subsystem that maintains and provides access to data reflective of a failure risk |
US9189083B2 (en) * | 2008-03-18 | 2015-11-17 | Orthosensor Inc. | Method and system for media presentation during operative workflow |
JP5235477B2 (ja) | 2008-04-14 | 2013-07-10 | キヤノン株式会社 | 超音波による画像形成方法及び超音波装置 |
JP5395371B2 (ja) * | 2008-06-18 | 2014-01-22 | 株式会社東芝 | 超音波診断装置、超音波画像の取得方法及びプログラム |
KR101263831B1 (ko) | 2011-09-19 | 2013-05-13 | 삼성메디슨 주식회사 | 진단영상 생성장치, 프로브, 프로브를 제어하는 방법 및 진단영상을 생성하는 방법 |
EP2949273A4 (en) * | 2013-01-23 | 2016-11-09 | Olympus Corp | AN ECHOGRAPHIC OBSERVATION DEVICE, A METHOD FOR OPERATING AN ECHOGRAPHIC OBSERVATION DEVICE, AND A PROGRAM FOR OPERATING AN ECHOGRAPHIC OBSERVATION DEVICE |
WO2014180932A1 (en) * | 2013-05-08 | 2014-11-13 | Ophthametrics Ag | An apparatus configurated to and a process to photoacousticall image and measure a structure at the human eye fundus |
KR102243037B1 (ko) | 2014-03-18 | 2021-04-21 | 삼성메디슨 주식회사 | 초음파 진단 장치 및 그 동작방법 |
CN110313940B (zh) * | 2019-08-01 | 2021-06-01 | 无锡海斯凯尔医学技术有限公司 | 信号衰减计算方法、装置、设备及计算机可读存储介质 |
CN113836855B (zh) * | 2021-08-30 | 2023-08-25 | 北京钛方科技有限责任公司 | 饱和信号特征修正方法、装置、电子设备和存储介质 |
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JPH05111486A (ja) * | 1991-10-23 | 1993-05-07 | Aloka Co Ltd | 超音波ドプラ診断装置 |
JPH09327461A (ja) * | 1996-06-11 | 1997-12-22 | Aloka Co Ltd | 超音波診断装置 |
JPH11169374A (ja) * | 1997-12-12 | 1999-06-29 | Aloka Co Ltd | 超音波ドプラ診断装置 |
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AU517998B2 (en) * | 1977-05-06 | 1981-09-10 | Commonwealth Of Australia, The | Signal processing system |
DE2724437B1 (de) * | 1977-05-31 | 1978-06-15 | Siemens Ag | Nach dem Impuls-Echo-Verfahren arbeitendes Ultraschall-Bildgeraet |
US5261280A (en) * | 1984-06-04 | 1993-11-16 | Stephen G. Matzuk | Tissue signature tracking transceiver |
MX9702434A (es) * | 1991-03-07 | 1998-05-31 | Masimo Corp | Aparato de procesamiento de señales. |
JPH04336056A (ja) * | 1991-05-10 | 1992-11-24 | Matsushita Electric Ind Co Ltd | 超音波ドプラ映像装置 |
JP2776153B2 (ja) * | 1992-06-30 | 1998-07-16 | 松下電器産業株式会社 | 超音波診断装置 |
JP3134618B2 (ja) | 1992-09-22 | 2001-02-13 | 株式会社日立メディコ | 超音波信号処理装置 |
JP3274194B2 (ja) | 1992-11-24 | 2002-04-15 | 株式会社東芝 | 超音波診断装置 |
JP2814900B2 (ja) * | 1993-12-07 | 1998-10-27 | 松下電器産業株式会社 | 超音波診断装置 |
JPH07171152A (ja) | 1993-12-17 | 1995-07-11 | Olympus Optical Co Ltd | 超音波診断装置 |
JPH07192398A (ja) * | 1993-12-27 | 1995-07-28 | Sharp Corp | 再生波形等化回路 |
WO2002050511A2 (en) * | 2000-12-18 | 2002-06-27 | E.I. Du Pont De Nemours And Company | Method and apparatus for ultrasonic sizing of particles in suspensions |
-
2004
- 2004-06-02 JP JP2004164862A patent/JP4444008B2/ja not_active Expired - Fee Related
-
2005
- 2005-06-01 DE DE112005001280T patent/DE112005001280B4/de not_active Expired - Fee Related
- 2005-06-01 WO PCT/JP2005/010082 patent/WO2005117709A1/ja active Application Filing
- 2005-06-01 US US11/569,828 patent/US8403853B2/en not_active Expired - Fee Related
- 2005-06-01 CN CNB2005800179769A patent/CN100441150C/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05111486A (ja) * | 1991-10-23 | 1993-05-07 | Aloka Co Ltd | 超音波ドプラ診断装置 |
JPH09327461A (ja) * | 1996-06-11 | 1997-12-22 | Aloka Co Ltd | 超音波診断装置 |
JPH11169374A (ja) * | 1997-12-12 | 1999-06-29 | Aloka Co Ltd | 超音波ドプラ診断装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102245108A (zh) * | 2009-08-18 | 2011-11-16 | 松下电器产业株式会社 | 超声波诊断装置 |
CN102245108B (zh) * | 2009-08-18 | 2015-03-25 | 柯尼卡美能达株式会社 | 超声波诊断装置 |
WO2013148859A1 (en) * | 2012-03-27 | 2013-10-03 | Texas Instruments Incorporated | Ultrasonic receiver front-end |
US9240814B2 (en) | 2012-03-27 | 2016-01-19 | Texas Instruments Incorporated | Ultrasonic receiver front-end |
Also Published As
Publication number | Publication date |
---|---|
JP2005342180A (ja) | 2005-12-15 |
DE112005001280B4 (de) | 2013-02-28 |
CN1972634A (zh) | 2007-05-30 |
US8403853B2 (en) | 2013-03-26 |
DE112005001280T5 (de) | 2007-06-06 |
US20070266791A1 (en) | 2007-11-22 |
WO2005117709A8 (ja) | 2006-12-21 |
JP4444008B2 (ja) | 2010-03-31 |
CN100441150C (zh) | 2008-12-10 |
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