WO2006057092A1 - 超音波撮像装置 - Google Patents
超音波撮像装置 Download PDFInfo
- Publication number
- WO2006057092A1 WO2006057092A1 PCT/JP2005/013153 JP2005013153W WO2006057092A1 WO 2006057092 A1 WO2006057092 A1 WO 2006057092A1 JP 2005013153 W JP2005013153 W JP 2005013153W WO 2006057092 A1 WO2006057092 A1 WO 2006057092A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ultrasonic
- transmission
- imaging apparatus
- pulse signal
- element array
- 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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/8993—Three dimensional imaging 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
- G01S7/52019—Details of transmitters
- G01S7/5202—Details of transmitters 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
- G01S7/52085—Details related to the ultrasound signal acquisition, e.g. scan sequences
- G01S7/5209—Details related to the ultrasound signal acquisition, e.g. scan sequences using multibeam transmission
-
- 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
- G01S7/52085—Details related to the ultrasound signal acquisition, e.g. scan sequences
- G01S7/52095—Details related to the ultrasound signal acquisition, e.g. scan sequences using multiline receive beamforming
-
- 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
-
- 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
- G01S7/52046—Techniques for image enhancement involving transmitter or receiver
Definitions
- the present invention relates to an ultrasonic imaging technique for imaging an inside of an ultrasonic wave by transmitting / receiving ultrasonic waves to / from a subject such as a living body.
- An ultrasonic diagnostic apparatus based on a pulse echo method for transmitting / receiving pulsed ultrasonic waves to / from a living body and imaging the inside thereof is widely used for medical diagnosis together with X-ray CT and MRI.
- X-ray CT and other diagnostic imaging modalities such as MRI.
- the greatest feature of ultrasound diagnosis is its high imaging speed that enables real-time image display. In other words, the temporal resolution of human vision is high imaging speed at which images can be updated approximately every 30 ms. Furthermore, it is even possible to achieve a time resolution that captures images every 15 ms for the purpose of diagnosing the movement of the heart valve by slow playback.
- the distance resolution in the depth direction is obtained by the resolution of the time required for the ultrasonic pulse to reciprocate between the reflectors.
- the propagation speed of ultrasonic waves in the living body is 1500 m / s, which is almost equal to that in water, so the ultrasonic frequency is several MHz or more.
- the spatial resolution in the direction orthogonal to this is obtained by focusing the transmitted or received wave.
- a strong focus is required so that the F-number becomes 1.
- the focal depth corresponding to the depth of field in the case of a camera is reduced to several wavelengths.
- This is equivalent to an ultrasonic round-trip propagation time of about 1 s, but recent advances in high-speed electronic circuit technology have made it possible to change the reception focal length while the ultrasonic wave travels this distance. .
- Patent Document 1 New Ultrasound Medicine, Part 1, Basics of Medical Ultrasound, May 15, 2000, pp. 40-41
- an object of the present invention is to provide an ultrasonic imaging technique capable of forming a transmission beam that enables multi-beam transmission / reception with the same transmission / reception sensitivity.
- each of the divided apertures is driven by supplying a transmission signal with opposite signs obtained by dividing the transmission aperture into two and inverting the phase to each aperture.
- a positive and negative sound pressure distribution that is point-symmetric with respect to the central axis as shown in Fig. 3 (b) is formed on the focal plane, and the ultrasonic intensity distribution is shown in Fig. 3 (a).
- Two lobes are formed that are line-symmetric with respect to the central axis as shown in.
- the transmission beam As a method of forming a transmission beam whose beam width is substantially constant regardless of the distance of the probe force, when forming a transmission wavefront having a non-cylindrical surface or an aspherical shape using a one-dimensional array, the transmission beam A method of optimizing the transmission wavefront so that the width is almost constant is known (reference: Proceedings of 2002 IEEE Ultrasonics Symposium, vol. 2, pp. 1721-172 4). This is because the local focal length on the transmission aperture is shorter at the center of the transmission aperture. The length is set longer in the part, and the length is gradually changed, in other words, the wavefront force of the ultrasonic pulse signal transmitted from the transmission aperture.
- the curvature of the central part of the transmission aperture is the curvature of the part other than the central part. It is a method realized by controlling to become larger.
- a transmitted sound field with an ultrasonic frequency of 3 MHz was shown.
- the Gaussian function type weight attached to the transmission aperture is also shown.
- a main lobe of uniform width is formed over a wide range in the propagation direction.
- the width is uniform in the depth direction, the cross-section of the beam at one depth is as shown in Fig. 2, and there are two equal transmission sensitivity points, and no force can be obtained. Therefore, this method cannot be solved by simply adopting this method as it is.
- the present invention develops such a method and adopts a technique of a split-focus method, so that a linear transmission / reception with equal transmission sensitivity and suitable for an imaging scanning line is achieved. It is possible to form 4 beams simultaneously for 2D imaging with a 1D transducer array and 16 beams for 3D imaging with a 2D transducer array.
- the imaging scanning lines are parallel straight lines in the case of linear scanning, radial straight lines having a common intersection outside the imaging range in the case of competitive scanning, and in the case of sector scanning. A group of radial lines with a common intersection at one end of the imaging range.
- the ultrasonic imaging apparatus having a wave transmitting means for transmitting an ultrasonic pulse signal from the ultrasonic element array to the object to be inspected, and a wave receiving means for receiving the ultrasonic pulse reflected by the object to be inspected
- the wave transmitting means has a plurality of peaks having substantially the same transmission intensity in the azimuth direction, and the locus of each peak in the depth direction. Is configured to transmit an ultrasonic pulse signal substantially in a straight line from the transmission aperture of the ultrasonic element array to the object to be inspected.
- the transmission means controls the weighting of the transmission aperture of the ultrasonic element array and the local focal length on the ultrasonic element array.
- the wave transmitting means controls the weighting of the transmission aperture of the ultrasonic element array and the local focal length on the ultrasonic element array.
- An ultrasonic pulse signal having a plurality of peaks with substantially equal transmission intensities in the azimuth direction and a locus in the depth direction of each peak being substantially straight is formed from the transmission aperture to the object to be inspected. It is characterized by being configured to transmit.
- the wave transmitting means forms a wave front of the ultrasonic pulse signal transmitted from the transmission aperture so as to form a non-cylindrical surface or an aspheric surface.
- a delay time weight for controlling a delay time of a drive signal for driving each ultrasonic element constituting the transmission aperture, and a plurality of focal points are formed on each focal plane at positions of a plurality of focal lengths.
- the ultrasonic pulse signal is transmitted using an amplitude weight for controlling a signed amplitude of a drive signal for driving the ultrasonic element.
- an ultrasonic diagnostic apparatus capable of forming a transmission beam that enables multi-beam transmission / reception, such as transmission sensitivity.
- FIG. 6 is a block diagram showing a typical configuration of an apparatus in which the present invention is applied to an ultrasonic diagnostic apparatus based on the pulse echo method.
- the transmission / reception sequence control unit 6 transmits a plurality of transmission beams having the same transmission sensitivity suitable for high-speed imaging, or transmits a transmission beam having a good resolution and SZN ratio only near a specific focal length. Select. Based on the selection, the transmission focus delay / weight data selection unit 4 selects the corresponding transmission focus delay data and waveform weight data from the transmission focus delay / weight data memory 5.
- the transmission focus delay / weight data memory 5 includes, for example, three-dimensional linear scanning (5-1), three-dimensional sector scanning (5-2), two-dimensional linear scanning (5-3), 2 Transmission focus delay / weight data for dimension sector scanning (5-4) is recorded in advance, and one set of data is selected by the transmission focus delay / weight data selection unit 4.
- the transmission beamformer 3 configures an ultrasonic transducer array (ultrasonic probe) 1 at a controlled timing based on the data, with a transmission signal given a signed amplitude corresponding to the transmission waveform.
- Element group force to be supplied to each element selected by the element selection switching switch group 2 to drive those elements. As a result, a transmission wavefront having directivity is transmitted into the living body.
- each signal of the element selected by the element selection switching switch group 2 is input to the receiving beamformer 10.
- the input signal from each element is amplified by a preamplifier, A / D converted, and stored in a memory. More specifically, it is common to perform AZD conversion immediately after the preamplifier, after passing through a TGC amplifier controlled so that the amplification factor gradually increases according to the elapsed time from transmission.
- the envelope signal detector 12 After passing through the filter 11, the envelope signal detector 12 detects the envelope signal from the output signal of the receiving beam former 10, and this is logarithmically compressed to obtain a display signal. This is converted by a scan converter 13 into a two-dimensional image or, in some cases, a three-dimensional image, and displayed on a display 14 using a CRT or liquid crystal.
- FIG. 7 shows a transmission sound field formed for linear scanning using a one-dimensional array transducer.
- the transmission aperture weight is a weight obtained by differentiating the Gaussian function once as shown in the figure.
- This weight function w (x) is for the coordinate X on the array, excluding the normalization constant.
- the local focal length is set to 40 mm at the center of the transmission aperture as shown in Fig. 5, and toward the end of the aperture.
- the length was gradually extended to a Lorenz resonance function type, and 160 mm at both ends of the transmission aperture.
- the focal length was changed to the Lorentz function shown in Eq. (1).
- FIG. 8 shows a transmission sound field formed for sector scanning using a one-dimensional array transducer.
- the transmission aperture weight and local focal length were changed to a differential Gaussian function and a Lorentz resonance function, respectively, as in the case of FIG.
- the parameter of the differential Gaussian function that determines the expansion of the transmission aperture weight the parameter ⁇ of the differential Gaussian function that determines the change in local focal length
- the parameter of the one-lentz resonance function a
- two lobes with a constant angle parallel to the scanning line of the sector scan could be formed over a distance of 50 mm to 180 mm.
- four scanning lines for sector scanning can be obtained with the same transmission sensitivity.
- the scanning line array for the force scanning that is omitted here is between the linear scanning and the sector scanning. Therefore, by adjusting the transmission aperture weight and the local focal length, a lobe parallel to the scanning line for the competitive scanning is obtained. Needless to say, the transmission beam can be formed.
- the weighting of the transmission aperture is configured based on the Gaussian function
- the control of the local focal length is configured based on the Lorentz function.
- the present invention is not limited to these. , That's ugly! /.
- FIGS. 9 and 10 show a transmission formed for sector scanning using a two-dimensional array transducer. It is a sound field.
- the transmission aperture weight is basically the same as the case of Figs. 7 and 8.
- a force function with a weight product obtained by differentiating the force Gaussian function once was used.
- This weighting function w (x, y) is excluding standard constants when the coordinates on the array are X and y.
- FIG. 9 shows the ultrasonic intensity distribution of four lobes at a distance of 80 mm for the sector scanning transmission beam when performing three-dimensional imaging using a two-dimensional array transducer.
- Fig. 10 shows the ultrasonic intensity distribution in the propagation distance direction as a function of distance for the diagonal cross section of this transmission beam for sector scanning.
- FIG. 11 is a diagram showing a positional relationship between four lobes and 16 equal transmission sensitivity transmission / reception beams formed when performing three-dimensional imaging using a two-dimensional array transducer.
- 16 sector scanning scanning lines having substantially the same transmission sensitivity can be obtained. it can .
- Such a transmission beam that enables multi-beam transmission / reception with equal transmission sensitivity is particularly suitable for three-dimensional ultrasonic imaging of the heart or the like that requires high-speed imaging.
- four transmission / reception beams such as transmission sensitivity are formed by one transmission beam for two-dimensional imaging using a one-dimensional array probe.
- 16 transmit and receive beams with the same transmission sensitivity for each transmit beam. Beams can be formed to achieve high-speed image data acquisition required for 3D imaging.
- the ultrasonic imaging technology according to the present invention makes it possible to further emphasize the high speed characteristic of ultrasonic imaging while maintaining high image quality, and particularly high speed is required. Very suitable for 3D imaging of the heart. Therefore, it can be said that the present invention has great significance in medicine and industry.
- FIG. 1 is a diagram showing a positional relationship between a conventional transmission beam and two transmission / reception beams.
- FIG. 2 is a diagram showing a positional relationship between a conventional transmission beam and four transmission / reception beams.
- FIG. 3 Diagram showing the positional relationship between the transmit beam and four transmit / receive beams using the split 'focus technology.
- FIG. 4 A diagram showing the ultrasonic intensity distribution of a transmission beam by split 'focus technology.
- FIG. 5 is a diagram showing an ultrasonic intensity distribution of a transmission beam by a non-cylindrical surface focusing technique.
- FIG. 6 is a block diagram showing a configuration of an ultrasonic diagnostic apparatus according to an embodiment of the present invention.
- FIG. 7 is a diagram showing an ultrasonic intensity distribution (including a transmission aperture weight and a local focal length) of a linear scanning transmission beam according to the present invention.
- FIG. 8 is a diagram showing an ultrasonic intensity distribution (including a transmission aperture weight and a local focal length) of a transmission beam for sector scanning according to the present invention.
- FIG. 9 is a diagram showing an ultrasonic intensity distribution at a distance of 80 mm for a sector scanning transmission beam when performing three-dimensional imaging using a two-dimensional array transducer according to the present invention.
- FIG. 10 is a diagram showing an ultrasonic intensity distribution in a propagation distance direction in a diagonal section of a transmission beam for sector scanning when performing three-dimensional imaging using a two-dimensional array transducer according to the present invention.
- FIG. 11 is a diagram showing the positional relationship between four lobes and 16 equal transmission sensitivity transmission / reception beams formed when performing three-dimensional imaging using a two-dimensional array transducer according to the present invention.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/719,770 US8535229B2 (en) | 2004-11-24 | 2005-07-15 | Ultrasonographic device |
EP05762004A EP1815795B1 (en) | 2004-11-24 | 2005-07-15 | Ultrasonographic device |
JP2006547646A JP4643591B2 (ja) | 2004-11-24 | 2005-07-15 | 超音波撮像装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-338592 | 2004-11-24 | ||
JP2004338592 | 2004-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006057092A1 true WO2006057092A1 (ja) | 2006-06-01 |
Family
ID=36497838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/013153 WO2006057092A1 (ja) | 2004-11-24 | 2005-07-15 | 超音波撮像装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8535229B2 (ja) |
EP (1) | EP1815795B1 (ja) |
JP (1) | JP4643591B2 (ja) |
CN (1) | CN100574707C (ja) |
WO (1) | WO2006057092A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009279306A (ja) * | 2008-05-26 | 2009-12-03 | Fujifilm Corp | 超音波診断装置 |
JP2010099466A (ja) * | 2008-09-29 | 2010-05-06 | Toshiba Corp | 超音波診断装置及び超音波送受信方法 |
WO2019176232A1 (ja) * | 2018-03-16 | 2019-09-19 | 株式会社日立製作所 | 超音波診断装置及び送信制御方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8253779B2 (en) * | 2000-10-11 | 2012-08-28 | University of Pittsbugh—Of The Commonwealth System of Higher Education | System for remote guidance by expert for imaging device |
US9846235B2 (en) * | 2012-08-09 | 2017-12-19 | Israel Aerospace Industries Ltd. | Friend or foe identification system and method |
CN106461765B (zh) * | 2014-06-13 | 2019-12-31 | B-K医疗公司 | 三维(3d)和/或四维(4d)超声成像 |
WO2016081321A2 (en) | 2014-11-18 | 2016-05-26 | C.R. Bard, Inc. | Ultrasound imaging system having automatic image presentation |
CN106999146B (zh) | 2014-11-18 | 2020-11-10 | C·R·巴德公司 | 具有自动图像呈现的超声成像系统 |
CN111480183B (zh) * | 2017-11-20 | 2023-08-08 | 上海科技大学 | 用于产生透视效果的光场图像渲染方法和系统 |
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JP2003010181A (ja) * | 2001-04-25 | 2003-01-14 | Medison Co Ltd | 直交ゴレーコードを用いる超音波撮像方法及びその装置 |
JP2004113694A (ja) * | 2002-09-30 | 2004-04-15 | Fuji Photo Film Co Ltd | 超音波撮像装置及び超音波撮像方法 |
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US6066099A (en) * | 1998-11-23 | 2000-05-23 | General Electric Company | Method and apparatus for high-frame-rate high-resolution ultrasonic image data acquisition |
US6312386B1 (en) * | 1999-02-19 | 2001-11-06 | Acuson Corporation | Medical ultrasound imaging system with composite delay profile |
JP4022393B2 (ja) * | 2001-12-12 | 2007-12-19 | 株式会社日立メディコ | 超音波診断装置 |
US6673016B1 (en) * | 2002-02-14 | 2004-01-06 | Siemens Medical Solutions Usa, Inc. | Ultrasound selectable frequency response system and method for multi-layer transducers |
JP2004089311A (ja) * | 2002-08-30 | 2004-03-25 | Fuji Photo Film Co Ltd | 超音波送受信装置 |
JP4244300B2 (ja) * | 2003-03-24 | 2009-03-25 | 富士フイルム株式会社 | 超音波送受信装置 |
-
2005
- 2005-07-15 EP EP05762004A patent/EP1815795B1/en not_active Expired - Fee Related
- 2005-07-15 US US11/719,770 patent/US8535229B2/en not_active Expired - Fee Related
- 2005-07-15 CN CN200580039431A patent/CN100574707C/zh not_active Expired - Fee Related
- 2005-07-15 WO PCT/JP2005/013153 patent/WO2006057092A1/ja active Application Filing
- 2005-07-15 JP JP2006547646A patent/JP4643591B2/ja not_active Expired - Fee Related
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JP2003010181A (ja) * | 2001-04-25 | 2003-01-14 | Medison Co Ltd | 直交ゴレーコードを用いる超音波撮像方法及びその装置 |
JP2004113694A (ja) * | 2002-09-30 | 2004-04-15 | Fuji Photo Film Co Ltd | 超音波撮像装置及び超音波撮像方法 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009279306A (ja) * | 2008-05-26 | 2009-12-03 | Fujifilm Corp | 超音波診断装置 |
JP2010099466A (ja) * | 2008-09-29 | 2010-05-06 | Toshiba Corp | 超音波診断装置及び超音波送受信方法 |
WO2019176232A1 (ja) * | 2018-03-16 | 2019-09-19 | 株式会社日立製作所 | 超音波診断装置及び送信制御方法 |
JP2019154977A (ja) * | 2018-03-16 | 2019-09-19 | 株式会社日立製作所 | 超音波診断装置 |
JP7008549B2 (ja) | 2018-03-16 | 2022-01-25 | 富士フイルムヘルスケア株式会社 | 超音波診断装置 |
Also Published As
Publication number | Publication date |
---|---|
CN100574707C (zh) | 2009-12-30 |
EP1815795B1 (en) | 2012-11-21 |
JP4643591B2 (ja) | 2011-03-02 |
EP1815795A4 (en) | 2011-09-21 |
US8535229B2 (en) | 2013-09-17 |
US20080027318A1 (en) | 2008-01-31 |
JPWO2006057092A1 (ja) | 2008-06-05 |
CN101060812A (zh) | 2007-10-24 |
EP1815795A1 (en) | 2007-08-08 |
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