WO2005115250A1 - 超音波診断装置 - Google Patents
超音波診断装置 Download PDFInfo
- Publication number
- WO2005115250A1 WO2005115250A1 PCT/JP2005/008278 JP2005008278W WO2005115250A1 WO 2005115250 A1 WO2005115250 A1 WO 2005115250A1 JP 2005008278 W JP2005008278 W JP 2005008278W WO 2005115250 A1 WO2005115250 A1 WO 2005115250A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reception
- deflection angle
- transmission beam
- parallel
- transmission
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
- A61B8/14—Echo-tomography
-
- 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
- G01S15/8909—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration
- G01S15/8915—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array
- G01S15/8927—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array using simultaneously or sequentially two or more subarrays or subapertures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
-
- 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
- G01S15/8909—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration
- G01S15/8915—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array
- G01S15/8925—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays
-
- 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 diagnostic apparatus that has an arrayed transducer and scans a subject.
- a conventional ultrasonic diagnostic apparatus includes a two-dimensional array 102 in which transducers 101 are arranged as shown in FIG. 8, column-wise delay addition circuits 103 to 106, and row-direction delay addition circuits 107 and 108. Be composed.
- Column direction delay addition circuits 103 to 106 perform delay addition of signals detected by the transducers 101 in the column direction of the two-dimensional array 102.
- the row-direction delay addition circuits 107 and 108 delay-add the signal groups delayed and added by the column-direction delay addition circuits 103 to 106. Thereby, parallel reception in the row direction and the column direction is realized with a small circuit scale (see Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-254120 (Page 3, FIG. 1)
- the conventional ultrasonic diagnostic apparatus has a problem that the relative sensitivity of parallel reception becomes non-uniform due to the deflection angle of the transmission beam.
- An object of the present invention is to provide an ultrasonic diagnostic apparatus capable of maintaining uniform relative sensitivity of parallel reception regardless of a deflection angle of an ultrasonic transmission beam in order to solve a conventional problem. It is.
- An ultrasonic diagnostic apparatus of the present invention includes an arrayed vibrator in which a plurality of vibrators for transmitting an ultrasonic wave to a subject and receiving a reflected wave thereof are arranged, and a reception signal obtained by the arrayed vibrator is provided.
- an ultrasonic wave including a delay addition unit that performs parallel reception by performing delay addition, and a deflection angle control unit that controls a deflection angle of reception based on the delay addition setting performed by the delay addition unit.
- the deflection angle control unit may control a plurality of directional directions of a plurality of receptions in parallel reception as a deflection angle of a transmission beam transmitted from the arrayed transducer increases. The angle between them is narrowed.
- a configuration includes a correction unit that performs control to change the sensitivity correction amount for a plurality of reception signals in parallel reception so as to compensate for a decrease in relative sensitivity of transmission and reception due to an increase in the deflection angle of the transmission beam. May be.
- the correction unit corrects the plurality of received signals having the same angle between the directional direction of the transmission beam and the directional direction of the parallel reception to make the relative sensitivity equal. Rub it.
- the deflection angle control unit may be configured to reduce the difference between the deflection angles of adjacent transmission beams as the deflection angle of the transmission beam increases.
- the plurality of transducers may be arranged at least two-dimensionally, and a point at which each of the plurality of transmission beams intersects the projection plane may form a two-dimensional grid point at equal intervals.
- an ultrasonic diagnostic apparatus that keeps the relative sensitivity of parallel reception uniform regardless of the deflection angle of the ultrasonic transmission beam.
- FIG. 1 is a block diagram showing a configuration of a reception front end of the ultrasonic diagnostic apparatus according to the first embodiment.
- FIG. 2 is a diagram showing a configuration of a sub-array according to the first embodiment.
- FIG. 3 is a diagram showing the azimuth angle dependence of the relative sensitivity of parallel reception in the first embodiment.
- FIG. 4A is a diagram showing a relative sensitivity of reception when the deflection angle of the transmission beam is 0 ° in the first embodiment.
- FIG. 4B is a diagram showing the relative sensitivity of reception when the deflection angle of the transmission beam is 30 ° in the first embodiment.
- FIG. 5A is a diagram showing angles formed by directivity directions of parallel reception according to the first embodiment.
- FIG. 5B is a diagram showing a difference in the deflection angle of the transmission beam in the first embodiment.
- FIG. 6A is a side view showing an ultrasonic beam transmitted by an arrayed oscillator in the second embodiment.
- FIG. 6B is a top view showing an ultrasonic beam according to the second embodiment.
- FIG. 7 is a diagram showing the center of the light receiving sensitivity of the transmission beam and parallel reception of the ultrasonic diagnostic apparatus according to the third embodiment.
- FIG. 8 is a block diagram showing a configuration of a reception front end of a conventional ultrasonic diagnostic apparatus.
- FIG. 1 shows a block diagram of a main part of a reception front end of the ultrasonic diagnostic apparatus according to the first embodiment.
- the array transducer 1 is configured by arranging a plurality of sub-arrays (SA) 2 in a first direction and a second direction.
- SA sub-arrays
- IP in-group processor
- the output of the intra-group processor (IP) 3 is supplied to first direction delay addition circuits 4 to 7 (first direction delay addition units).
- the plurality of parallel reception outputs of the first direction delay addition circuit 4 are supplied to second direction delay addition circuits 8 and 9 (second direction delay addition section).
- a plurality of outputs of the first direction delay addition circuits 5 to 7 are supplied to the second direction delay addition circuits 8 and 9.
- the deflection angle control circuit 14 (deflection angle control unit) has software for correcting the deflection angle of parallel reception.
- the deflection angle control circuit 14 includes first direction delay addition circuits 4 to 7 and second direction delay addition circuits 8 and 9. Determine the delay addition value to be delayed added.
- the plurality of parallel reception outputs S (l, 1) and S (l, 2) of the second direction delay addition circuit 8 are supplied to the correction circuits 10 and 11.
- the plurality of parallel reception outputs S (2, 1) and S (2, 2) of the second direction delay addition circuit 9 are supplied to a correction circuit 12 and a correction circuit 13.
- the correction circuits 10 to 13 (correction units) perform sensitivity correction on the parallel reception output based on the supplied parallel reception sensitivity correction signal.
- the outputs of the correction circuits 10 to 13 are two-dimensional delay addition outputs.
- FIG. 2 is a diagram showing a configuration of the sub-array (SA) 2.
- the sub-array (SA) 2 includes a transmitting oscillator (X) and a receiving oscillator (R), and the respective oscillators are arranged in a row direction and a column direction.
- the row direction matches the first direction
- the column direction matches the second direction.
- FIG. 3 is a diagram showing an example of the azimuth-angle dependence on the relative sensitivity of parallel reception.
- Curves 21, 22, and 23 in FIG. 3 show the relative sensitivities of transmission and reception for different transmission directivity directions with respect to the transmission beam.
- Curve 21 shows the case where the transmitting and receiving directions match.
- Curve 22 shows that the transmit and receive directions are shifted by 1 ° due to parallel reception. If the transmit and receive directions are shifted by 0.5 °, curve 23 shows that the receive direction is shifted by 2 ° due to parallel reception. The direction of transmission and reception is shifted by 1 °.
- the curved lines 22 and 23 show the case where the transmission and reception directions do not match. Also send When the difference between the directional directions of reception and reception increases, the relative sensitivity decreases.
- FIG. 4A is a diagram illustrating an example of the relative sensitivity when the transmission beam deflection angle is 0 °
- FIG. 4B is a diagram illustrating an example of the relative sensitivity when the transmission beam deflection angle is 30 °
- FIG. 5A is a diagram showing the angle between the directivity directions of the parallel reception
- FIG. 5B is a diagram showing the difference in the deflection angle of the transmission beam.
- T (m) indicates the directivity of the transmission beam when it is not deflected
- LI (m) to L4 (m) indicate the directivity of parallel reception corresponding to the directivity T (m) of the transmission beam
- T (n) is the directivity of the transmission beam when it is deflected
- LI (n) to L4 (n) are the directivity of parallel reception corresponding to T (n).
- a transmission ultrasonic pulse is transmitted from the transmitting transducer (X) of the sub-array (SA) 2 to a region of interest.
- the received signal from the receiving transducer (R) of the sub-array (SA) 2 is phased by the intra-loop processor (IP) 3.
- the outputs of the in-group processors (IP) 3 corresponding to the sub-arrays (SA) 2 arranged in the first direction are collectively input to the first-direction delay calorimetric circuits 4 to 7.
- the first direction delay addition circuits 4 to 7 output parallel reception signals pointing in the direction of the region of interest and having a plurality of pointing directions with respect to the first direction.
- the second direction delay addition circuits 8 and 9 generate a reception delay time so as to change the directivity direction at every minute angle with respect to the second direction, and the parallel reception signals output by the first direction delay addition circuits 4 to 7 are generated. The delay time is corrected, and a parallel reception signal is output.
- Correction circuits 10 to 13 correct the signal strengths of the parallel reception signal outputs output from the second direction delay addition circuits 8 and 9. As shown in FIG. 3, the relative sensitivity of transmission and reception in parallel reception greatly changes due to the difference between the direction of the transmission beam and the direction of reception. Therefore, when changing the difference between the directional directions of transmission and reception according to the deflection angle of transmission, it is necessary to correct the change in relative sensitivity in the correction circuits 10 to 13.
- the deflection angle in the transmission directivity direction when the deflection angle in the transmission directivity direction is 0 °, the difference between the relative sensitivity peak and the side lobe, that is, the dynamic range is about 70 dB.
- the dynamic range of the relative sensitivity is It is about 66dB.
- angle ⁇ indicates an angle formed by a plurality of directivity directions L1 to L4 of parallel reception corresponding to transmit beam directivity direction T.
- the angle ⁇ (m) corresponding to the transmission beam direction T (m) when the deflection angle is 0 ° is the angle ⁇ (n) corresponding to the transmission beam direction T (n) when deflected. Greater than.
- the angle ⁇ (m) formed by the transmission beam directivity direction T (m) and T (m + 1) is large when the transmission deflection angle is large.
- the angle is set to be larger than the angle ⁇ (n) formed by the directivity direction T (n) of the transmission beam and T (n + 1).
- the deflection angle control circuit 14 changes the direction of a plurality of receptions in parallel reception as the transmission deflection angle increases.
- the angle can be controlled to be narrow. Then, the difference between the relative sensitivities of transmission and reception due to different angles formed by the directional directions of reception in parallel reception is corrected by the correction circuits 10 to 13, and an image having a uniform relative sensitivity is obtained.
- FIG. 6A and 6B show the intervals between the transmission beams of the ultrasonic diagnostic apparatus according to the second embodiment. Show.
- portions having the same configurations and functions as those in FIG. 5B referred to in the first embodiment are denoted by the same reference numerals or symbols, and description thereof is omitted.
- Other components not shown in FIG. 6 are the same as those in FIG.
- FIG. 6A shows a side view of the arrayed vibrator 1, where the projection plane is arranged substantially parallel to the arrayed vibrator 1, and grid points P where the transmission beam and the projection plane intersect are indicated by circles.
- FIG. 6B is a view of FIG. 6A as viewed from above.
- the projection plane may be a plane perpendicular to the beam at the center of scanning.
- grid points p are two-dimensionally arranged at intervals of ⁇ in the first direction and Ay in the second direction.
- the angle ⁇ ⁇ (k) formed by the transmit beam directivity direction T (k) and T (k + 1) when the transmit deflection angle is small is the transmit beam directivity when the transmit beam deflection angle is large. It is set to be larger than the angle ⁇ ⁇ (j) formed by the directions T (j) and T (j + 1). Further, the angle formed by the parallel reception directivity directions corresponding to T (k) is made larger than the angle formed by the parallel reception directivity directions corresponding to T (j).
- the grid point P which is the intersection between the transmission beam and the projection plane, is represented by ⁇ in the first direction, Ay in the second direction, and so on. Two-dimensionally arranged at intervals. Therefore, as the deflection angle of the transmission beam increases, the angle between the directivity directions of parallel reception decreases, and a good image with uniform relative sensitivity can be obtained.
- FIG. 7 shows the center of the transmission beam and the center of the reception sensitivity of the parallel reception of the ultrasonic diagnostic apparatus according to the third embodiment.
- parts having the same configurations and functions as those in FIG. 1 referred to in the first embodiment are given the same reference numerals or symbols, and description thereof is omitted.
- Other components not shown in FIG. 7 are the same as those in FIG.
- a mark indicates the center of the transmission beam, and a mark indicates the center of the reception sensitivity of the parallel reception.
- the sign S (x, y) (1 ⁇ x ⁇ 4, 1 ⁇ 4) of the parallel reception signal corresponding to the center of the reception sensitivity of the parallel reception is added.
- the parallel received signals are classified into three groups.
- the first group is composed of S (1, 1), S (l, 4), S (4, 1), and S (4, 4), and each signal is transmitted from the center of the transmission beam.
- the received signals are at equal distances and are received in a state in which the angle between the directional direction of the transmission beam and the directional direction by parallel reception is equal. Therefore, the correction is performed using the parallel reception sensitivity correction signal in the correction circuits 10 to 13.
- the second group is composed of S (2, 2), S (2, 3), S (3, 2), S (3, 3), and each signal is This is a received signal that is located at an equal distance from the center of the transmission beam and that has the same angle between the direction of the transmission beam and the direction of parallel reception. Therefore, correction is performed in the correction circuits 10 to 13 using the same parallel reception sensitivity correction signal.
- the third group is S (1, 2), S (1, 3), S (2, 1), S (2, 4), S (3, 1), S (3, 4), S (4, 2) and S (4, 3), each signal is at the same distance from the center of the transmitting beam, and the angle between the direction of the transmitting beam and the direction of the parallel receiving is equal. This is the received signal received. Therefore, the correction is performed using the parallel reception sensitivity correction signal in the correction circuits 10 to 13.
- the 16 parallel reception signals S (x, y) are divided into three groups.
- the sensitivity can be corrected using three types of parallel reception sensitivity correction signals, and thus control becomes easy.
- the ultrasonic diagnostic apparatus of the present invention has an effect that an image having a uniform relative sensitivity can be obtained, and is useful as an ultrasonic diagnostic apparatus including an arrayed transducer for scanning a subject.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05737152A EP1749478A4 (en) | 2004-05-25 | 2005-05-02 | ULTRASOUND DIAGNOSTIC TOOL |
JP2006515329A JP4241825B2 (ja) | 2004-05-25 | 2005-05-02 | 超音波診断装置 |
US10/578,159 US20090048517A1 (en) | 2004-05-25 | 2005-05-02 | Ultrasonic diagnostic apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004155078 | 2004-05-25 | ||
JP2004-155078 | 2004-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005115250A1 true WO2005115250A1 (ja) | 2005-12-08 |
Family
ID=35450621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/008278 WO2005115250A1 (ja) | 2004-05-25 | 2005-05-02 | 超音波診断装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090048517A1 (ja) |
EP (1) | EP1749478A4 (ja) |
JP (1) | JP4241825B2 (ja) |
KR (1) | KR100754097B1 (ja) |
CN (1) | CN100455268C (ja) |
WO (1) | WO2005115250A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009535097A (ja) * | 2006-04-26 | 2009-10-01 | シーメンス メディカル ソリューションズ ユーエスエー インコーポレイテッド | 統合ビーム化が行われる方法および変換器アレイ |
JP2010005138A (ja) * | 2008-06-26 | 2010-01-14 | Toshiba Corp | 超音波診断装置 |
US9967660B2 (en) | 2015-08-28 | 2018-05-08 | Canon Kabushiki Kaisha | Signal processing apparatus and method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180271492A1 (en) * | 2014-11-07 | 2018-09-27 | Samsung Electronics Co., Ltd. | Ultrasonic apparatus and beamforming method for the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02206445A (ja) * | 1989-02-03 | 1990-08-16 | Toshiba Corp | 超音波診断装置 |
JPH10328185A (ja) * | 1997-06-04 | 1998-12-15 | Aloka Co Ltd | 超音波診断装置および診断用超音波送受信方法 |
JP2004033617A (ja) * | 2002-07-05 | 2004-02-05 | Matsushita Electric Ind Co Ltd | 超音波診断装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53114282A (en) * | 1977-03-16 | 1978-10-05 | Tokyo Shibaura Electric Co | Ultrasonic diagnosing device |
JPH078492A (ja) * | 1993-06-28 | 1995-01-13 | Toshiba Corp | 超音波診断装置 |
JP3094742B2 (ja) * | 1993-09-03 | 2000-10-03 | 松下電器産業株式会社 | 超音波診断装置 |
JP3763924B2 (ja) * | 1997-03-17 | 2006-04-05 | フクダ電子株式会社 | 超音波診断装置 |
JP4260920B2 (ja) * | 1998-05-13 | 2009-04-30 | 株式会社東芝 | 超音波診断装置 |
JP3847976B2 (ja) * | 1998-10-14 | 2006-11-22 | 株式会社東芝 | 超音波診断装置 |
JP2000254120A (ja) * | 1999-03-11 | 2000-09-19 | Toshiba Corp | 3次元超音波診断装置 |
JP2001327505A (ja) * | 2000-05-22 | 2001-11-27 | Toshiba Corp | 超音波診断装置 |
-
2005
- 2005-05-02 CN CNB2005800018165A patent/CN100455268C/zh not_active Expired - Fee Related
- 2005-05-02 KR KR1020067011630A patent/KR100754097B1/ko not_active IP Right Cessation
- 2005-05-02 US US10/578,159 patent/US20090048517A1/en not_active Abandoned
- 2005-05-02 WO PCT/JP2005/008278 patent/WO2005115250A1/ja not_active Application Discontinuation
- 2005-05-02 EP EP05737152A patent/EP1749478A4/en not_active Withdrawn
- 2005-05-02 JP JP2006515329A patent/JP4241825B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02206445A (ja) * | 1989-02-03 | 1990-08-16 | Toshiba Corp | 超音波診断装置 |
JPH10328185A (ja) * | 1997-06-04 | 1998-12-15 | Aloka Co Ltd | 超音波診断装置および診断用超音波送受信方法 |
JP2004033617A (ja) * | 2002-07-05 | 2004-02-05 | Matsushita Electric Ind Co Ltd | 超音波診断装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1749478A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8465431B2 (en) | 2005-12-07 | 2013-06-18 | Siemens Medical Solutions Usa, Inc. | Multi-dimensional CMUT array with integrated beamformation |
JP2009535097A (ja) * | 2006-04-26 | 2009-10-01 | シーメンス メディカル ソリューションズ ユーエスエー インコーポレイテッド | 統合ビーム化が行われる方法および変換器アレイ |
JP2010005138A (ja) * | 2008-06-26 | 2010-01-14 | Toshiba Corp | 超音波診断装置 |
US8888705B2 (en) | 2008-06-26 | 2014-11-18 | Kabushiki Kaisha Toshiba | Ultrasound diagnosis apparatus |
US9967660B2 (en) | 2015-08-28 | 2018-05-08 | Canon Kabushiki Kaisha | Signal processing apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
EP1749478A1 (en) | 2007-02-07 |
CN100455268C (zh) | 2009-01-28 |
JPWO2005115250A1 (ja) | 2008-03-27 |
JP4241825B2 (ja) | 2009-03-18 |
CN1905839A (zh) | 2007-01-31 |
EP1749478A4 (en) | 2008-12-24 |
KR20070005926A (ko) | 2007-01-10 |
US20090048517A1 (en) | 2009-02-19 |
KR100754097B1 (ko) | 2007-08-31 |
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