KR850000681A - 검사중인 물체의 슬라이스 영상화 방법 - Google Patents
검사중인 물체의 슬라이스 영상화 방법 Download PDFInfo
- Publication number
- KR850000681A KR850000681A KR1019840003574A KR840003574A KR850000681A KR 850000681 A KR850000681 A KR 850000681A KR 1019840003574 A KR1019840003574 A KR 1019840003574A KR 840003574 A KR840003574 A KR 840003574A KR 850000681 A KR850000681 A KR 850000681A
- Authority
- KR
- South Korea
- Prior art keywords
- projection
- measurement
- measurements
- slice
- scan
- Prior art date
Links
- 238000003384 imaging method Methods 0.000 title claims 4
- 238000007689 inspection Methods 0.000 title claims 2
- 238000000034 method Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims 15
- 230000002238 attenuated effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
-
- 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
- A61B8/15—Transmission-tomography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
- G01R33/56509—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to motion, displacement or flow, e.g. gradient moment nulling
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- High Energy & Nuclear Physics (AREA)
- Acoustics & Sound (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Signal Processing (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Computer Networks & Wireless Communication (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
내용 없음.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 선택 여기에 의해 한정되는 평면형 슬라이스를 가진 NMR샘플의 불변자계내에서의 도해도.
제3도는 NMR을 이용하는 배면 투사로부터 영상 재구성 방법을 보여주는 도면.
제5도는 본 발명의 방법을 초음파 부채꼴 비임(fan beam)을 활용한 다중각 투사식 재구성의 초음파 방법에 적용한 것을 보여준 도면.
Claims (12)
- 검사중인 물체내의 슬라이스를 영상화하기 위해 상기 슬라이스의 최소한 180° 주사에 대응하여 다수의 투사 측정을 하는 슬라이스 영상화 방법으로서, 상기 주사의 대향 각도의 극단에서의 한쌍의 투사는 그들사이에 불일치를 감소시키기 위해 시간에서 서로 가깝게 연속으로 얻어지고, 상기 다수의 투사 측정들중의 나머지들이 상기 대향 각도의 극단 사이에 있는 투사각들에 대해 진동방식으로 얻어지는 것을 특징으로한 슬라이스 영상화 방법.
- 제1항에 있어서, 상기 주사의 각도 극단에서의 상기 한쌍의 투사측정은 상기 주사의 임시의 처음측정을 포함하며, 상기 다수의 측정들의 나머지들은 주사각도에서의 중심을 향하는 진동성 측정 시퀀스로 얻어지는 것을 특징으로 한 슬라이드 영상화 방법.
- 제1항에 있어서, 투사측정들의 상기 쌍들은 상기 주사의 임시적인 마지막 측정을 포함하고, 상기 다수의 측정들의 나머지들은 두 각도 극단을 향해 상기 주사의 각도 중심부에서의 상기 측정과 함께 시작하는 진동성 측정 시퀀스로 얻어지는 것을 특징으로 한 슬라이스 영상화 방법.
- 제1항에 있어서, 상기 방법은 평행선 투사방법을 포함한 것을 특징으로 한 슬라이스 영상화 방법.
- 제4항에 있어서, 영상 슬라이스 내에서 각 투사측정 방향은 자계 그래디언트 방향에 의해 결정되는 것을 특징으로 한 슬라이스 영상화 방법.
- 상기 영상 슬라이스가 불변 균질 자계내에 위치되는 상기 제5항의 방법으로서, 핵스핀이 NMR신호를 발생하도록 상기 영상 슬라이스 내에 있는 다수의 핵스핀을 선택적으로 여기하는 단계와 , 그래디언트 방향에 수직인 아이스크로맷이 그것을 따라 상기 그래디언트 방향을 따르는 투사점들을 표시하는 그러한 상기자계 그래디언트의 적용하에서 NMR신호를 측정하는 단계를 포함한 것을 특징으로 한 슬라이스 영상화 방법.
- 제1항에 있어서, 부채꼴 비임 투사를 포함한 것을 특징으로 한 슬라이스 영상화 방법.
- 제7항에서, 상기 부채꼴비임은 초음파 에너지 비임을 포함하는 것을 특징으로 한 슬라이스 영상화 방법.
- 제8항에 있어서, 상기 투사측정들은 상기 영상 슬라이스내에서 상기 부채꼴 비임내에 있는 다수의 초음파 선 통로를 따라 분산되는 또는 흡수되지 않은 초음파 에너지의 세기를 측정하는 것을 포함한 것을 특징으로한 슬라이스 영상화 방법.
- 제8항에 있어서, 상기 투사 측정들은 상기 부채꼴 비임내의 다수의 선통로를 따르는 초음파 비임의 전파속도를 측정하는 것을 포함한 슬라이스 영상화 방법.
- 제8항에 있어서, 투사측정은 물체의 최소한 360 주사에 대응하여 이뤄지는 것을 특징으로 한 슬라이스 영상화 방법.
- 제8항에 있어서, 상기 투사측정 단계은 상기 물체를 초음파 에너지를 송수신할 수 있는 초음파 변환기들을 환형상의 배열로 위치시키고, 상기 변환기들 중의 하나에 의해 발생된 초음파 에너지의 동일 평면의 비임으로 상기 영상 슬라이스를 조사하고, 상기 부채꼴 비임에 의해 대향된 각도내에 다수의 변환기들에서 상기 슬라이스내에서 분산된 또는 감쇠되지 않은 초음파 에너지를 검출하는 단계를 포함한 슬라이스 영상화 방법.※ 참고사항:최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US509561 | 1983-06-30 | ||
| US06/509,561 US4581581A (en) | 1983-06-30 | 1983-06-30 | Method of projection reconstruction imaging with reduced sensitivity to motion-related artifacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850000681A true KR850000681A (ko) | 1985-02-28 |
| KR880001363B1 KR880001363B1 (ko) | 1988-07-28 |
Family
ID=24027156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019840003574A KR880001363B1 (ko) | 1983-06-30 | 1984-06-23 | 검사중인 물체의 슬라이스 영상화 방법 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4581581A (ko) |
| EP (1) | EP0130479B1 (ko) |
| JP (1) | JPS6047947A (ko) |
| KR (1) | KR880001363B1 (ko) |
| DE (1) | DE3481783D1 (ko) |
| FI (1) | FI841630A (ko) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8417290D0 (en) * | 1984-07-06 | 1984-08-08 | Picker Int Ltd | Nuclear magnetic resonance method |
| NL8501459A (nl) * | 1985-05-22 | 1986-12-16 | Philips Nv | Werkwijze voor het verminderen van artefacten bij het met behulp van fourier-zeugmatografie bepalen van beelden. |
| DE3676481D1 (de) * | 1985-08-09 | 1991-02-07 | Picker Int Inc | Zentral angeordnete phasenkodierung. |
| US4724386A (en) * | 1985-09-30 | 1988-02-09 | Picker International, Inc. | Centrally ordered phase encoding |
| US4728890A (en) * | 1985-08-16 | 1988-03-01 | Picker International, Inc. | Motion artifact suppression technique of magnetic resonance imaging |
| US4769603A (en) * | 1985-08-19 | 1988-09-06 | Siemens Aktiengesellschaft | Method for the operation of a nuclear magnetic resonance apparatus |
| US4721912A (en) * | 1985-09-30 | 1988-01-26 | The Reagents Of The University Of California | Apparatus and method for initially capturing most significant low spatial frequency NMR imaging data |
| JPS62103554A (ja) * | 1985-10-30 | 1987-05-14 | Yokogawa Medical Syst Ltd | Ｎｍｒイメ−ジング装置 |
| GB2190502B (en) * | 1986-05-16 | 1989-12-13 | Gen Electric Plc | Nuclear magnetic resonance methods and apparatus |
| US4868501A (en) * | 1988-06-10 | 1989-09-19 | Leland Stanford University | Method and means for magnetic resonance spin-echo imaging using an adiabatic three pi pulse sequence |
| EP0705564B1 (en) * | 1994-10-07 | 2004-02-04 | Advanced Technology Laboratories, Inc. | Ultrasonic diagnostic image scanning techniques |
| US6095976A (en) * | 1997-06-19 | 2000-08-01 | Medinol Ltd. | Method for enhancing an image derived from reflected ultrasound signals produced by an ultrasound transmitter and detector inserted in a bodily lumen |
| DE19939791A1 (de) * | 1999-08-21 | 2001-02-22 | Glaser Eckhard | Aktiver Strukturreader |
| US6795723B1 (en) * | 2000-05-22 | 2004-09-21 | Koninklijke Philips Electronics, N.V. | Interleaved phase encoding acquisition for MRI with controllable artifact suppression and flexible imaging parameter selection |
| US8120358B2 (en) | 2006-04-13 | 2012-02-21 | The Regents Of The University Of California | Magnetic resonance imaging with high spatial and temporal resolution |
| US8386013B2 (en) * | 2006-04-13 | 2013-02-26 | The Regents Of The University Of California | Magnetic resonance imaging (MRI) using ultra short echo times and spiral sampling in K-space |
| US7602184B2 (en) * | 2007-04-30 | 2009-10-13 | The Regents Of The University Of California | Magnetic resonance spectroscopic imaging with short echo times |
| US9354204B2 (en) * | 2011-10-14 | 2016-05-31 | General Electric Company | Ultrasonic tomography systems for nondestructive testing |
| US9404659B2 (en) | 2012-12-17 | 2016-08-02 | General Electric Company | Systems and methods for late lean injection premixing |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1050654A (en) * | 1974-04-25 | 1979-03-13 | Varian Associates | Reconstruction system and method for ultrasonic imaging |
| US4129783A (en) * | 1976-05-06 | 1978-12-12 | General Electric Company | High speed computerized tomography imaging system |
| IL51490A (en) * | 1976-05-06 | 1979-05-31 | Gen Electric | High speed tomography using multiple x-ray sources |
| GB2037996B (en) * | 1978-11-16 | 1983-07-20 | Emi Ltd | Imaging systems |
| JPS5599240A (en) * | 1979-01-22 | 1980-07-29 | Tokyo Shibaura Electric Co | Ct scanner |
| US4333053A (en) * | 1979-03-13 | 1982-06-01 | Emi Limited | Imaging systems |
| JPS55138444A (en) * | 1979-04-13 | 1980-10-29 | Yokogawa Electric Works Ltd | Phaseddarray sonar |
| JPS5676941A (en) * | 1979-11-28 | 1981-06-24 | Shimadzu Corp | Ultrasonic diagnosing device |
| JPS574541A (en) * | 1980-06-12 | 1982-01-11 | Toshiba Corp | Nuclear magnetic resonance apparatus |
| DE3127177A1 (de) * | 1981-07-09 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur korrektur von durch laufzeiteffekte und/oder fehler der ortsbestimmenden elemente einer abtastvorrichtung verursachten bildfehlern bei der ultraschall-abbildung von objekten, insbesondere bei der ultraschall-reflexions-computer-tomographie und dem compound-b-scan-verfahren |
| JPS5838539A (ja) * | 1981-08-31 | 1983-03-07 | 株式会社東芝 | 診断用核磁気共鳴装置 |
| US4594550A (en) * | 1982-09-07 | 1986-06-10 | Utsunomiya University | Method of scanning specifying magnetic field for nuclear magnetic resonance imaging |
| US4549140A (en) * | 1983-06-03 | 1985-10-22 | General Electric Company | Method utilizing combined, interleaved pulse sequences for reducing motion artifacts in computed T1,T2 and M0 NMR imaging |
-
1983
- 1983-06-30 US US06/509,561 patent/US4581581A/en not_active Expired - Fee Related
-
1984
- 1984-04-25 FI FI841630A patent/FI841630A/fi not_active Application Discontinuation
- 1984-06-20 EP EP84107078A patent/EP0130479B1/en not_active Expired
- 1984-06-20 DE DE8484107078T patent/DE3481783D1/de not_active Expired - Fee Related
- 1984-06-23 KR KR1019840003574A patent/KR880001363B1/ko not_active IP Right Cessation
- 1984-06-28 JP JP59132136A patent/JPS6047947A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6047947A (ja) | 1985-03-15 |
| KR880001363B1 (ko) | 1988-07-28 |
| EP0130479B1 (en) | 1990-03-28 |
| US4581581A (en) | 1986-04-08 |
| FI841630A (fi) | 1984-12-31 |
| DE3481783D1 (de) | 1990-05-03 |
| JPH0422574B2 (ko) | 1992-04-17 |
| FI841630A0 (fi) | 1984-04-25 |
| EP0130479A3 (en) | 1986-04-23 |
| EP0130479A2 (en) | 1985-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR850000681A (ko) | 검사중인 물체의 슬라이스 영상화 방법 | |
| US6359446B1 (en) | Apparatus and method for nondestructive testing of dielectric materials | |
| Breazeale et al. | 2. Ultrasonic Wave Velocity and Attenuation Measurements | |
| US3910124A (en) | Non-destructive testing procedures | |
| US4126047A (en) | Surface acoustic wave rate sensor and position indicator | |
| JPS58140338A (ja) | 光フアイバおよび母材の屈折率プロフイルを決定する方法および装置 | |
| PT920641E (pt) | Processo nao destrutivo de determinacao tridimensional de estruturas em construcoes | |
| EP0242807A2 (en) | Method of measurement of residual stresses in the material of the object under test | |
| GB2196121A (en) | Method and apparatus for visualizing ultrasonic waves in liquid-solid systems | |
| US3776026A (en) | Ultrasonic flaw determination by spectral anaylsis | |
| EP1017996B1 (en) | Nondestructive testing of dielectric materials | |
| US5229973A (en) | Method of selecting ultrasonic transducers for use in ultrasonic inspection apparatus | |
| US3532973A (en) | Microwave flaw detector | |
| Zhuravlev et al. | Non-destructive testing at microwaves using a vector network analyzer and a two-coordinate mechanical scanner | |
| RU2664933C1 (ru) | Способ определения макрорельефа поверхности и внутренних включений объекта и устройство для его реализации | |
| Lei et al. | The effect of ultrasound wave path estimation to defect characterization capability in half-skip total focusing method | |
| SU1408354A1 (ru) | Способ измерени коэффициента затухани упругих волн в материалах | |
| JP2740871B2 (ja) | 超音波試験における横波音速測定方法および装置 | |
| SU1158948A1 (ru) | Устройство дл регистрации фазовой структуры электромагнитного пол | |
| SU119025A1 (ru) | Способ определени частотных и фазовых характеристик приемников ультразвука | |
| SU537294A1 (ru) | Ультразвуковой способ контрол качества ледопородных и лед ных покрытий | |
| SU1252720A1 (ru) | Устройство дл определени анизотропных свойств поликристаллических материалов | |
| Cawley et al. | A comparison of the natural frequency changes produced by cracks and slots | |
| SU1167535A1 (ru) | Способ и устройство дл измерени диэлектрической проницаемости веществ | |
| Chaskelis | Transducers—fact and fiction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| G160 | Decision to publish patent application | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 19920529 Year of fee payment: 5 |
|
| LAPS | Lapse due to unpaid annual fee |