IL98928A - Stable filter that can be stopped for two-corneal computed tomography - Google Patents
Stable filter that can be stopped for two-corneal computed tomographyInfo
- Publication number
- IL98928A IL98928A IL9892891A IL9892891A IL98928A IL 98928 A IL98928 A IL 98928A IL 9892891 A IL9892891 A IL 9892891A IL 9892891 A IL9892891 A IL 9892891A IL 98928 A IL98928 A IL 98928A
- Authority
- IL
- Israel
- Prior art keywords
- filter
- output
- period
- during
- data acquisition
- Prior art date
Links
- 230000009977 dual effect Effects 0.000 title claims description 11
- 238000002591 computed tomography Methods 0.000 title description 16
- 238000005070 sampling Methods 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 18
- 238000013170 computed tomography imaging Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000007787 solid Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004846 x-ray emission Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/405—Source units specially adapted to modify characteristics of the beam during the data acquisition process
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/482—Diagnostic techniques involving multiple energy imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4021—Arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Image Processing (AREA)
- Image Analysis (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/562,766 US5218533A (en) | 1990-08-06 | 1990-08-06 | Stable interruptible filter for dual beam computed tomography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL98928A0 IL98928A0 (en) | 1992-07-15 |
| IL98928A true IL98928A (en) | 1994-06-24 |
Family
ID=24247683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL9892891A IL98928A (en) | 1990-08-06 | 1991-07-23 | Stable filter that can be stopped for two-corneal computed tomography |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5218533A (fr) |
| EP (1) | EP0473296B1 (fr) |
| JP (1) | JPH0790023B2 (fr) |
| CN (1) | CN1056506C (fr) |
| CA (1) | CA2042226A1 (fr) |
| DE (1) | DE69125668T2 (fr) |
| IL (1) | IL98928A (fr) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301108A (en) * | 1993-02-01 | 1994-04-05 | General Electric Company | Computed tomography system with z-axis correction |
| WO1996042022A1 (fr) * | 1993-03-31 | 1996-12-27 | Eg & G Astrophysics Research Corporation | Reconstitution tridimensionnelle fondee sur un nombre limite de projections radiographiques |
| US5841829A (en) * | 1997-05-13 | 1998-11-24 | Analogic Corporation | Optimal channel filter for CT system with wobbling focal spot |
| JP4550179B2 (ja) * | 1999-02-12 | 2010-09-22 | 株式会社東芝 | Ｘ線コンピュータ断層撮影装置 |
| US6597352B1 (en) * | 1999-05-05 | 2003-07-22 | Nokia Corporation | Method and device for filtered sync detection |
| CN100536774C (zh) * | 2002-07-23 | 2009-09-09 | Ge医药系统环球科技公司 | 检测斑块成分的方法和系统 |
| US6999549B2 (en) * | 2002-11-27 | 2006-02-14 | Ge Medical Systems Global Technology, Llc | Method and apparatus for quantifying tissue fat content |
| US7187748B2 (en) * | 2003-12-30 | 2007-03-06 | Ge Medical Systems Global Technology Company, Llc | Multidetector CT imaging method and apparatus with reducing radiation scattering |
| US7453987B1 (en) * | 2004-03-04 | 2008-11-18 | Science Applications International Corporation | Method and system for high energy, low radiation power X-ray imaging of the contents of a target |
| WO2006047718A2 (fr) * | 2004-10-22 | 2006-05-04 | Scantech Holdings, Llc | Systeme de detection de faisceau angulaire pour l'inspection de conteneurs |
| JP4294610B2 (ja) * | 2005-04-14 | 2009-07-15 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | 放射線ｃｔ装置、データ収集装置及びデータ収集方法 |
| JP4299806B2 (ja) * | 2005-05-11 | 2009-07-22 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | Ｘ線ｃｔ装置 |
| WO2007049168A2 (fr) * | 2005-10-28 | 2007-05-03 | Koninklijke Philips Electronics, N.V. | Procede et appareil de tomographie spectrale par ordinateur |
| US7283609B2 (en) * | 2005-11-10 | 2007-10-16 | General Electric Company | CT detector photodiode having multiple charge storage devices |
| WO2007143531A2 (fr) * | 2006-06-02 | 2007-12-13 | Massachusetts Eye & Ear Infirmary | Oculométrie dans la bande audible pOur l'évaluation de la fonction vestibulaire |
| JP2010512826A (ja) * | 2006-12-15 | 2010-04-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | スペクトル分解ｘ線撮像装置 |
| FR2947658B1 (fr) * | 2009-07-03 | 2011-07-29 | Norbert Beyrard | Procede et dispositif d'imagerie a rayons x a traitement tridimentionnel |
| US8314394B1 (en) | 2009-11-04 | 2012-11-20 | Science Applications International Corporation | System and method for three-dimensional imaging using scattering from annihilation coincidence photons |
| DE102011075577B4 (de) * | 2011-05-10 | 2013-01-31 | MULTIPOND Wägetechnik GmbH | Signalverarbeitungsverfahren, Vorrichtung zur Signalverarbeitung und Waage mit Vorrichtung zur Signalverarbeitung |
| CN111096761B (zh) * | 2018-10-29 | 2024-03-08 | 上海西门子医疗器械有限公司 | 修正楔形滤波器散射的方法、装置和相关设备 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2503789C3 (de) * | 1975-01-30 | 1980-10-09 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Einrichtung zum Ermitteln der Absorption einer Strahlung in einer Ebene eines Körpers, mit einer Anordnung einer Strahlenquelle und einer Vielzahl von Strahlendetektoren, die relativ zu dem Körper kontinuierlich gedreht wird |
| US4029963A (en) * | 1976-07-30 | 1977-06-14 | The Board Of Trustees Of Leland Stanford Junior University | X-ray spectral decomposition imaging system |
| US4331877A (en) * | 1980-03-21 | 1982-05-25 | University Patents, Inc. | Transverse tomography with optical filtering |
| US4393352A (en) * | 1980-09-18 | 1983-07-12 | The Perkin-Elmer Corporation | Sample-and-hold hybrid active RC filter |
| US4547893A (en) * | 1981-06-12 | 1985-10-15 | Analogic Corporation | Continuous wave fan beam tomography system having a best-estimating filter |
| US4583240A (en) * | 1983-08-15 | 1986-04-15 | General Electric Company | Data acquisition circuitry for use in computerized tomography system |
| US5115394A (en) * | 1983-11-25 | 1992-05-19 | Technicare Corporation | Dual energy computerized tomography system |
| US4620313A (en) * | 1984-06-20 | 1986-10-28 | Technicare Corporation | Controlled cutoff frequency analog filter for CT scanners |
| US4815118A (en) * | 1987-06-29 | 1989-03-21 | General Electric Company | Data converter for CT data acquisition system |
-
1990
- 1990-08-06 US US07/562,766 patent/US5218533A/en not_active Expired - Fee Related
-
1991
- 1991-05-09 CA CA002042226A patent/CA2042226A1/fr not_active Abandoned
- 1991-07-23 IL IL9892891A patent/IL98928A/en not_active IP Right Cessation
- 1991-07-29 JP JP3210504A patent/JPH0790023B2/ja not_active Expired - Lifetime
- 1991-08-01 DE DE69125668T patent/DE69125668T2/de not_active Expired - Fee Related
- 1991-08-01 EP EP91307057A patent/EP0473296B1/fr not_active Expired - Lifetime
- 1991-08-03 CN CN91105322A patent/CN1056506C/zh not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0473296A2 (fr) | 1992-03-04 |
| EP0473296B1 (fr) | 1997-04-16 |
| JPH04244138A (ja) | 1992-09-01 |
| JPH0790023B2 (ja) | 1995-10-04 |
| IL98928A0 (en) | 1992-07-15 |
| DE69125668T2 (de) | 1997-11-06 |
| CA2042226A1 (fr) | 1992-02-07 |
| EP0473296A3 (en) | 1992-10-28 |
| DE69125668D1 (de) | 1997-05-22 |
| CN1058710A (zh) | 1992-02-19 |
| CN1056506C (zh) | 2000-09-20 |
| US5218533A (en) | 1993-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| KB | Patent renewed | ||
| KB | Patent renewed | ||
| MM9K | Patent not in force due to non-payment of renewal fees |