NL8601004A - Computertomografie-inrichting met gekombineerd recursief- en convolutiefilter. - Google Patents
Computertomografie-inrichting met gekombineerd recursief- en convolutiefilter. Download PDFInfo
- Publication number
- NL8601004A NL8601004A NL8601004A NL8601004A NL8601004A NL 8601004 A NL8601004 A NL 8601004A NL 8601004 A NL8601004 A NL 8601004A NL 8601004 A NL8601004 A NL 8601004A NL 8601004 A NL8601004 A NL 8601004A
- Authority
- NL
- Netherlands
- Prior art keywords
- convolution
- adder
- input
- factors
- output
- Prior art date
Links
- 238000002591 computed tomography Methods 0.000 title claims description 17
- 238000005259 measurement Methods 0.000 claims description 47
- 230000015654 memory Effects 0.000 claims description 39
- 238000013016 damping Methods 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 13
- 230000002238 attenuated effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 description 22
- 238000011045 prefiltration Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 14
- 238000001914 filtration Methods 0.000 description 13
- 102000003712 Complement factor B Human genes 0.000 description 6
- 108090000056 Complement factor B Proteins 0.000 description 6
- 238000007781 pre-processing Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- PHEDXBVPIONUQT-RGYGYFBISA-N phorbol 13-acetate 12-myristate Chemical compound C([C@]1(O)C(=O)C(C)=C[C@H]1[C@@]1(O)[C@H](C)[C@H]2OC(=O)CCCCCCCCCCCCC)C(CO)=C[C@H]1[C@H]1[C@]2(OC(C)=O)C1(C)C PHEDXBVPIONUQT-RGYGYFBISA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/003—Reconstruction from projections, e.g. tomography
- G06T11/005—Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S378/00—X-ray or gamma ray systems or devices
- Y10S378/901—Computer tomography program or processor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8601004A NL8601004A (nl) | 1986-04-21 | 1986-04-21 | Computertomografie-inrichting met gekombineerd recursief- en convolutiefilter. |
| US06/884,453 US4761738A (en) | 1986-04-21 | 1986-07-11 | Computer tomography apparatus including a combined recursive and convolution filter |
| DE8787200656T DE3767011D1 (de) | 1986-04-21 | 1987-04-07 | Ein kombiniertes rekursiv- und konvolutionsfilter enthaltende computertomographie-vorrichtung. |
| EP87200656A EP0242909B1 (de) | 1986-04-21 | 1987-04-07 | Ein kombiniertes Rekursiv- und Konvolutionsfilter enthaltende Computertomographie-Vorrichtung |
| CA000534941A CA1272813A (en) | 1986-04-21 | 1987-04-16 | Computer tomography apparatus including a combined recursive and convolution filter |
| IL82239A IL82239A0 (en) | 1986-04-21 | 1987-04-17 | Computer tomography apparatus |
| JP62096353A JPS62254736A (ja) | 1986-04-21 | 1987-04-21 | コンピユ−タ断層撮影装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8601004 | 1986-04-21 | ||
| NL8601004A NL8601004A (nl) | 1986-04-21 | 1986-04-21 | Computertomografie-inrichting met gekombineerd recursief- en convolutiefilter. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8601004A true NL8601004A (nl) | 1987-11-16 |
Family
ID=19847905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8601004A NL8601004A (nl) | 1986-04-21 | 1986-04-21 | Computertomografie-inrichting met gekombineerd recursief- en convolutiefilter. |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4761738A (de) |
| EP (1) | EP0242909B1 (de) |
| JP (1) | JPS62254736A (de) |
| CA (1) | CA1272813A (de) |
| DE (1) | DE3767011D1 (de) |
| IL (1) | IL82239A0 (de) |
| NL (1) | NL8601004A (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4897788A (en) * | 1988-04-18 | 1990-01-30 | General Electric Company | Image correction for computed tomography to remove crosstalk artifacts |
| US5276614A (en) * | 1989-11-17 | 1994-01-04 | Picker International, Inc. | Dynamic bandwidth reconstruction |
| US5020006A (en) * | 1989-05-03 | 1991-05-28 | Hewlett-Packard Company | Method for finding a reference point |
| US5043890A (en) * | 1989-06-12 | 1991-08-27 | General Electric | Compensation of computed tomography data for objects positioned outside the field of view of the reconstructed image |
| US5517544A (en) * | 1991-02-20 | 1996-05-14 | Elscint Ltd. | Afterglow artifact reduction |
| DE19802850A1 (de) * | 1998-01-26 | 1999-07-29 | Siemens Ag | Bildrekonstruktionsverfahren für die 3D-Rekonstruktion |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1471531A (en) * | 1973-04-25 | 1977-04-27 | Emi Ltd | Radiography |
| JPS5459856A (en) * | 1977-10-21 | 1979-05-14 | Hitachi Medical Corp | Xxray sectional image reproducer |
| NL8204086A (nl) * | 1982-10-22 | 1984-05-16 | Philips Nv | Werkwijze en inrichting voor het bepalen van een stralingsverzwakkingsverdeling in een vlak van een lichaam. |
-
1986
- 1986-04-21 NL NL8601004A patent/NL8601004A/nl not_active Application Discontinuation
- 1986-07-11 US US06/884,453 patent/US4761738A/en not_active Expired - Fee Related
-
1987
- 1987-04-07 EP EP87200656A patent/EP0242909B1/de not_active Expired
- 1987-04-07 DE DE8787200656T patent/DE3767011D1/de not_active Expired - Lifetime
- 1987-04-16 CA CA000534941A patent/CA1272813A/en not_active Expired
- 1987-04-17 IL IL82239A patent/IL82239A0/xx unknown
- 1987-04-21 JP JP62096353A patent/JPS62254736A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE3767011D1 (de) | 1991-02-07 |
| JPS62254736A (ja) | 1987-11-06 |
| IL82239A0 (en) | 1987-10-30 |
| CA1272813A (en) | 1990-08-14 |
| EP0242909B1 (de) | 1990-12-27 |
| EP0242909A1 (de) | 1987-10-28 |
| US4761738A (en) | 1988-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A1B | A search report has been drawn up | ||
| BV | The patent application has lapsed |