WO2005057279A1 - Method and apparatus for performing single-point projection imaging - Google Patents
Method and apparatus for performing single-point projection imaging Download PDFInfo
- Publication number
- WO2005057279A1 WO2005057279A1 PCT/FI2004/050169 FI2004050169W WO2005057279A1 WO 2005057279 A1 WO2005057279 A1 WO 2005057279A1 FI 2004050169 W FI2004050169 W FI 2004050169W WO 2005057279 A1 WO2005057279 A1 WO 2005057279A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ray source
- line scan
- scan camera
- imaging
- rotation axis
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
- G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4021—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
Definitions
- the present invention relates to a method for performing single-point projection imaging by using an X-ray apparatus, comprising an X-ray source and a line scan camera present at a set distance therefrom and provided with a digital detector, the X-ray source as well as the line scan camera being adapted to rotate around an object to be placed between the X-ray source and the line scan camera.
- the inventive method comprises performing the alignment of the focal spot of an X-ray source at a desired position and then imaging an object by scanning it with a beam emanating from the X-ray source, which is received by the detector of a line scan camera, in which method the scanning motion is effected in such a way that the focal spot remains essentially stationary during the imaging process.
- the inventive apparatus for implementing single-point projection imaging comprises an X-ray source and a line scan camera present at a set distance therefrom, the X-ray source as well as the line scan camera being adapted to rotate around an object to be placed therebetween, means for aligning the X-ray source's focal spot at a desired position, and means for effecting a scanning motion necessary for imaging the object in such a way that the focal spot remains essentially stationary during the imaging process.
- the alignment of the X-ray source's focal spot at a desired position is effected, e.g. by placing the object to be exposed between the X-ray source and the line scan camera by means of appropriate guides and supports at a set distance from the X-ray source's focal spot.
- the apparatus comprises preferably a frame element, on which is mounted pivotably about a rotation axis an element housing an X-ray source and a line scan camera, said rotation axis being adapted for displacement relative to the frame element during a scanning motion, such that the centre of rotation is essentially in line with the focus, whereby the focus remains essentially stationary during a scanning motion.
- the rotation axis is preferably adapted for displacement along a linear path while the element housing the X-ray source and the line scan camera rotates to perform a scanning motion. Displacement of the rotation axis during a scanning motion can also be adapted to occur along a curving or meandering path, whereby a more accurate result is achieved regarding the immobility of the focus than by a combination of linear motion and rotary motion.
- FIG. 1 shows the performance of prior art single-point projection imaging in a schematic view of principle
- fig. 2 shows one apparatus adaptable to a method of the invention in a schematic side view
- fig. 3 shows the apparatus of fig. 2 in a plan view
- fig. 4 shows schematically the impact on an effective focus created by a rotary motion of the X-ray source and the detector
- fig. 5 shows schematically the position of an effective focus in the process of displacing the rotation axis during a rotary motion.
- a panoramic X-ray apparatus 10 shown in fig. 2 comprises a vertical member 11, from which extends a horizontal member 13 having suspended therefrom, pivotably about a rotation axis 6, a C-frame 12, having one 14 of its upright arms provided with an X-ray source with its focus indicated by reference numeral 1 and having a primary collimator in the vicinity thereof, indicated by reference numeral 6.
- a second upright arm 15 is provided with a line scan camera, including a detector 7, preferably a CCD detector.
- the panoramic imaging apparatus and its operation is known as such for a skilled person.
- an object to be imaged is placed between the arm members of the C-frame 12 by means of appropriate guides and supports, whereafter the X-ray source is activated and the C- frame 12 is rotated around the rotation axis 6, the primary collimator 5 having its aperture chosen in such a way that a beam 7 in a substantially vertical plane is focused on the detector 7, which is fitted behind the substantially vertical slit of a line scan camera mounted on the arm member 15 of the C-frame 12 and from which visual information is conveyed further, e.g. to a microprocessor.
- the operation of a line scan camera is described e.g. in US Patent Application 20030161438 Al and the operation of a detector e.g. in US patent 5,528,645, and, thus, those are not described in further detail in this specification.
- the rotation axis 6 is adapted for displacement in a slot 8 along a linear path.
- FIG 4 illustrates a situation, in which the rotation axis 6 remains stationary, whereby, as the X- ray source is rotating around a centre of rotation defined by the rotation axis 6, the X-ray beams 21 travel at each angular position through the centre of rotation, whereby the effective focal spot for radiation arriving at an image plane (detector) 18 by way of an object 17 will be constituted by the centre of rotation.
- the focus 1 moves relative to the object 17 during the rotary motion.
- the rotation axis 6 is adapted for displacement preferably by a linear movement transversely to the beam 21.
- Fig. 5 illustrates a situation, in which the rotation axis has been displaced during a rotary motion by a linear movement from a position 6a to a position 6b, whereby the centre of rotation and hence the effective focal spot shifts to essentially coincide with the X-ray source's focus 1, said focus 1 remaining substantially stationary during the imaging process.
- both horizontal and vertical magnification is equal at each point between focus and detector and, hence, the ratio of magnification (SID/SOD) will be equal because the focus remains effectively stationary.
- the inventive solution enables the use of presently available panoramic equipment for single-point projection imaging by providing the same with necessary programming modifications, which allow the execution of a scanning motion in such a way that the focus 1 remains essentially stationary during the imaging process unlike in panoramic tomography, in which the objective is to provide a slice image by means of a continuous steady movement of the effective focus.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602004025501T DE602004025501D1 (en) | 2003-12-15 | 2004-11-22 | METHOD AND DEVICE FOR PERFORMING A SINGLE POINT PROJECTION IMAGING |
EP04820079A EP1697794B1 (en) | 2003-12-15 | 2004-11-22 | Method and apparatus for performing single-point projection imaging |
JP2006544480A JP4637854B2 (en) | 2003-12-15 | 2004-11-22 | Method and apparatus for performing single point projection imaging |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/736,447 | 2003-12-15 | ||
US10/736,447 US6990174B2 (en) | 2003-12-15 | 2003-12-15 | Method and apparatus for performing single-point projection imaging |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005057279A1 true WO2005057279A1 (en) | 2005-06-23 |
Family
ID=34653913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2004/050169 WO2005057279A1 (en) | 2003-12-15 | 2004-11-22 | Method and apparatus for performing single-point projection imaging |
Country Status (6)
Country | Link |
---|---|
US (1) | US6990174B2 (en) |
EP (1) | EP1697794B1 (en) |
JP (1) | JP4637854B2 (en) |
KR (1) | KR100853738B1 (en) |
DE (1) | DE602004025501D1 (en) |
WO (1) | WO2005057279A1 (en) |
Families Citing this family (21)
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US7103574B1 (en) * | 1999-03-27 | 2006-09-05 | Microsoft Corporation | Enforcement architecture and method for digital rights management |
FI114383B (en) * | 2000-02-18 | 2004-10-15 | Instrumentarium Corp | Method for performing mullet photography |
US7370212B2 (en) * | 2003-02-25 | 2008-05-06 | Microsoft Corporation | Issuing a publisher use license off-line in a digital rights management (DRM) system |
US20060242406A1 (en) * | 2005-04-22 | 2006-10-26 | Microsoft Corporation | Protected computing environment |
US8347078B2 (en) | 2004-10-18 | 2013-01-01 | Microsoft Corporation | Device certificate individualization |
US20060089917A1 (en) * | 2004-10-22 | 2006-04-27 | Microsoft Corporation | License synchronization |
US20060106920A1 (en) * | 2004-11-15 | 2006-05-18 | Microsoft Corporation | Method and apparatus for dynamically activating/deactivating an operating system |
US8464348B2 (en) * | 2004-11-15 | 2013-06-11 | Microsoft Corporation | Isolated computing environment anchored into CPU and motherboard |
US8336085B2 (en) | 2004-11-15 | 2012-12-18 | Microsoft Corporation | Tuning product policy using observed evidence of customer behavior |
US8176564B2 (en) * | 2004-11-15 | 2012-05-08 | Microsoft Corporation | Special PC mode entered upon detection of undesired state |
US8438645B2 (en) | 2005-04-27 | 2013-05-07 | Microsoft Corporation | Secure clock with grace periods |
US8725646B2 (en) * | 2005-04-15 | 2014-05-13 | Microsoft Corporation | Output protection levels |
US9436804B2 (en) * | 2005-04-22 | 2016-09-06 | Microsoft Technology Licensing, Llc | Establishing a unique session key using a hardware functionality scan |
US9363481B2 (en) | 2005-04-22 | 2016-06-07 | Microsoft Technology Licensing, Llc | Protected media pipeline |
US20060265758A1 (en) * | 2005-05-20 | 2006-11-23 | Microsoft Corporation | Extensible media rights |
US8353046B2 (en) * | 2005-06-08 | 2013-01-08 | Microsoft Corporation | System and method for delivery of a modular operating system |
US7302031B2 (en) * | 2005-10-27 | 2007-11-27 | Sectra Mamea Ab | Method and arrangement relating to X-ray imaging |
FI120760B (en) * | 2006-05-31 | 2010-02-26 | Palodex Group Oy | Method and apparatus for medical X-ray imaging |
US7309161B1 (en) * | 2006-10-25 | 2007-12-18 | Agilent Technologies, Inc. | Method for determination of magnification in a line scan camera |
ITBO20110765A1 (en) | 2011-12-28 | 2013-06-29 | Cefla Coop | APPARATUS FOR DENTAL RADIOGRAPHY WITH IMPROVED ACCURACY |
KR20150088679A (en) | 2014-01-24 | 2015-08-03 | 주식회사바텍 | Apparatus for Obtaining Computed Tomography |
Citations (7)
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US3636349A (en) * | 1970-01-27 | 1972-01-18 | Pennwalt Corp | Continuous orbit panographic x-ray |
US3831034A (en) * | 1972-05-29 | 1974-08-20 | Morita Mfg | Apparatus for taking a continuous x-ray picture of the dental arch |
US4145611A (en) * | 1976-12-10 | 1979-03-20 | Den-Tal-Ez Mfg. Co. | X-ray source moving mechanism intended for panoramic radiography |
US5528645A (en) | 1994-07-18 | 1996-06-18 | Instrumentarium Corp. | method and device for the adjustment of imaging values in a panoramic X-ray imaging apparatus |
WO2001035829A1 (en) | 1999-11-18 | 2001-05-25 | University Of Rochester | Apparatus and method for cone beam volume computed tomography mammography |
US6256369B1 (en) | 1999-03-31 | 2001-07-03 | Analogic Corporation | Computerized tomography scanner with longitudinal flying focal spot |
US20030161438A1 (en) | 2000-02-18 | 2003-08-28 | Douglas Woods | Method for imaging the head area |
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FI89313C (en) * | 1985-09-13 | 1995-12-04 | Planmeca Oy | Styrsystem Foer panoramatomografiroentgenanordning |
US4823369A (en) * | 1987-02-16 | 1989-04-18 | Siemens Aktiengesellschaft | Dental x-ray diagnostics installation for producing panorama slice exposures of the jaw of a patient |
JPH06317542A (en) * | 1993-05-10 | 1994-11-15 | Toshiba Corp | Radioscopic examination device |
JP3441578B2 (en) * | 1995-11-22 | 2003-09-02 | 株式会社モリタ製作所 | Dental panoramic radiography device |
FI104943B (en) * | 1998-06-26 | 2000-05-15 | Planmeca Oy | Method, apparatus and their use in tomography imaging |
FI104944B (en) * | 1998-06-26 | 2000-05-15 | Planmeca Oy | Methods, equipment and imaging mode for tomography imaging |
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FI114383B (en) * | 2000-02-18 | 2004-10-15 | Instrumentarium Corp | Method for performing mullet photography |
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2003
- 2003-12-15 US US10/736,447 patent/US6990174B2/en not_active Expired - Fee Related
-
2004
- 2004-11-22 KR KR1020067011834A patent/KR100853738B1/en not_active IP Right Cessation
- 2004-11-22 DE DE602004025501T patent/DE602004025501D1/en active Active
- 2004-11-22 WO PCT/FI2004/050169 patent/WO2005057279A1/en not_active Application Discontinuation
- 2004-11-22 JP JP2006544480A patent/JP4637854B2/en not_active Expired - Fee Related
- 2004-11-22 EP EP04820079A patent/EP1697794B1/en not_active Expired - Fee Related
Patent Citations (7)
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US3636349A (en) * | 1970-01-27 | 1972-01-18 | Pennwalt Corp | Continuous orbit panographic x-ray |
US3831034A (en) * | 1972-05-29 | 1974-08-20 | Morita Mfg | Apparatus for taking a continuous x-ray picture of the dental arch |
US4145611A (en) * | 1976-12-10 | 1979-03-20 | Den-Tal-Ez Mfg. Co. | X-ray source moving mechanism intended for panoramic radiography |
US5528645A (en) | 1994-07-18 | 1996-06-18 | Instrumentarium Corp. | method and device for the adjustment of imaging values in a panoramic X-ray imaging apparatus |
US6256369B1 (en) | 1999-03-31 | 2001-07-03 | Analogic Corporation | Computerized tomography scanner with longitudinal flying focal spot |
WO2001035829A1 (en) | 1999-11-18 | 2001-05-25 | University Of Rochester | Apparatus and method for cone beam volume computed tomography mammography |
US20030161438A1 (en) | 2000-02-18 | 2003-08-28 | Douglas Woods | Method for imaging the head area |
Also Published As
Publication number | Publication date |
---|---|
KR100853738B1 (en) | 2008-08-25 |
EP1697794A1 (en) | 2006-09-06 |
US6990174B2 (en) | 2006-01-24 |
EP1697794B1 (en) | 2010-02-10 |
KR20060101535A (en) | 2006-09-25 |
US20050129173A1 (en) | 2005-06-16 |
JP4637854B2 (en) | 2011-02-23 |
DE602004025501D1 (en) | 2010-03-25 |
JP2007514172A (en) | 2007-05-31 |
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