US20080245973A1 - Computed radiography x-ray cassette with rigid embedded cr plate - Google Patents
Computed radiography x-ray cassette with rigid embedded cr plate Download PDFInfo
- Publication number
- US20080245973A1 US20080245973A1 US12/118,310 US11831008A US2008245973A1 US 20080245973 A1 US20080245973 A1 US 20080245973A1 US 11831008 A US11831008 A US 11831008A US 2008245973 A1 US2008245973 A1 US 2008245973A1
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- United States
- Prior art keywords
- cassette
- plate
- scanner
- photostimulatable
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/022—Viewing apparatus
- G02B27/023—Viewing apparatus for viewing X-ray images using image converters, e.g. radioscopes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
- H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/04—Scanning arrangements
- H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
- H04N2201/0418—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207 capable of scanning transmissive and reflective originals at a single scanning station
-
- 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
- Y10S359/00—Optical: systems and elements
- Y10S359/90—Methods
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Facsimile Scanning Arrangements (AREA)
- Radiography Using Non-Light Waves (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Embodiments include a method and apparatus for improving the reusability of a computed radiography (CR) plate by housing it in a cassette. The CR plate remains in the cassette during scanning. The embodiments of the method and apparatus improve the reusability of the CR plate.
Description
- The application is a Divisional of patent application Ser. No. 10/714,087, filed Nov. 13, 2003 entitled, “COMPUTED RADIOGRAPHY X-RAY CASSETTE WITH RIGID EMBEDDED CR PLATE,” which is a Continuation-In-Part of co-pending patent application Ser. No. 10/386,326, filed Mar. 10, 2003 entitled, “AN APPARATUS AND METHOD OF CAPTURING IMAGES FROM ALTERNATIVE MEDIA TYPES,” which is a Divisional of Issued U.S. Pat. No. 6,532,092, which is a Continuation of Issued U.S. Pat. No. 6,188,501.
- 1. Field of the Invention
- The embodiments of the invention relate to x-ray cassettes and computed radiography plates. Specifically, embodiments of the invention relate to a system for creating images from a plate in a cassette and erasing the plate with improved reusability of the plate.
- 2. Background
- Traditional x-ray film has been used for decades. 28 years ago, a fundamental innovation by Kodak created the first version of a re-usable X-ray plate instead of film. These Computed Radiography (CR) plates store a latent image in a photostimulatable storage phosphor plate. Fuji improved on the Kodak concept and produced the first medical X-ray images using this technique. The CR plate is reflective and erasable allowing repeated exposures, the number of possible exposures is greater than 150,000 if there are no mechanical stresses on the material. An x-ray impregnates the plate with energy which, when subsequently exposed to a particular excitation, is released, recreating the image. Scanners or CR readers of these plates typically include a flying spot laser and photomultiplier tube sensor. The photo multiplier tube captures the image corresponding to the energy being released by excitation of the flying spot laser. The plate is traditionally removed from a cassette and transported by a drive mechanism, typically a set of rollers. This roller type reading process necessitates that the phosphorescent plate be flexible. The feed mechanism used for scanning the plates is typically a set of pinch rollers. Over time the flexing and contact with the rollers causes a deleterious effect on the plate resulting in limited reusability. The phosphor materials in the plates do not degrade due to read/write cycles if mechanical and physical stresses do not act on the plate. Additional wear and tear on the plate is caused by the removal and replacement of the plate in a cassette that protects the plate from ambient energy (light) sources during transportation. In addition to causing degradation of the quality of the plate the pinch rollers can slip causing line artifacts and blurring of the image being generated.
- Embodiments of the invention are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that different references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.
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FIG. 1A is a diagram of a closed cassette. -
FIG. 1B is a diagram of an open cassette. -
FIG. 2 is a side view of a scanning device and cassette with an exploded view of the coupling mechanism. -
FIG. 3A is a diagram of scanner prior to loading of a cassette. -
FIG. 3B is a diagram of a scanner with an attached cassette. -
FIG. 3C is a diagram of a scanner with a secured cassette. -
FIG. 4 is a diagram of a latching mechanism for a cassette. -
FIG. 5 is a flowchart of the operation of scanner operation. -
FIG. 1A is a diagram of a closed cassette. In one embodiment,cassette 101 includeshousing 111 to enclose a computed radiography plate. A computed radiography (CR) plate may be a plate covered in a phosphor storage material used to capture x-ray images. In another embodiment, other photostimulatable materials may be used to construct the CR plate.Housing 111 is constructed primarily from carbon fiber, aluminum, Delrin plastic and similar material that protect the CR plate from ambient energy sources. - In one embodiment,
cassette 101 includes a slidingcover 103 or similar mechanism to provide access to an internal cavity ofcassette 111 where the CR plate is embedded. In another embodiment, other exposure mechanisms may be employed to control access to the CR plate stored withinhousing 111. This may include hinged doors, spring loaded covers, form fit covers, snap fit covers and similar configurations. The CR plate may be affixed to the sliding or moving cover. In one embodiment,cassette 101 meets national emergency medicine association (NEMA) standards for size of x-ray cassettes. - In one embodiment, at either end of the cassette may be a set of
steel strips Steel strips Steel strip 105 may be attached to the housing.Steel strip 115 may be attached to slidingcover 103.Cover 103 may slide in a track defined byhousing 111 or move in relation tohousing 111 by hinge or similar mechanism. In one embodiment, cover may be removed fromcassette 101.Cover 103 may be constructed of carbon fiber, aluminum, Delrin plastic or similar materials. Steel strips 105, 115 may be used to move or holdcover 103 in relation tohousing 111 in order to open andclose cassette 101. Steel strips 105, 115 may include anotch 107.Notch 107 may be used to positioncassette 101 in relation to a scanner. Magnetized protrusions may be attached to the scanner to interact with thenotches 107 to allow manipulation of the cassette to open and close the cassette. In another embodiment, physical interconnections betweencassette 101 andscanner 301 may be used to movecover 103 in relation tohousing 111. - In one embodiment,
cassette 101 may include anattachment mechanism 109 along an edge or side ofcassette 101.Attachment mechanism 109 may be a clip, groove to fit a complementary tongue, hook or similar connection mechanism. - In one embodiment,
cassette 101 may have a label attached to an outer surface. The label may be a bar code or similar electronically readable label. The label may be used to identify a patient, identify characteristics such as size of cassette and encode similar information. -
FIG. 1B is an illustration of a partially opened cassette. In one embodiment,cassette 101 encloses aCR plate 113.CR plate 113 may be exposed to a scanner or for other purposes by movement ofhousing 111 in relation to cover 103. Cover 103 may be form fit into a set of tracks in the housing allowing easy movement between an open and closed position. -
FIG. 2 is a cross section illustration of a securing mechanism. In one embodiment,cassette 101 may include a securing mechanism to securecover 103 in relation tohousing 111. In one embodiment, the securing mechanism may be alatch 201.Latch 201 may be spring loaded or similarly biased into a lock position where acatch 203 oncover 103 is engaged bylatch 201. This prevents the movement ofcover 103 in relation tohousing 111. The locked position provides protection forCR plate 113 during transport. Ifcover 103 were to open accidentally then ambient energy sources may damage the stored image. In oneembodiment latch 201 may be attached tohousing 111 near the edge whereattachment mechanism 109 is present.Latch 201 may include aprotrusion 205 that protrudes through the exterior ofhousing 111. Pressure exerted onprotrusion 205 may releaselatch 201 and allow the movement ofcover 103. In one embodiment, the attachment ofcassette 101 to a scanner automatically disengageslatch 201. -
FIGS. 3A-3B illustrate the attachment of acassette 101 to ascanner 301.FIG. 3A illustrates an embodiment where ascanner 301 has anopen panel 303 for the insertion ofcassette 101.Cassette 101 may be loaded throughfront panel 303. In another embodiment,scanner 301 does not have afront panel 303.Cassette 101 is placed adjacent a flat surface ofscanner 301. -
FIG. 3B illustrates the initial attachment ofcassette 101 using a hook or cliptype attachment mechanism 109. In one embodiment,cassette 101 is attached toscanner 301 using a hook or cliptype attachment mechanism 109.Cassette 101 is angled to insert the forward protruding section of the hook, clip or similar device into a receiving groove, hook, slot or similar mechanism. -
FIG. 3C is an illustration of the final placement ofcassette 101 inscanner 301. In one embodiment,cassette 101 is laid flat against a surface ofscanner 301.Cassette 101 may be coupled in a removable manner toscanner 301. The coupling mechanism may be a complementary hook, slot, groove, clip or similar system. In another embodiment,cassette 101 is form fit or set in a track inscanner 301.Scanner 301 may include a sliding or hingeddoor 305 topanel 303 that may completely enclosecassette 101. - In one embodiment,
scanner 301 may movecassette 101 in a lateral or horizontal direction across the surface ofscanner 301.Scanner 301 may include a scanning head such as a photo multiplier or charged coupled device (CCD) to capture the image ofCR plate 113 as it is moves past the head. A set of magnets inscanner 301 may exert force onsteel strips housing 111 while holdingcover 103 in place thereby to exposeCR plate 113 to the scanner head. In one embodiment, the magnets utilized inscanner 301 have a complementary polarity to magnetizedsteel strips CR plate 113 may be attached to cover 103 and cover 103 moved pastscanner 301. In a further embodiment, alternative movement mechanisms may be used to movehousing 111 andcover 103. The movement mechanism may physically grip either cover 103 orhousing 111 to move each component in relation to the other and to the scan head. Other movement mechanisms may include rollers, moving tracks, belts and similar mechanisms.Scanner 301 may also include a laser, set of light emitting diodes (LED) or similar energy source to eraseCR plate 113. - In one embodiment,
scanner 301 has a flat scan path to enable the reading of labels oncassette 101.Scanner 301 may include a label reader such as a bar code scanner.Scanner 301 may obtain information about a patient or the content of the x-ray being scanned or may obtain information about the characteristics ofcassette 101 from the label.Scanner 301 may utilize the information obtained from the label to adjust the manner in whichcassette 101 is scanned such as adjusting the length or speed of the scan or making similar adjustments. In one embodiment, data read from the label may influence handling of the digital representation captured byscanner 301. For example, label content may indicate where in memory or the file system of the host computer the digital representation is stored. -
FIG. 4 is a side view illustration of a non-enclosing scanner with and exploded view of an attachment mechanism. In one embodiment,attachment mechanism 109 may be a clip with acomplementary slide clip 401 attached toscanner 301.Cassette 101 may rest against the front surface ofscanner 301.Clip 109 may be nestled into an interlocking position withslide clip 401.Slide clip 401 may run the full length ofcassette 101 andclip 109.Slide clip 401 may slide laterally or horizontally in a track or similar mechanism to allow the movement ofcassette 101 past a scan head and erasure mechanism.Attachment mechanism 109 interlocked withslide clip 401 or similar mechanism may form an ultra rigid scan substrate forCR plate 113 to be scanned byscanner 301. In an exemplary embodiment,cassette 101 may have a cliptype attachment mechanism 109 along the length of an upper edge.Cassette 101 may be placed at an angle to acomplementary slide clip 401 onscanner 301. In this position the protruding edges of the complementary clips may rest against one another. A slight rotation ofcassette 101 towardscanner 301 brings the complementary clips into an interlocking position andcassette 101 may rest flatly againstscanner 301. A lateral force pushing or pullingcassette 101 away fromscanner 301 may cause the clip ofcassette 101 to disengage fromslide clip 401. - In one embodiment, the secure attachment of
cassette 101 toscanner 301 enables an ultra high resolution scan process wherecassette 101 is driven past a scan head to obtain high fidelity. Thus, the scan resolution is not diminished by the slipping of pinch rollers. The system completes a scan ofCR plate 113 without touchingCR plate 113. This results in a scanning process that reduces wear on the photostimulatable material, enhances the lifetime ofCR plate 113 and improves the reading ofCR plate 113 during scanning. Scan and erase may take place simultaneously with the erase following the scan on thesame cassette 101. This increases the throughput for the scanning system. This system may scan aCR plate 113 on average at a rate of better than twenty five seconds for a fourteen inch by seventeen inch plate. - In one embodiment,
cassette 101 may have a concave inner surface or shape to define a concave space forCR plate 113. CR plate may have a matching concave shape. The concavity ofCR plate 113 allows the scanning process and x-ray process to occur on a curved surface. The curve of the plate may match the spread of x-ray energy and the sweep of a scanning laser. The curve ofCR plate 113 may be matched to the scanning laser to allow the operation of the scanner without the use of an F theta lens. F theta lenses have a high cost and ascanner 301 that does not require an F theta lens may have a reduced cost to manufacture. Scanning may be done under this circumstance without losing fidelity in the scanning process. The laser spot size will change as the laser scans from top to bottom along a flat surface. The spot may remain constant in size if the focal distance of the laser is maintained at a constant by curvingCR plate 113 inside ofcassette 113. -
FIG. 5 is a flowchart of the operation of a scanningdevice utilizing cassettes 101. In one embodiment,cassette 101 must be loaded into scanner 301 (block 501).Loading cassette 101 intoscanner 301 may automatically unlockcassette 101 vialatch 201 or similar securing mechanism. In one embodiment, loadingcassette 101 involves engaging complementary attachment mechanisms ofcassette 101 andscanner 101.Cassette 101 may have anattachment mechanism 109 such as a clip, hook, or similar attachment mechanism.Scanner 301 may have acomplementary clip 401, hook, latch or similar attachment mechanism. - In one embodiment,
scanner 301 may start to movecassette 101 via magnetic force, motorized movement of slidingclip 401 or similar movement mechanism whilecover 103 is held in position by a magnetic force, latch or similar restraint thereby exposingCR plate 113 to scanner 301 (block 503). In an exemplary embodiment,cassette 101 may be attached to slidingclip 401. Slidingclip 401 may be attached to a track to allow it to slide across the surface ofscanner 301. In one embodiment, the length of the slide track is approximately equal to twice the size of a cassette to allow a slide to completely exposeCR plate 113 by slidingcassette 101 away fromcover 103. Movement of slidingclip 401 in the track may be effected by an electric motor or similar mechanism. In one embodiment,scanner 301 may stimulate the phosphorous material ofCR plate 113 using a flying spot laser or similar device whilecassette 101 slides across the surface of scanner 301 (block 505).Scanner 301 continues to moveCR plate 113 past a scanner head such as a photo multiplier or CCD to image the CR plate 113 (block 507). - In one embodiment, after
CR plate 113 or a section ofCR plate 113 has been imaged,scanner 301 may erase the plate or section using an LED or similar device (block 509). After the erasure and scan,scanner 301 may returncassette 101 to a closed position by slidingclip 401 back to its start position on the scanner track before allowing it to be unloaded (block 511). Whencassette 101 is removed the locking mechanism may be engaged preventing accidental exposure during transport. -
Cassette 101 may improve the reusability of aCR plate 113 by protectingCR plate 113 throughout its use.CR plate 113 remains encased incassette 101 during x-ray capture, scan, erase and further reuse ofCR plate 113.Cassette 101 prevents wear and tear onCR plate 113 that may cause it to degrade. For example,cassette 101 may be used when a patient has an x-ray taken without removingCR plate 113 fromcassette 101.Cassette 101 may then be safely transported toscanner 301 where it is imaged and erased and made ready for reuse withoutCR plate 113 making any physical contact withscanner 301 or users. In one embodiment,scanner 301 may be part of a hybrid direct radiology solution. A patient may stand in front of an embedded CR plate in a cassette while in an enclosure where the plate receives the x-rays andscanner 301 reads and erasesCR plate 113. Two cassettes may be rotated intoscanner 301 to maintain oneCR plate 113 in position for x-rays. - In the foregoing specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes can be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (9)
1. A system comprising:
a scanning device; and
a cassette removably coupled to the scanning device comprising a housing, a photostimulatable unit securely coupled to the housing and a cover movably coupled to the housing to move between a first position concealing the photostimulatable unit in the housing and a second position revealing the photostimulatable unit.
2. The system of claim 1 , wherein the scanning device comprises an erasing device.
3. The system of claim 1 , wherein the scanning device comprises a chamber to protect the photostimulatable unit from ambient energy sources when exposed.
4. The system of claim 2 , wherein the photostimulatable unit is a computed radiography plate.
5. The system of claim 1 , wherein the scanning device and cassette have a complementing interconnection mechanism.
6. A method comprising:
revealing a photostimulatable unit to a scanning device without decoupling the photostimulatable unit from a cassette;
stimulating the photostimulatable unit;
scanning the activated photostimulatable unit; and
erasing the photostimulatable unit.
7. The method of claim 6 , further comprising:
closing the cassette to return the photostimulatable unit to a concealed position.
8. The method of claim 6 , wherein the photostimulatable unit is a computed radiography plate.
9. The method of claim 6 , further comprising:
unlocking a cover of the cassette.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/118,310 US20080245973A1 (en) | 1999-11-24 | 2008-05-09 | Computed radiography x-ray cassette with rigid embedded cr plate |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/450,031 US6188501B1 (en) | 1999-11-24 | 1999-11-24 | Apparatus and method of capturing images from alternative media types |
US09/747,616 US6532092B2 (en) | 1999-11-24 | 2000-12-20 | Apparatus and method of capturing images from alternative media types |
US10/386,326 US7808688B2 (en) | 1999-11-24 | 2003-03-10 | Apparatus and method of capturing images from alternative media types |
US10/714,087 US7375350B2 (en) | 1999-11-24 | 2003-11-13 | Computed radiography x-ray cassette with rigid embedded CR plate |
US12/118,310 US20080245973A1 (en) | 1999-11-24 | 2008-05-09 | Computed radiography x-ray cassette with rigid embedded cr plate |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/714,087 Division US7375350B2 (en) | 1999-11-24 | 2003-11-13 | Computed radiography x-ray cassette with rigid embedded CR plate |
Publications (1)
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US20080245973A1 true US20080245973A1 (en) | 2008-10-09 |
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ID=23786483
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
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US09/450,031 Expired - Lifetime US6188501B1 (en) | 1999-11-24 | 1999-11-24 | Apparatus and method of capturing images from alternative media types |
US09/747,616 Expired - Lifetime US6532092B2 (en) | 1999-11-24 | 2000-12-20 | Apparatus and method of capturing images from alternative media types |
US10/386,326 Expired - Fee Related US7808688B2 (en) | 1999-11-24 | 2003-03-10 | Apparatus and method of capturing images from alternative media types |
US12/118,310 Abandoned US20080245973A1 (en) | 1999-11-24 | 2008-05-09 | Computed radiography x-ray cassette with rigid embedded cr plate |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
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US09/450,031 Expired - Lifetime US6188501B1 (en) | 1999-11-24 | 1999-11-24 | Apparatus and method of capturing images from alternative media types |
US09/747,616 Expired - Lifetime US6532092B2 (en) | 1999-11-24 | 2000-12-20 | Apparatus and method of capturing images from alternative media types |
US10/386,326 Expired - Fee Related US7808688B2 (en) | 1999-11-24 | 2003-03-10 | Apparatus and method of capturing images from alternative media types |
Country Status (4)
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EP (1) | EP1236346A2 (en) |
AU (1) | AU3266801A (en) |
WO (1) | WO2001039492A2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US7808688B2 (en) | 2010-10-05 |
WO2001039492A3 (en) | 2001-12-13 |
US6532092B2 (en) | 2003-03-11 |
US20010002151A1 (en) | 2001-05-31 |
US20030169471A1 (en) | 2003-09-11 |
EP1236346A2 (en) | 2002-09-04 |
WO2001039492A2 (en) | 2001-05-31 |
AU3266801A (en) | 2001-06-04 |
US6188501B1 (en) | 2001-02-13 |
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Legal Events
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