US20050002547A1 - Remote interpretation of medical images - Google Patents
Remote interpretation of medical images Download PDFInfo
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- US20050002547A1 US20050002547A1 US10/803,194 US80319404A US2005002547A1 US 20050002547 A1 US20050002547 A1 US 20050002547A1 US 80319404 A US80319404 A US 80319404A US 2005002547 A1 US2005002547 A1 US 2005002547A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/20—ICT specially adapted for the handling or processing of medical images for handling medical images, e.g. DICOM, HL7 or PACS
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
- G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
- G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
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- 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
- H04N1/21—Intermediate information storage
- H04N1/2166—Intermediate information storage for mass storage, e.g. in document filing systems
- H04N1/217—Interfaces allowing access to a single user
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/162—User input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
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- H—ELECTRICITY
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- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/99—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals involving fractal coding
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- G06T2207/10116—X-ray image
Definitions
- Pathologists typically use microscopes when diagnosing physiological conditions such as cancer, infectious disease and prenatal disorders.
- tissue samples on a slide are loaded onto the microscope, the microscope objective or lens focuses on an area of the sample, and the sample is scanned for particular features or objects of interest. In this manner, the microscope helps the pathologist to visually determine the presence of abnormal numbers or types of cells, organelles, organisms or biological markers.
- the medical imaging system provides an environment for storing and retrieving the medical images produced by the microscopes.
- the components of the medical imaging system are spread throughout the department or hospital, or even located remotely, and connected by a communication network.
- An image acquisition device is coupled to the microscope and captures images produced by the microscope.
- the image acquisition device can include a variety of components.
- the image acquisition device can include a video camera coupled to a high-speed frame grabber for capturing the stream of video produced by the video camera and generating a series of digital images.
- the electronic camera can be a megapixel digital camera.
- the microscope and the image acquisition device can acquire images for a number of different color planes and at several different focal planes. These images can be stitched together to form a two-dimensional or three-dimensional composite image.
- the composite images place significant storage and bandwidth requirements on the medical imaging system. For example, a composite image for a single tissue slide can often exceed a gigabyte in size.
- Diagnostic quality view stations display the images captured by the image acquisition system.
- a view station is able to perform a variety of image analysis operations on the medical image for the purposes of diagnosis.
- image analysis operations are not used to manipulate or produce another image from a subject image, but rather to analyze the information in the subject image to produce a “non-image” result, such as a fixed number (or “score”), often falling within a predetermined range.
- the pathologist at the view stations may invoke algorithms to perform densitometry on selected regions of the medical image in order to identify concentration of a particular analyte within the tissue sample.
- Other image analysis operations are useful for finding objects within the image such as the nuclei of the cells, computing an integrated optical density for the nuclei of the cells and reporting the number of molecules per cell.
- FIG. 1 is a block diagram providing a high-level illustration of the various components of the invention.
- the remote view station 26 may then use the difference data and compressed (and/or decompressed) image file to reconstruct an image of the selected region of higher resolution for display at the remote view station 26 .
- the amount of data transmitted over the network may be significantly reduced, thereby reducing network traffic and transmission times.
- the invention can be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations thereof. Furthermore, the invention can be implemented in one or more computer programs that are executable within an operating environment of a programmable system embodied and tangibly stored in a machine-readable storage device.
- FIG. 3 illustrates an example of a computer 100 suitable for use as view station 26 in order to implement or perform various embodiments of the invention.
- the computer 100 includes a processor 112 that in one embodiment belongs to the PENTIUM® family of microprocessors manufactured by the Intel Corporation of Santa Clara, Calif.
- Computer 100 includes system memory 113 , including read only memory (ROM) 114 and random access memory (RAM) 115 , which is connected to the processor 112 by a system data/address bus 116 .
- ROM 114 represents any device that is primarily read-only including electrically erasable programmable read-only memory (EEPROM), flash memory, etc.
- RAM 115 represents any random access memory such as Synchronous Dynamic Random Access Memory.
- input/output bus 118 is connected to the data/address bus 116 via bus controller 119 .
- input/output bus 118 is implemented as a standard Peripheral Component Interconnect (PCI) bus.
- PCI Peripheral Component Interconnect
- the bus controller 119 examines all signals from the processor 112 to route the signals to the appropriate bus. Signals between the processor 112 and the system memory 113 are merely passed through the bus controller 119 . However, signals from the processor 112 intended for devices other than system memory 113 are routed onto the input/output bus 118 .
- Various devices are connected to the input/output bus 118 including hard disk drive 120 , floppy drive 121 that is used to read floppy disk 151 , and optical drive 122 , such as a CD-ROM drive that is used to read an optical disk 152 .
- the video display 124 or other kind of display device is connected to the input/output bus 118 via a video adapter 125 and preferably is a high-resolution display suitable for viewing medical images.
- Computer 100 also includes a modem 129 and network interface 53 for communicating over network 20 via either a wired or wireless connection.
- a medical professional enter commands and information into the computer 100 by using a keyboard 140 and/or pointing device, such as a mouse 142 , which are connected to bus 118 via input/output ports 128 .
- a keyboard 140 and/or pointing device such as a mouse 142
- Other types of pointing devices include track pads, track balls, joysticks, data gloves, head trackers, and other devices suitable for positioning a cursor on the video display 124 .
- BIOS 117 is a set of basic executable routines that help transfer information between the computing resources within the computer 100 .
Abstract
Description
- This application is a continuation-in-part of and claims priority to U.S. application Ser. No. 09/542,091, filed on Apr. 3, 2000, which is incorporated herein in its entirety.
- Pathologists typically use microscopes when diagnosing physiological conditions such as cancer, infectious disease and prenatal disorders. Typically, tissue samples on a slide are loaded onto the microscope, the microscope objective or lens focuses on an area of the sample, and the sample is scanned for particular features or objects of interest. In this manner, the microscope helps the pathologist to visually determine the presence of abnormal numbers or types of cells, organelles, organisms or biological markers.
- Recently, automated microscopes have been integrated into medical imaging systems that include a variety of networked components. The medical imaging system provides an environment for storing and retrieving the medical images produced by the microscopes. The components of the medical imaging system are spread throughout the department or hospital, or even located remotely, and connected by a communication network.
- An image acquisition device is coupled to the microscope and captures images produced by the microscope. The image acquisition device can include a variety of components. For example, the image acquisition device can include a video camera coupled to a high-speed frame grabber for capturing the stream of video produced by the video camera and generating a series of digital images. Alternatively, the electronic camera can be a megapixel digital camera. The microscope and the image acquisition device can acquire images for a number of different color planes and at several different focal planes. These images can be stitched together to form a two-dimensional or three-dimensional composite image. As a result of the combination, and because the images are typically in color and at high-resolution, the composite images place significant storage and bandwidth requirements on the medical imaging system. For example, a composite image for a single tissue slide can often exceed a gigabyte in size.
- Image storage and archival devices provide a central library for storing the medical images captured by the image acquisition device. Image storage devices include one or more databases and image servers for fast access to recently acquired images. Archival devices, such as optical disc jukeboxes and tape backup systems, provide long-term storage. When a pathologist wishes to view an archived image, the image is automatically “migrated” from the corresponding archival device to one of the image storage devices.
- Diagnostic quality view stations display the images captured by the image acquisition system. In order to assist the pathologist in interpreting a medical image, a view station is able to perform a variety of image analysis operations on the medical image for the purposes of diagnosis. Unlike other types of image processing, image analysis operations are not used to manipulate or produce another image from a subject image, but rather to analyze the information in the subject image to produce a “non-image” result, such as a fixed number (or “score”), often falling within a predetermined range. For example, the pathologist at the view stations may invoke algorithms to perform densitometry on selected regions of the medical image in order to identify concentration of a particular analyte within the tissue sample. Other image analysis operations are useful for finding objects within the image such as the nuclei of the cells, computing an integrated optical density for the nuclei of the cells and reporting the number of molecules per cell.
- In general, the invention facilitates the remote interpretation of medical images. In order to facilitate the timely diagnosis of a tissue sample, it is desirable that a medical professional, such as a pathologist, be able to remotely view and interpret a medical image. The immense size of a medical image for a single tissue sample typically makes remote viewing unworkable due to bandwidth constraints. Compression algorithms can produce an image suitable for transmission, but the data lost during compression can lead to inaccurate results from the image analysis operations.
- According to one aspect, the invention is directed to a system in which a remote view station is communicatively coupled to an image server and receives a compressed version of a source medical image. The remote view station uncompresses and displays the received medical image. The remote view station selects a region of the displayed medical image as a function of input received from a medical professional, such as a pathologist. Based on the input, the remote view station transmits region information, such as a series of pixel coordinates, back to the image server. The image server applies image analysis operations to a region of the source medical image that corresponds to the selected region of the compressed medical image. In this manner, the data loss that occurs during image compression does not effect the image analysis operations. As such, the image analysis operations produce more accurate results than if the operations were applied by the remote view station on the compressed image.
- In another aspect, the invention is directed to a method for remotely interpreting medical images. According to the method, a compressed medical image is generated from a source medical image and transmitted from an image server to a remote view station for display. In one implementation, the compressed medical image is transmitted over a global packet-switched network such as the Internet. A region of the medical image displayed by the remote view station is selected in response to input from a medical professional. Region information, defining the selected region of the displayed medial image, is transmitted from the remote view station back to the image server. Based on the region information, image analysis operations are applied to a corresponding region of the source medical image. A resulting score is communicated to the remote view station for display. A diagnosis is received from the remote view station and associated with the source medical image in a database maintained by the image server.
- Various embodiments of the invention are set forth in the accompanying drawings and the description below. Other features and advantages of the invention will become apparent from the description, the drawings, and the claims.
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FIG. 1 is a block diagram providing a high-level illustration of the various components of the invention. -
FIG. 2 is a flowchart illustrating one embodiment of a process for remotely interpreting medical images. -
FIG. 3 is a block diagram illustrates one embodiment of a computer suitable for implementing the various embodiments of the invention. -
FIG. 1 is a block diagram illustrating asystem 10 that facilitates remotely viewing and interpreting medical images.System 10 includesremote view station 26 this is communicatively coupled to medical imaging system (MIS) 12 bynetwork 20, which represents any packet-switched network such as a local area network or the Internet. MIS 12 includesimage acquisition devices 14 that represent any medical imaging device that generates digital medical images, such as an electronic camera used in conjunction with an automated microscope. Other image acquisition devices include computed tomography (CT), nuclear medicine, magnetic resonance imaging (MRI), ultrasound and X-ray devices.Image server 24 stores the images that are generated byimage acquisition device 14 and, upon request, communicates the images to viewstations 16 for display. Usingview stations 16, a medical professional, such as a pathologist, can perform a variety of image analysis techniques on selected regions to assist in rendering a diagnosis. - As described in detail below,
image server 24 ofMIS 12 communicates compressed medical images toremote view station 26 for interpretation by a medical professional. Using a network software application, such as a web browser, the medical professional interacts withremote view station 26 to select various regions of interest within the image. Based on the selection,image server 24 applies image analysis functions directly to the source medical image stored onimage server 24, thereby generating a more accurate score than if applied byremote view station 26 to the medical image after compression. The resultant score produced by the image analysis operations is communicated toremote view station 26 to assist the medical professional in interpreting the medical image and rendering a diagnosis. -
FIG. 2 is a flow chart illustrating one implementation of aprocess 28 that facilitates the interpretation of medical images viaremote view station 26. Using a network software application the medical professional interacts withremote view station 26, accessesMIS 12 and receives a list of cases that are marked for review, i.e., cases in which images have been acquired byimage acquisition devices 14 but have not been reviewed by a medical professional (30). Upon reviewing the list displayed byremote view station 26, the medical professional selects one of the cases for review (32). - Based on the selection,
image server 24 compresses medical images associated with the case and communicates the compressed images toremote view station 26 via network 20 (34).Remote view station 26 decompresses the images and displays the uncompressed images for review by the medical professional (36). Theimage server 24 may use a lossy compression technique, e.g., JPEG. Such techniques attempt to eliminate redundant or unnecessary information. Consequently, in lossy compression, some information is lost, and the displayed image is not a pixel-by-pixel duplicate of the original source image stored onimage server 24. Several algorithms, however, are known that can achieve a compression ratio, such that the compressed image uses relatively low bandwidth, without significantly changing the visual representation of the image. Therefore, compressing the image can be effectively lossless with respect to human vision. For example, it has been found that both JPEG compression and fractal image compression, when set for to moderate compression, result in images suitable for transmission without resulting in data loss perceptible with human vision. - Using a pointing device, such as a light pen, mouse or track ball, the medical professional selects one or more regions of interest. The medical professional can tag a region for image analysis or can request that
image server 24 transmit image data for the selected region using a lower compression setting. For example, the medical professional can directimage server 24 to transmit an image using low compression or even to transmit an uncompressed pixel-by-pixel duplicate of the selected region.Remote view station 26 encodes the shape and size of the selected region and transmits the region information toMIS 12 by network 20 (38). The region information defines the boundaries of the selected regions and, in one implementation, is a set of pixel coordinates defining the outlines of the selected regions. As such, the region information typically comprises a small amount information and can be quickly transmitted to imageserver 24. - If the medical professional requests that
image server 24 transmit image data for a region of interest using a lower compression setting, or no compression, then imageserver 24 extracts the corresponding pixel data from the source image and communicates the pixel data to remote view station 26 (40). In this fashion, the medical professional can view regions of interest at higher resolution, or even a pixel-per-pixel duplicate, without requiring thatimage server 24 transmit the entire source image acrossnetwork 20. Upon viewing the region of interest, the medical professional can tag the region for image analysis or can select sub-regions of interest. In an alternative embodiment, theimage server 24 may calculate “difference data” for the selected region, e.g., data lost during the lossy compression operation for the selected region. The image server may then transmit the difference data to theremote view station 26. Theremote view station 26 may then use the difference data and compressed (and/or decompressed) image file to reconstruct an image of the selected region of higher resolution for display at theremote view station 26. By sending only the difference data, the amount of data transmitted over the network may be significantly reduced, thereby reducing network traffic and transmission times. - If the medical professional tags a selected region for image analysis,
image server 24 executes the requested image analysis operation on the corresponding source medical image (42). More specifically,image server 24 analyzes the region information received fromremote view station 26 and applies the image analysis operation to a subset of the pixel data of the source image. The subset pixel data is selected based on the boundaries defined by the region information received fromremote view station 26. In this manner, the image analysis operation produces a more accurate score than if the operation were applied byremote view station 26 to the image that has been compressed for transmission and then uncompressed for display at the remote view station. As such, the data loss that occurs during compression does not effect the image analysis. -
Image server 24 communicates the scores for each region toremote view station 26 for display to the medical professional (44). Based on the visual display of the medical image as well as the scores associated with regions of interest, the medical professional interprets the medical image and renders a diagnosis. For example, the medical professional may determine that a particular tissue sample is cancerous.Remote view station 26 communicates the diagnosis toMIS 12 for association with the appropriate case within a database maintained by image server 24 (46). - The invention can be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations thereof. Furthermore, the invention can be implemented in one or more computer programs that are executable within an operating environment of a programmable system embodied and tangibly stored in a machine-readable storage device.
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FIG. 3 illustrates an example of acomputer 100 suitable for use asview station 26 in order to implement or perform various embodiments of the invention. As shown inFIG. 3 , thecomputer 100 includes aprocessor 112 that in one embodiment belongs to the PENTIUM® family of microprocessors manufactured by the Intel Corporation of Santa Clara, Calif. However,computer 100 can be implemented on computers based upon other microprocessors, such as the MIPS® family of microprocessors from the Silicon Graphics Corporation, the POWERPC® family of microprocessors from both the Motorola Corporation and the IBM Corporation, the PRECISION ARCHITECTURE® family of microprocessors from the Hewlett-Packard Company, the SPARC® family of microprocessors from the Sun Microsystems Corporation, or the ALPHA® family of microprocessors from the Compaq Computer Corporation. -
Computer 100 includessystem memory 113, including read only memory (ROM) 114 and random access memory (RAM) 115, which is connected to theprocessor 112 by a system data/address bus 116.ROM 114 represents any device that is primarily read-only including electrically erasable programmable read-only memory (EEPROM), flash memory, etc.RAM 115 represents any random access memory such as Synchronous Dynamic Random Access Memory. - Within the
computer 100, input/output bus 118 is connected to the data/address bus 116 viabus controller 119. In one embodiment, input/output bus 118 is implemented as a standard Peripheral Component Interconnect (PCI) bus. Thebus controller 119 examines all signals from theprocessor 112 to route the signals to the appropriate bus. Signals between theprocessor 112 and thesystem memory 113 are merely passed through thebus controller 119. However, signals from theprocessor 112 intended for devices other thansystem memory 113 are routed onto the input/output bus 118. - Various devices are connected to the input/
output bus 118 includinghard disk drive 120,floppy drive 121 that is used to readfloppy disk 151, andoptical drive 122, such as a CD-ROM drive that is used to read anoptical disk 152. Thevideo display 124 or other kind of display device is connected to the input/output bus 118 via avideo adapter 125 and preferably is a high-resolution display suitable for viewing medical images.Computer 100 also includes amodem 129 and network interface 53 for communicating overnetwork 20 via either a wired or wireless connection. - A medical professional enter commands and information into the
computer 100 by using akeyboard 140 and/or pointing device, such as amouse 142, which are connected tobus 118 via input/output ports 128. Other types of pointing devices (not shown inFIG. 1 ) include track pads, track balls, joysticks, data gloves, head trackers, and other devices suitable for positioning a cursor on thevideo display 124. -
Software applications 136 and data are typically stored via one of the memory storage devices, which may include thehard disk 120,floppy disk 151, CD-ROM 152 and are copied to RAM 115 for execution.Operating system 135 executessoftware applications 136 and carries out instructions issued by the user. The Basic Input/Output System (BIOS) 117 for thecomputer 100 is stored inROM 114 and is loaded intoRAM 115 upon booting. BIOS 117 is a set of basic executable routines that help transfer information between the computing resources within thecomputer 100. - A number of embodiments have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. For example, blocks in the flowchart may be skipped or performed out of order and still produce desirable results. Accordingly, other embodiments are within the scope of the following claims.
Claims (24)
Priority Applications (2)
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US09/542,091 US7505614B1 (en) | 2000-04-03 | 2000-04-03 | Remote interpretation of medical images |
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Also Published As
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US7505614B1 (en) | 2009-03-17 |
JP2004500211A (en) | 2004-01-08 |
US20090290768A1 (en) | 2009-11-26 |
EP1287481A1 (en) | 2003-03-05 |
WO2001075776A1 (en) | 2001-10-11 |
AU2001249832A1 (en) | 2001-10-15 |
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