Adaptive selection of image streaming mode

• US 7,996,495 B2
• Filed: 04/06/2006
• Issued: 08/09/2011
• Est. Priority Date: 04/06/2006
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Sherman, Alexander, Zaharia, Roni, Dekel, Shai
• Primary Examiner(s): Chan; Wing
• Assistant Examiner(s): Yi; David
• Application Number:
  US11/400,496
• Publication Number:
  US 20070237402A1
• Time in Patent Office: 1,951 Days
• Field of Search: 709/219, 382/128, 382/232, 382/276
• US Class Current: 709/219
• CPC Class Codes: G16H 30/20 for handling medical images, e.g. DICOM, HL7 or PACS
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: H04N 1/2166 for mass storage, e.g. in document filing systems information retrieval G06F16/00
• CPC Class Codes: H04N 1/33307 prior to start of transmission, input or output of the picture signal only
• CPC Class Codes: H04N 1/33353 according to the available bandwidth used for a single communication, e.g. the number of ISDN channels used
• CPC Class Codes: H04N 2201/0079 Medical imaging device
• CPC Class Codes: H04N 2201/33357 Compression mode

Abstract

A Picture Archiving and Communications System (PACS) transmits medical image information from a server to a viewing workstation. The mode of transmission that the system uses depends on a performance metric of the network. If the network is fast and stable, the entire DICOM image file is transmitted. If the network is not fast and stable, one of several other modes is used to transmit the image information.

Claims

1. An imaging system, comprising:

a server that stores medical image information and transmits the medical image information in a plurality of transmission modes, wherein one transmission mode is a native file format, and each of a remaining transmission modes of the plurality of transmission modes comprise a different compression technique;

a network adapted to transmit the medical image information from the server;

a viewing workstation operatively coupled with the network, the viewing workstation comprising a bandwidth measurement system that initiates a transfer of medical image information from the server to the viewing workstation by estimating an available bandwidth for the transfer of medical image information from the server to the viewing workstation;

wherein the viewing workstation receives the estimate of the available bandwidth from the bandwidth measurement system and selects a transmission mode from the plurality of transmission modes, the plurality of transmission modes organized in a hierarchy of transmission modes, each of the transmission modes of the plurality being associated with a threshold bandwidth value, and the viewing workstation selects the transmission mode from the plurality of transmission modes by comparing the estimate of the available bandwidth to a plurality of threshold bandwidth values;

wherein the viewing workstation requests transmission of the medical image information from the server and the viewing workstation requests the selected transmission mode for a transmission of the medical image information from the server;

wherein if the selected transmission mode is one of the remaining transmission modes, the server compresses the medical image information in accordance with the compression technique of the requested transmission mode, and transmits the medical image information to the viewing workstation.

2. An imaging system as in claim 1, wherein the plurality of transmission modes includes transmission of original image files, transmission of losslessly compressed image file data, transmission of region of interest pixel data, transmission of wavelet lossless compression image file data, and transmission of region of interest wavelet lossless compression data.

3. An imaging system as in claim 1, wherein the plurality of modes includes transmission of a lossy compressed version of image data in response to the server having pre-existing access to the lossy compressed version.

4. An imaging system as in claim 1, wherein the viewing workstation is configured to request transmission in said one of the plurality of modes responsive to performance characteristics of the viewing workstation relative to characteristics of the medical image information.

15. The system of claim 1, further comprising a plurality of servers that each store medical image information, each of the plurality of servers are communicatively connected to the viewing workstation by the network wherein the viewing workstation initiates a transfer of medical image information from a one server of the plurality of servers to the viewing workstation and the bandwidth measurement subsystem estimates an available bandwidth across the network between the one server and the viewing workstation, the viewing workstation requests the medical image information and the selected transmission mode for the transmission of medical image information from the one server to the viewing workstation.

16. The system of claim 15, wherein the estimated available bandwidth is between the viewing workstation and the one server independent from to an estimated bandwidth between the viewing workstation and each of the other servers of the plurality.

5. A method of transmitting medical image information within a picture archiving and communications system (PACS) including a server communicatively coupled to a viewing workstation via a communications network, the method comprising:

storing medical image information at the server;

initiating a transfer of medical image information from the server to the viewing workstation with the viewing workstation;

determining, an available bandwidth of the communications network, with a bandwidth measurement system, between the server and the viewing workstation;

establishing, with the viewing workstation, a hierarchy of transmission modes wherein each of the transmission modes in the hierarchy is associated with a threshold bandwidth value;

selecting, with the viewing workstation, a transmission mode from a plurality of transmission modes wherein one transmission mode of the plurality is a native file format and each of a remaining transmission modes of the plurality comprise a different compression technique, the selection of the transmission mode includes comparing the determined bandwidth of the communications network to a plurality of threshold bandwidth values;

requesting, from the viewing workstation to the server, the transfer of specified medical image information from the server to the viewing workstation;

requesting, from the viewing workstation to the server, the selected transmission mode for the transfer of the specified medical image information from the server to the viewing workstation; and

processing the medical image information with the server into the selected transmission mode;

transmitting the medical image information in the selected transmission mode from the server to the viewing workstation via the communications network.

6. A method as in claim 5, further comprising:

determining, with the server, a pre-processing capability of the server;

determining, with the viewing workstation, a post-processing capability of the viewing workstation;

providing the pre-processing capability of the server to the viewing workstation and wherein the viewing workstation determines the plurality of threshold bandwidth values based upon the pre-processing and post-processing capabilities each threshold bandwidth value of the plurality is associated with one of the plurality of transmission modes.

7. A method as in claim 6, wherein selecting includes the viewing workstation selecting a transmission mode associated with a highest threshold value met by the bandwidth.

8. The method of claim 5, wherein each of the transmission modes in the hierarchy is associated with a threshold bandwidth value, and the viewing workstation selects a transmission mode from the hierarchy that is associated with the highest threshold bandwidth value achieved by the determined bandwidth of the communications network.

9. The method of claim 7, further comprising continuously determining the bandwidth of the network wherein a change in the determined bandwidth of the network results in the viewing workstation selecting a different transmission mode of the plurality of transmission modes.

10. The method of claim 8, wherein the hierarchy of transmission modes comprises, in descending order, based upon the threshold bandwidth value:

transmission of original image files, transmission of losslessly compressed image file data, transmission of region of interest pixel data, transmission of wavelet lossless compression image data, transmission of region of interest wavelet lossless compression image data, transmission of lossy compression image data, and transmission of compressed region of interest image data.

11. The method of claim 5, further comprising:

requesting with the bandwidth measurement system a data stream of a fixed size from the server;

transmitting the data stream from the server to the bandwidth measurement system;

measuring a time with the bandwidth measurement system for the transmission of the data stream to the bandwidth measurement system;

wherein the bandwidth of the network is estimated based upon the measured time.

12. The method of claim 11, wherein the bandwidth measurement system requests the data stream of a fixed size from a different URL each time the bandwidth of the network is estimated further comprising a test URL with the bandwidth measurement system for the data stream, wherein the test URL is fetched to minimize the transmission of cached data.

13. The method of claim 12, wherein each possible URL for the data stream request contains pseudo-randomness.

14. The method of claim 5, further comprising:

determining with the viewing workstation, an identification of an image type of the medical image information; and

wherein the selection of the transmission mode is further based upon the identification of the image type.

17. The method of claim 5, wherein the PACS includes a plurality of servers communicatively coupled to the viewing workstation via the communications network, and

wherein determining the bandwidth of the communications network comprises determining the bandwidth of the communications network between the viewing workstation and a server of the plurality of servers and the viewing workstation requests the transfer of specified medical image information and the selected transmission mode to the server of the plurality of servers for the transmission of the specified medical image information from the server of the plurality of servers to the viewing workstation.