DICOMweb Support for Retrieval via ZIP: Enhancing Data Accessibility
"Explore the benefits of using ZIP format for DICOMweb retrieval, supported by Bill Wallace. Learn about ZIP advantages, changes, exclusions, examples, and how it enhances accessibility to DICOMweb services, meeting various needs efficiently."
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Overview: DICOMweb support for retrieval via ZIP Bill Wallace Co-Chair of WG-27: DICOMweb
Contents Background Changes Overview Exclusions Example Study Retrieve ZIP Example Study Metadata Retrieve ZIP WG-27 DICOMweb 2
Background Multipart mime is poorly supported Not native to browser Few tools in OS Developer libraries are hard to use Very common for email only Need well supported file archive format ZIP supported natively in Windows ZIP supported natively in Java for developer use Libraries easy to use for others ZIP is a streaming format ZIP has a directory to allow finding files quickly WG-27 DICOMweb 3
Changes Overview Added ZIP Payload Analogous to Multipart payload Same sort of choices for Transfer Syntax specification etc BulkData URIs to items in ZIP are relative path URI eg. ./image0-bulkdata3.raw Contains either metadata + Bulkdata, or just metadata Accessed over existing WADO-RS retrieves Defined file extensions for contents Added File Meta Information to XML/JSON WG-27 DICOMweb 4
Exclusions Other archive formats not defined Inclusion of data other than DICOM metadata and Bulkdata Encryption of archive (except transport encryption) Layout of ZIP, other than linkage between Bulkdata URI and Bulkdata file WG-27 DICOMweb 5
Example Study Retrieve URL is just like multipart/related retrieve: http://localhost/wado/studies/1.2.3/instances?accept=applic ation/zip;type= application/dicom+xml The study structure might be: Studies/series0/image0.xml Containing a Bulkdata URI reference image0- Bulkdata/00100020.raw Studies/series0/image0-Bulkdata/00100020.raw Studies/ (rest of study) WG-27 DICOMweb 6
Example Study Metadata Retrieve URL is just like multipart/related retrieve: http://localhost/wado/studies/1.2.3/metadata?accept=applic ation/zip;type= application/dicom+xml The study structure might be: 1.2.3/3.4.5/6.7.xml Containing a Bulkdata HTTP URI http://localhost/wado/studies/1.2.3/series/3.4.5/Bulkdata/6. 7/00100020.raw The ZIP file will NOT contain any Bulkdata files 1.2.3/ (rest of study) WG-27 DICOMweb 7
Conclusions The ZIP Payload retrieve will allow more users and systems to easily access the DICOMweb services Meets the goals of the web services providing extended, easy access to data Standardizes what is already done in many implementations of DICOMweb WG-27 DICOMweb 8
