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What’s New in DICOM – it’s been a very busy year!

What’s New in DICOM – it’s been a very busy year!. Robert Horn, Agfa Healthcare Harry Solomon, GE Medical Systems RSNA 2003. Multi-frame MR/CT. Enhanced MR Image, MR Spectroscopy, CT Image More rigorous attribute definition (less need for private data elements)

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What’s New in DICOM – it’s been a very busy year!

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  1. What’s New in DICOM –it’s been a very busy year! Robert Horn, Agfa HealthcareHarry Solomon, GE Medical Systems RSNA 2003

  2. Multi-frame MR/CT • Enhanced MR Image, MR Spectroscopy, CT Image • More rigorous attribute definition (less need for private data elements) • Multi-frame object to support 1000+ image studies • Dynamic image header supports attributes changing during acquisition • Dimensions allow multiple views of data • Functional imaging with color and real-world value mapping • File size flexibility through concatenations • MR in 2003 Standard, CT in Ballot

  3. Chinese / Unicode • Official DICOM support for Unicode and GB18030 (PRC standard) • GB 18030 character set is harmonized with Unicode • Objects in Unicode do not need character set switching (and there is no mechanism for it) • Japanese uses JIS X 0208/0212 Katakana/Kanji, Korean uses KS X 1001 Hangul/Hanja, in accordance with national policies • W. Europe has installed base of IR-100 (Latin 1), but no formal impediment to using Unicode

  4. DVD / JPEG2000 • JPEG2000 is now an official compression method under DICOM • Wavelet based, up to 16-bit pixel depth • Lossless and lossy • DVD is now an official exchange medium under DICOM • Can use any DVD flavor (-R, -RW, +R, +RW, -ROM) • Reader must support JPEG or JPEG2000 lossy compression

  5. More and More SR Templates • Done: • Ob-Gyn, Vascular, and Cardiac Ultrasound • Cath Lab Procedure Log, Hemodynamics, and Final Report • Breast Imaging Report • In Process: • Fetal/Pediatric Echocardiography • Intravascular Ultrasound • Quantitative Arteriography and Ventriculography • CT/MR Angiography

  6. Conformance • Major enhancement to Part 2 Conformance based on experience using Conformance Statements to prepare for and troubleshoot DICOM installations • 1 page Executive Summary • Documentation details for behavior at the attribute level • New sections on error handling, coded terminology, security • Example Conformance Statements reflecting real types of systems • Modality with MWL, MPPS, GSPS, Print w/P-LUT, and Storage Commitment • RIS as MWL and MPPS Service Class Provider • Multi-modality Workstation, including Media Exchange • Print Server • Archive

  7. Configuration Management • Introduces use of LDAP with a standard LDAP schema to maintain configuration parameters of DICOM devices • LDAP query to retrieve configuration from LDAP server • Device obtains its own parameters, and those of communication partners (addresses, capabilities) • Also uses DHCP, DNS, and NTP to cover: • Installation and auto-configuration of a new device • Portable, mobile devices • Mixed networks with legacy equipment • Synchronized time across devices • Objective to decrease service cost while maintaining reliable standard-based configuration management • Currently Frozen for Trial Use, Ballot 1Q2004

  8. Web Access to Images • Web Access to DICOM Persistent Objects (WADO) • Joint project of DICOM and ISO • Standard HTTP URL to web image server • Images returned as vanilla JPEG, or as MIME-encapsulated DICOM • Can request entire image, or just ROI • Currently in Ballot

  9. Image Registration • Composite Objects that support multi-image alignment • Transform based • Matrix operation to map one Frame of Reference to another • Frame of Reference may be synthetic (e.g., Talairach Brain Atlas) • Fiducial based • Fiducial points identified in image, or in 3-D Frame of Reference space • May be used with projection images • Facilitates further image processing, especially multi-modality image fusion and image pasting applications • Ballot closed December 2, 2003

  10. Relevant Patient Info Query • Address need for more detailed patient clinical history affecting image acquisition or interpretation • Risk factors, chronic diseases • Detailed allergies, medical problems • Prior findings for follow-up exam • DICOM mechanism to obtain extended patient info • Query (C-FIND) message model • Patient ID is Query Key • Query Response has patient info in Structured Report format • Specific and general queries • Breast imaging, cardiac, general • Ballot closed December 2, 2003

  11. Image-based Specialties • New work under way in Ophthamology (WG-9) • Ophthalmic Photography (fundoscopy,fluorescein angiography) • New working group for Dentistry (WG-22) • Media exchange on CD • New work under way in Endoscopy (WG-13) • Visible Light Video (endoscopy, microscopy, photography) • MPEG video image encoding in DICOM

  12. Coming soon • Hanging protocols • Radiotherapy workflow • Non-radiology workflow • Advanced X-ray angiography • Advanced ultrasound • 3-D and n-D • Media creation service (CD burner) • Color consistency • Parts 3, 6, and 16 tables published in XML

  13. http://dicom.nema.org • DICOM home page now includes presentations and tutorials • Especially new MR IOD and Structured Reporting

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