Skip to content

Latest commit

 

History

History
44 lines (38 loc) · 2.45 KB

2023-10-02.md

File metadata and controls

44 lines (38 loc) · 2.45 KB
Raw

2023-10-02

Agenda

  • Photometric Interpretation and compressed transfer syntaxes

    • Uncompressed image with YBR_422 photometric interpretation and wanted to compress with HTJ2K
    • Cornerstone library assumes that color images after decompression are in RGB encoding
    • What is the correct way to do this for compressed transfer syntaxes?
      • are you supposed to convert other photometric interpretations into RGB before compressing?
    • In DICOM - the image compression header trumps the DICOM attributes
      • Rows, Columns, Pixel Layout, Bits Allocated, Bits Stored, Signed/Unsigned
    • When decoding JPEG2000/HTJ2K - you should check to see if a color transform was employed and if so - convert it to RGB for display
    • When encoding to JPEG2000/HTJ2K you should check the source photometric interpretation and if YBR, apply color transform flag to avoid losing data precision
    • TODO: File bug in CornerstoneJS to fix this behavior
    • TODO: Audit the other transfer syntaxes for color transform support
    • TODO: Look into existing blogs on this? Talk to David Clunie

  • Latest thinking on DICOM Anonymization

    • Expereinces that people can share?
    • Has the trend moved more towards storing PHI in the cloud?
      • high percentage >80% of new vna/pacs projects are cloud
    • What anonymization takes place on premise side
    • Using off the shelf software? Building it themselves?
    • Metadata and Pixel Data
    • Any experience with anonymization and LLMs in the cloud
    • Univ. Misourri Columbia
      • Want you to work in their "air gapped" area
      • Has a long wait list - may be 2 years before you get access
    • MIT is very open - just need to go through their training course then you get access for 3 years
      • MIMIC - EMR data only
    • PACSBIN
      • Everything de-identified before uploaded to cloud
      • Each instituion has its its own process for approving de-identification of data
      • Half (?) run their data through PACS BIN default anonymizer and verify
      • Other half have more strict internal process where they have to do the de-identification first, dumped into preprocessed bucked, then can query the bucket
    • Do customers use the DICOM De-identification profiles?
      • not very often
    • What about HIPAA safe harbor?
      • Some? DICOM de-identification profiles are compliant with this
    • Some organizations require that you sign a document that you won't try to re-identify the patient
    • Some orgqnizations will ask you to sign a BAA just "in case"