2022-01-31.md

2022-01-31

Agenda

• DICOM Lookup tables

  • What do they mean? VOI LUT, Modality LUT, Presentation LUT
  • Sometimes they toggle on/off
  • Table transform from source pixel values into whatever you want to display
  • e.g. for an unsigned CT raw pixel into hounsfield
    • 0->-1024
    • 1024->0
    • 2048->1024
  • Four Types
    • Modality LUT - Transform between raw values (x7fe0,0010) and something more standardized (e.g. CT HU).
      • Rescale Slope/Intercept is a linear transform
    • VOI LUT - Values of interest (e.g. WW/WC - bone, abdomen, lung, brain)
    • Presentation LUT - Converts rest of values into something display can show
      • e.g. MONOCHROME1 (white->black) - can invert
      • It is sometimes implicit, explicit (invert), full LUT
    • Color LUT - maps input as single value to RGB
  • https://dicom.nema.org/medical/dicom/current/output/chtml/part04/figures/PS3.4_N.2-1.svg
  • https://github.com/cornerstonejs/cornerstone/blob/master/src/internal/generateLut.js
  • https://github.com/PantelisGeorgiadis/dcmjs-imaging

• Multimedia Report

  • Came up with a clinical use case

• static-wado and p10 update - 5m

  • Java and JS version are child projects of OHIF
  • Lots of enhancements made
    • Change to the structure of the output so they can be served by OHIF
      • OHIF testing can use the output of dicom-static-web

• HELP WANTED - Looking for additional test data:

  • ECG
  • PDF
  • Video (short) - can someone do a 1 minute intro to OHIF as MPEG

• SIIM Blockchain Working Group - 5m

  • SIIM Hackathon related - eduction focused than competitive
  • Try to keep it interesting by adding new technology
    • Want to make them highly accessible - demystify
  • Two new initiatives this year
    • Open Source Data Set - FHIR + DICOM (fictional patients)
      • In the process of adding "enterprise imaging type data" to those images
      • In the past - just radiology. Working on adding dermatology, pathology, etc
    • Blockchain
      • Spun off a working group to figure out how to do this
      • First meeting was last week
      • Decided to create a SIIM specific Ethereum network
      • Will have a few sample applications
        • Use Case: Verify Radiologist Credentials
        • Use Case: Verify codvid vaccination certificates
      • Will also have option for people to devlop their own apps and explore other uses cases
  • Reach out to Mohannad if you are interested in helping out!