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Medical Image Display

Explore the fundamental aspects and advanced technologies of medical image display, impacting decisions crucial for patient care. Learn about perception issues, standards, calibration, and enhancement techniques to ensure consistent and accurate image representation across different display systems. Discover novel display technologies and strategies for optimizing user interactions to enhance diagnostic capabilities and treatment effectiveness.

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Medical Image Display

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  1. Medical Image Display Bradley Hemminger School of Information and Library Science Department of Radiology, University of North Carolina, Chapel Hill http://ils.unc.edu/bmh bmh@ils.unc.edu

  2. Medical Image Display • Digital Values + Human Observer • Observer makes decisions • Decisions affect patient care/treatment • Results in different patient outcomes.

  3. Basic Perception Issues • Color or Grey Scale to Use? • Standardizing the Grey Scale • Perceptual Linearization • Different types of Displays (CRT, flat panel) • Calibration

  4. PACS: multiple sources and destinations: LAN

  5. Consistent Grayscale: Acquire Display Print Slide courtesy of David Clunie, ComView

  6. Image Presentation Integrity • Goal: Images look the same independent of the display system or method used to present the images. • DICOM Standards supporting this: • - Grayscale Standard Display Function • - Softcopy Presentation State Storage • AAPM guidelines • - Display Quality for Electronic Displays

  7. Display Display Modality Perceptual Linearization Ambient Light Perception of Contrast By Human Visual System

  8. Display Card Values (0-255, 0-1023) Laser Printer Values (0-255, 0-4095) Display Card Computer Analog Voltage Luminance on Monitor or through film on Lightbox Computer Digital Values (0-255, 0-4095, ... 0-65535) Perceived Brightness by human observer

  9. Computer Characteristic Curve Display Card CSF Contrast Sensitivity Function (CSF) Transfer function describing the change in luminance required to see a contrast threshold at a given luminance level.

  10. Image Display and Interaction • Single Images • Alternators • Hanging Protocols • Staged Interactions (Mammo Screening) • Studying Users to optimize CHI.

  11. Image Enhancement • Intensity Windowing • Unsharp Masking • AHE • MUSICA

  12. Novel Display technologies • Cine/stack • “3D” • Virtual reality • Fusion

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