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Trends In Medical Displays - Planar Systems - Adi Abileah

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Trends In Medical Displays …

Trends In Medical Displays
Presented by Adi Abileah
Chief Scientist, Planar Systems

FPD China
March 10-12, 2008

Published in Technology , Health & Medicine
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  • 1. Trends in Medical Displays Adi Abileah Chief Scientist, Technology Group Beaverton, OR, USA
  • 2. Outline
    • Trends in Medical Imaging
    • Types of Medical Displays
    • AMLCD Challenges for D.I.
    • Future hospitals and Displays
    • New DI and 3D Displays
    • Summary
  • 3. Trends in Medical Imaging Trend Display Imaging PACS Archiving
  • 4. Trends in Medical imaging MR MR CT NM US US Digital Computer CT
  • 5. Imaging Modalities XR – X-Ray ( CR, DR ) CT – Computer Tomography Fluoroscopy MR – Magnetic Resonance NM – Nuclear Medicine PET – Positron Emission Tomography SPECT – Single Photon Emission Computer Tomography US – Ultra Sound Using tomography (3D slices) Mammography X-ray Magnet Isotopes Ultra Sound Type of radiation used
  • 6. Evolution of X-ray DR-Digital Radiography CR-Computerized Rad. XR (X-Ray) CT, MR, NM, PET, US, FL, Mammo, PACS Archive PACS Work station DIGITAL DIGITAL DR, CR FILM
  • 7. Evolution of X-ray DR-Digital Radiography CR-Computerized Rad. XR (X-Ray) CT, MR, NM, PET, US, FL, Mammo, PACS Archive PACS Work station DIGITAL DIGITAL DR, CR
  • 8. Medical Sensor Resolution and Grayscale Depth
  • 9. Medical Sensor Resolution and Grayscale Depth
  • 10. Displays - Sensors matching CT MR CR, DR Mammo NM US Which Display? Mono , or C o l o r ?
  • 11. DISPLAY Resolution / Grayscale Today
  • 12. DISPLAY Resolution / Grayscale Soon
  • 13. DISPLAY Resolution / Grayscale Future
  • 14. Outline
    • Trends in Medical Imaging
    • Types of Medical Displays
    • AMLCD Challenges for D.I.
    • Future hospitals and Displays
    • New DI and 3D Displays
    • Summary
  • 15. Types of Medical Displays
    • 1. Embedded Displays
    • (Instruments)
    • Example – EL 
    • EL = Electro-Luminescence
    • Rigid,
    • Wide temperature
    TFEL  ( C o l o r )
  • 16. Types of Medical Displays
    • 2. Referral Displays
    • (Informative)
    • Example – AMLCD 
    • AMLCD = Active Matrix Liquid Crystal Display
    • Information,
    • Instrument signals,
    • Referral images
  • 17. Typical Informative displays Medical Monitors Documentation Class Systems Diagnostic class Point of Care
  • 18.
    • 3. Diagnostic Displays (Imaging)
    • High resolution AMLCDs (Close to film) Calibrated gray levels (DICOM – see below) Meet Film Quality
    Imaging (Diagnostic) Displays
  • 19. DUAL Diagnostic Medical Displays Most radiologist prefer 2 x (3 MP) displays
  • 20. Outline
    • Trends in Medical Imaging
    • Types of Medical Displays
    • AMLCD Challenges for D.I. (Digital Imaging)
    • Future hospitals and Displays
    • New DI and 3D Displays
    • Summary
  • 21. Medical Imaging Displays should have:
    • Very high resolution (130 DPI, ~190 μm pixels)
    • High Brightness (~300 cd/m2; >500 mono)
    • At Least 10 bits (1024) separable gray levels
    • DICOM GSDF gray levels
    • Good Viewing angles (CR (+/- 85  H,V) >> 10:1; Little loss of gray levels; No inversion)
  • 22. Transition to AMLCDs
    • What makes the AMLCDs compete with CRTs as the displays for digital imaging?
    ?
  • 23. AMLCDs are the Dominant Technology Laptops Desktops LCD-TV Medical displays Manufacturing infrastructure Market trend
  • 24. Improved resolution Exponential Trend…! Medical Diagnostic
  • 25. Improved Viewing Angles IPS, FFS, MVA, PVA – Liquid Crystal (LC) technologies
  • 26. DICOM Standard
    • Standard for:
      • Communication
      • Archiving
      • Displays
    • DICOM –
      • D igital I maging and Co mmunication in M edicine
    http://medical.nema.org/
  • 27. Meeting The Gray Levels Criteria
    • Medical displays must support high # of gray levels
  • 28.  
  • 29. DICOM - Gray Scale Display Function http://medical.nema.org/dicom/2003.html DICOM GSDF
  • 30. DICOM Gray Levels Calibration
  • 31. Reasons for DICOM Calibration
    • Have same image over time
    • Same image in different locations ( e.g. Beijing and Shanghai )
    • Differentiate image details
    2001 2006
  • 32. Planar’s Method to Achieve More Gray Levels Display Driver Chips – 8 bits Sub-pixels Dithering – 1.5 bits Temporal Dithering – 2 bits Total = 11.5 bits Planar: 11.5bits /3061 gray levels Sub-pixels
  • 33. Meeting DICOM Standard Gray levels A ccuracy Brightness Control LUT – Look up tables (> 10 bits) - stable Backlight Sensor (center) Better Front Sensor (corner) Need adjustment
  • 34. Driving The Displays Sensor 12 bits
    • CPU
    • Image Buffer
    • Compression
    • Image Proc.
    8 bits
    • Graphic Card
    • Memory
    • Video Conversion
    DVI
    • Display
    • De-Compression
    • Calibration - (LUT)
    11.5 bits
    • AMLCD glass
    • Row / Column drivers
  • 35. Grey Level Brightness vs Horizontal Viewing Angle IPS
  • 36. Normalized Gray Level Each curve at different viewing angle; NO INVERSION
  • 37. Meeting Medical Standards (*) - Mandatory AAPM-TG18 DIN-6868 -57 EUREF JIS-Z4752-2 USA, Americas, R.O.W. Germany (*) , Switzerland, Austria Europe (EC) Japan
  • 38. Planar’s architecture is already 12 bits
    • We use our own display controller
    • It is tightly coupled with our display
    • The limitation is the operating system (Windows) – Changing to new soon ( 2007 )
    • PACS viewer software is also 8 bits
  • 39.  
  • 40.  
  • 41. Medical Displays - Summary
    • Unique displays
    • Diagnostic workstations need bright, high resolution and high gray levels
    • Trend: Color Diagnostic displays
    • Soon launching 2, 3, 4 MP color DICOM calibrated , 1768 shades of gray
  • 42. Outline
    • Trends in Medical Imaging
    • Types of Medical Displays
    • AMLCD Challenges for D.I.
    • Future hospitals and Displays
    • New DI and 3D Displays
    • Summary
  • 43. Future UCLA medical center (2005)
  • 44. Imaging Work Station – Center Location
    • High Resolution Displays (x2)
    • Low Ambient illumination (no glare)
    • Color monitor
  • 45. Departments User Information Access
  • 46. Infotainment = Information + Entertainment Patient medical Info TV, Web, Emails Secure Paid
  • 47. Hospital Staff Want Mobility and Connectivity Wireless (Secure) This is evolving technology Patient Information Pharmacy Physician Ref. book Schedules & Emails Images
  • 48. Future Operating Room (OR) Presented by Dr. Falk at the UCLA-2004 conference
  • 49. Displays Trend Map Embedded Displays (EL, LCD) Referral (1~2 MP) Desktops, Carts, Vital Screen, Digital Imaging (3, 5, 16 MP), Carts, Mammography, OR- Multi-function Video, ~20”, split screen, touch, washable, OR- Wall Displays >30”, Plasma, AMLCDs Observation Suite >30”, Video Infotainment ~19”, Video, referral, web 3D-stereo High resolution,
  • 50. Outline
    • Trends in Medical Imaging
    • Types of Medical Displays
    • AMLCD Challenges for D.I.
    • Future hospitals and Displays
    • New DI and 3D Displays
    • Summary
  • 51. Typical Displays for DI – Digital Imaging
    • Typical Medical displays for Digital Imaging: 2, 3, 5 MP – monochrome & Color
    • Dimensions: 20 ~ 21 inch diameter
    • Mostly used: pair of 3 MP (mono)
    • Last two years: 4 MP color / 30” – for two side by side images (2x 2MP)
    2 MP 3 MP 5 MP 4 MP / 30”
  • 52. New products (at RSNA-2007)
    • Planar-Dome: 16 MP mono / 30” (200 dpi)–
      • For: mammography, radiology, multi-modalities
      • production coming soon
    • Barco: 6.7 MP color / 30” (127 dpi)–
      • For: Radiology (2x 3MP images), multi-modalities
      • made by Hitachi (s-IPS)
    • Planar-Dome: Stereo-3D SD2320:
      • For: CT, MR, other volume imaging (3Mensio software)
      • For: surgery planning, and education
    • Planar-Dome: Stereo-3D prototype:
      • Mammography study at Emory Hospital
  • 53. 3D Stereo –Planar products
    • Improves detection of 3D images
    • Clinical trials of mammography
  • 54. Stereo-Mirror (3D) - Concept
  • 55. RSNA Show – Stereo Displays (3D) CT images Processed w. 3Mensio Software Planar - - SD2320 3D display Mammo Study at Emory U. Planar - - prototype 5MP-stereo
  • 56. Stereo-5 MP – Mammography study
    • Study in progress
    • For 1093 patients – improve false-positive by 49%
    Study at Emory Univ. Breast Clinic, Atlanta, GA 5 MPixel Stereo prototype
  • 57. Summary
    • HealthCare system is evolving
    • Modalities are using high end displays
    • AMLCDs are becoming the dominant display technology
    • AMLCDs have still some challenges
    • New displays are coming:
      • PDAs, or Tablet-PC (wireless),
      • video displays (multifunction),
      • large screens,
      • high resolution with internet access,
      • 3D (rendering) and stereo-3D
  • 58.
    • THANK YOU
    [email_address] Web: www.planar.com