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DIGITAL IMAGE PROCESING

DIGITAL IMAGE PROCESING. 1960 NASA LUNAR AND PLANETARY EXPLORATION. ANALOG DIGITAL. ADC. APPLICATION OF DIGITAL IMAGING. ULTRASOUND DIGITAL RADIOGRAPHY NUCLEAR MEDICINE CT MRI. RADIOGRAPHY - PAST. TODAY. FLUOROSCOPY IN THE PAST CONVENTIONAL. DIGITAL FLUOROSCOPY.

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DIGITAL IMAGE PROCESING

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  1. DIGITAL IMAGE PROCESING

  2. 1960 NASA LUNAR AND PLANETARY EXPLORATION

  3. ANALOG DIGITAL ADC

  4. APPLICATION OF DIGITAL IMAGING • ULTRASOUND • DIGITAL RADIOGRAPHY • NUCLEAR MEDICINE • CT • MRI

  5. RADIOGRAPHY - PAST

  6. TODAY

  7. FLUOROSCOPY IN THE PASTCONVENTIONAL

  8. DIGITAL FLUOROSCOPY

  9. CASTELMAN (1996) CLASSIFICATION OF THE IMAGES BASED ON THEIR FORM OR METHOD OF FORMATION

  10. IMAGES • VISIBLE • OPTICAL • NONVISIBLE IMAGES • MATHEMATICAL

  11. ANALOG IMAGE CONTINUOUS IMAGES.

  12. ANALOG IMAGERADIOGRAPH- CONTINUOUS DISTRIBUTION OF LIGHT INTENSITY AS A FUNCTION OF POSITION ON THE RADIOGRAPH

  13. DIGITAL IMAGE NUMERIC REPRESENTATION OR IMAGES OF OBJECTS

  14. ANALOG TO DIGITAL ADC PROCESSING

  15. ANALOG vs DIGITAL

  16. DIGITAL TO ANALOG DAC

  17. ANALOG PROCESSINGINPUT AND OUTPUT IMAGES ARE BOTH ANALOG

  18. DIGITAL PROCESSINGINPUT AND OUTPUT IMAGES ARE BOTH DISCRETE

  19. IMAGE DIGITIZATION - ADC • SCANNING • SAMPLING • QUANTIZATION

  20. SAMPLING FREQUENCY

  21. LOW SAMPLING ALIASING ARTIFACT

  22. CT- SIGNAL FROM DETECTORS: ANALOG ANALOG

  23. MRI- SIGNAL FROM DETECTORS: ANALOG ANALOG

  24. PET- SIGNAL FROM DETECTORS: ANALOG ANALOG

  25. BASIC DATA AQUSITION SCHEME IN CT ADC

  26. DETECTORS SOLID STATE P.M. TUBE

  27. DETECTORS

  28. MATRIX - EYE OF THE BEE?!

  29. DIGITAL RADIOGRAPHY MATRIX

  30. IMAGE RECEPTOR MATRIX

  31. PIXEL RESOLUTION IN MATRIX4 x 4---16 PIXELS4 x 4 MATRIX

  32. MATRIX PIXEL WHAT MATRIX? 5 X 4 20 PIXELS

  33. HIGH vs LOW RESOLUTION

  34. SPATIAL RESOLUTION

  35. SPATIAL RESOLUTION SPATIAL RESOLUTION= FOV/ MATRIX

  36. NUCLEAR MEDICINE CT MRI DR CR 64 X 64 256 X 256 512 X 512 1024 X 1024 2048 X 2048 IMAGE MATRIX SIZES FOR DIFFERENT MODALITIES

  37. DYNAMIC RANGE: • THE RANGE OF VALUES OVER WHICH THE SYSTEM CAN RESPOND HOW MANY DIFFERENT SHADES CAN BE DISPLAYED IN THE PIXEL?

  38. 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 2 COLORS 4 COLORS 8 COLORS 16 COLORS 32 COLORS DYNAMIC RANGE 2 X BIT

  39. 1 BIT 2 BIT 5 BIT

  40. IMAGE MANIPULATION • WINDOWING • INVERSION • IMAGE SHARPENING

  41. WINDOW CENTER (LEVEL) CONTROLS: IMAGE DENSITY

  42. WINDOW WIDTH CONTROLS: IMAGE CONTRAST

  43. WINDOWING

  44. WINDOWING

  45. IMAGE INVERSION

  46. IMAGE SHARPENING

  47. RECENT ADVANCEMENTS

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