Unit 3 Fluoroscopy

  1. ____ - Device that uses a continuous X-ray beam to create a live image. 
    Invented by ____ ____ in ___.
    • Fluoroscope
    • Thomas Edison, 1896
  2. ____ ____ - converting exit radiation into visible light of high intensity to project anatomy on a TV monitor.

    Developed in ___.
    • Image Intensification
    • 1948
  3. ___ ___: 20-1,200 mA
    ___ ___: 0.5-5.0 mA
    • Diagnostic tubes
    • Fluoroscopic tubes
  4. 4 parts of Image Intensification Tube
    ____ ____ - surrounds electrical components
                    - Air removed; vacuum created

    ____ ____ - contains input screen (phosphor) & photocathode

    ____ ____
    ____ ____ - contains output screen (phosphor) & anode
    • Glass Envelope 
    • Photocathode End (-)
    • Electrostatic Lenses
    • Anode End (+)
  5. ___ ___ converts X-ray energy into light
    - Exit radiation from patient strikes the input screen; phosphors emit light in proportion to photons absorbed.
    ——- Made of ___ ___ ___ coated on concave surface of tube
    • Input screen
    • Cesium iodide phosphors
  6. _____ converts light into electrons:
    - Light from the input screen strikes photocathode; emits electrons in response (_____)
    ——- Made of a thin layer of cesium & antimony compounds (metals)
    • Photocathode
    • photoemission
  7. Image Upload 1
    • Focal Point
    • 1. Focal Point
    • 2. Electrostatic Focusing Lenses
  8. Image Upload 2
    • Anode
    • Output Screen
    • zinc-cadmium sulfide phosphor
  9. Image Upload 3
    • Increases
    • focal point
    • 1.5-4
  10. Image Upload 4
    • Total Brightness Gain
    • 10%
  11. Calculating Brightness Gain
    Brightness Gain = ______ x ______
    Brightness Gain = minification gain x flux gain
  12. Image Upload 5
    Automatic Brightness Control (ABC)
  13. Image Upload 6
    • Charge-coupled device (CCD)
    • Light, electrons emitted
  14. Image Upload 7
    • Pulse progressive mode 
    • Interrogation
    • Extinction
  15. Image Upload 8
    • Image intensification tube
    • 5 million
    • distortion
    • DQE
  16. Image Upload 9
  17. Image Upload 10
    • Contrast
    • Quantum Mottle
  18. Image Upload 11
    • Resolution
    • Distortion
Author
Marc817
ID
348664
Card Set
Unit 3 Fluoroscopy
Description
Unit 3 Fluoroscopy
Updated