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Chap 5 Flat-panel DR Quiz

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1. the ability of the imaging system to resolve fine details present in an object is called




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2. General operating principles/steps of indirect TFT?




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3. Flat panel TFT: What is the matrix or active matrix array-whats it consist of?




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4. X-ray scintillators are what for indirect flat panel TFTs?




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5. Dynamic range of a digital detector is what




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6. Third step in image processing is ___________, where the adjusted or scaled raw data values are mapped to the "for presentation" values to display an optimum image.




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7. Fill factor is what?




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8. Detectors with ____ fill factors (____ sensing areas) will provide better spatial and contrast resolution.




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9. Before the flat panel detector can be used, it must be prepared. This is referred to as __________.




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10. 4 limitations of CR:




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11. fine details, contrast.




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12. "for processing" image.




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13. the exposure falling on the detector.




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14. The charge pattern from the readout of pixels (from the light of the scintillator falling on each pixel that produced electron-hole pairs...) is sent to the ADC for digitization. Then sent to computer for processing.




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15. After X-ray exposure, latent image is formed, Laser beam extracts image information signal, Signal is digitized and sent to a computer for preprocessing.




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16. photodiode, storage capacitor.




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17. imaging the chest




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18. x-ray absorber, scintillator, light optics, the CCD. (which is a sensor chip.. or many...)




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19. as a percentage. (Fill factor of 80% means that 20% of the pixel area is occupied by the detector electronics and 80% is sensing area)




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20. indirect, CCD chip





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