In fluoroscopy, shape distortion is caused by
A) angling the x-ray tube
B) angling the image intensifier in the fluoroscopic tower
C) inaccurate control or focusing of the electrons released at the periphery of the photocathode, and the curved shape of the photocathode
D) inaccurate control or focusing of the electrons released at the periphery of the photocathode, and the flat shape of the photocathode
Correct Answer:
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Q10: This part of the image intensifier absorbs
Q17: If a 30/23/15 cm image intensifier is
Q19: The original fluoroscopic image was very
A) dim
B)
Q21: The function of the fluoroscopic unit that
Q22: _ is measured in cd/m2/mR/s.
A) Brightness gain
B)
Q23: The formula to determine the amount of
Q26: If the input phosphor measures 30 cm
Q27: A loss of brightness around the edge
Q28: The formula for brightness gain is
A) brightness
Q29: Typical fluoroscopic systems have spatial resolution capabilities
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