About the “Line Focus Principle”, which of the following statement is correct?
A. The effective/nominal focal area is smaller than actual focal area.
B. The effective/nominal focal area determines the tube rating.
C. The effective/nominal focal area is independent on the anode angle.
D. The effective/nominal focus is modelled as a round shape.
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Which of the following two factors affect both quantity and quality of X-ray radiation?
A. mAs, kVp.
B. kVp, exposure distance to subject.
C. Exposure distance to subject, filtration.
D. kVp, filtration.
Which of the following characterization doesn't belong to the component of X-ray tabletop?
A. radiolucent - permit x-rays to pass through
B. fixed - allow tilting up or down
C. Effective - especially when positioning large patients
D. Hard - easily cleaned difficult to scratch
Spotfilm device normally contains the following items except_____.
A. cassette carriage
B. X-ray source
C. Ionization chamber
D. image intensifier
About the movement restriction, which of the following is not correct?
A. Oblique projection is possible with undertable units.
B. A room height of three meters is proved optimal for installing examination unit.
C. There must leave at least 50cm space between wall and table top.
D. The movement of table must stop when the tube or table top is no more than 12cm away from the ceiling.
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