The geometric sharpness of an image is affected by____.
A. focal spot. A large focal spot is easy to obtain good radiographic definition
B. source object distance (SOD). A large SOD is easy to blur image.
C. object film distance (OFD). A large OFD is easy to make image blur.
D. none of the above.
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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.
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
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