SOFTWARE PROJECT MANAGEMENT
QUALITY MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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kV affect the x-ray beam quality
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kV affect the patient exposure
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kV affect the motion artifact
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kV affect the contrast density of film
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Detailed explanation-1: -Greater radiographic density may be produced by increasing (1) the total number of x-rays that reach the film, (2) the penetrating power of the x-rays, (3) the developing time, or (4) the temperature of the developer. (Film development is discussed in Chapter 7.)
Detailed explanation-2: -The low kV image has superior contrast because of reduced levels of scatter. As the kV is reduced, the average photon energy is reduced; accordingly, the proportion of photoelectric interactions increases and the proportion of scatter events is reduced.
Detailed explanation-3: -A higher kVp will make the x-ray beam more penetrating. It will also result in less difference in attenuation between the different parts of the subject, leading to lower contrast.