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Fig. 3 —71-year-old man. Effect of tube voltage on bone presentation.
Spongy bone contrast is slightly better with voltage of 80 kV, although noise
in soft tissue is definitely greater. Contrast and noise do not significantly
differ between 120 and 140 kV. Because quality of bone presentation does not
decrease to less than diagnostic quality with smaller voltage, this effect
should be exploited to reduce radiation dosage.
