Answer #12

The correct answer is B: Absorption decreases with increasing depth.
Absorption actually increases exponentially with increasing depth so this statement is not correct.

Absorption is defined as the conversion of ultrasound energy into heat as it passes through a medium (Choice D) and this is the main cause of thermal bioeffects (Choice E). It occurs the most in dense tissues like bone and the least in tissues with water (Choice C). It also increases linearly with increasing frequency (Choice A)