A physician is using ultrasound to make an image of a patient's heart. Increasing the frequency will provide A. Better penetration and better resolution.

B. Less penetration but better resolution.

C. More penetration but worse resolution.

D. Less penetration and worse resolution.

Ultrasound is absorbed in the body; this complicates the use of ultrasound to image tissues. The intensity of a beam of ultrasound decreases by a factor of 2 after traveling a distance of 40 wavelengths. Each additional travel of 40 wavelengths results in a decrease by another factor of 2 .