ABSTRACT
Which of the following statements about diagnostic ultrasonography is INCORRECT?
At lower ultrasound frequencies, there is better penetration but worse resolution.
At higher ultrasound frequencies, there is worse penetration but better resolution.
Acoustic impedance influences the amount of energy reflected from tissue interfaces.
Diagnostic medical ultrasound frequencies are typically between 2 and 18 KHz, which is above the audible range of normal human hearing.
Fat appears echo-bright on ultrasound.
