Question

How are ultrasound waves produced by the source and transmitted through the body tissues to the receiver when ultrasound is used to study an unborn baby?

a) The source generates high-frequency sound waves through vibrations, which travel through the body tissues to the receiver.

b) The source produces electromagnetic waves that are absorbed by the body tissues and detected by the receiver.

c) The source emits visible light waves that are reflected off the body tissues and received by the receiver.

d) The source releases ultrasound waves that travel at the speed of light through the body tissues to reach the receiver.

Answer 1

Ultrasound in fetal imaging works by a transducer emitting high-frequency sound waves that go through the body, reflect off tissue boundaries, and return to the transducer to create an image.

Step-by-step explanation:

When ultrasound is used to study an unborn baby, the process involves a source, such as a transducer, which generates high-frequency sound waves through vibrations. These ultrasonic waves are emitted by the transducer into the body tissues. The waves encounter different tissue densities and boundaries, such as those between muscle and bone, causing part of the waves to be reflected back to the transducer, which also serves as the receiver. The reflected waves are then detected, and a computer constructs an image that reveals the shape and density of internal structures like the fetus.

Thus, the correct answer to how ultrasound waves are produced and transmitted through body tissues during a fetal ultrasound is: a) The source generates high-frequency sound waves through vibrations, which travel through the body tissues to the receiver, with part of these waves being reflected back and processed to create an image.