The use of high-frequency sound waves to record echoes on an oscilloscope and film is:
A)electroencephalography.
B)myelogram.
C)ultrasonography.
D)positron emission tomography.

Question

Quizplus · Accepted Answer

The use of high-frequency sound waves to record echoes on an oscilloscope and film is known as ultrasonography. Electroencephalography measures electrical activity in the brain, myelogram involves the injection of contrast dye into the spinal canal to view the spinal cord and nerves, and positron emission tomography uses a radioactive tracer to create images of body function.

The Use of High-Frequency Sound Waves to Record Echoes on an Oscilloscope