21-25
26-30
31-35
36-40
100

What is the propagation speed of a 5 MHz sound wave traveling through soft tissue?

1,540 mm/sec

100

What term defines the total number of cycles multiplied by the sound's wavelength?

Spatial pulse length

100

What units best describe duty factor?

Watts

Time

Distance

None of the above

None of the above

100

What is the period of the sound wave over a time span of 1 μsec? (Image)

0.25 microseconds

200

Watts are units that represent:

Power
200
The typical range of frequency for diagnostic ultrasound imaging is:

2 to 15 MHz

200

The wavelength of an ultrasonic wave is determined by:

Both sound source and medium

200

What is the wavelength of a 9 MHz sound wave in soft tissue?

0.17 mm

300

Which of the following best describes the pulse duration?

Period multiplied by the number of cycles in the pulse

PRF multiplied by wavelength

Frequency multiplied by wavelength

Duty factor multiplied by the pulse repetition period

Period multiplied by the number of cycles in the pulse

300

Which of the following medium's propagation speeds is in the correct increasing order from slowest to fastest?

Air, water, metal

300

Four waves have pulse repetition periods as listed below. Which of the following waves has the lowest pulse repetition frequency?

10 μs

8,000 ns

100 ms

10 s

10 s

300

While using the same ultrasound machine and transducer, a sonographer can alter all of the following terms except?

Pulse repetition period

Duty factor

Pulse duration

PRF

Pulse duration

400

The three acoustic parameters: pressure, density, and distance, are possible units for which sound wave parameter?

Amplitude

400

In the soft tissue, what is the propagation speed of a sound wave with a frequency of 6 Hz?

1,540 m/s

400
What unit of measurement is used to describe amplitude?

Decibels

400

Which of the following terms best describe the Letter C? (Image)

Pulse repetition period

500

Compare two sound waves: A and B. The frequency of wave A is one-third that of wave B. How does the period of wave A compare with the period of wave B?

A is three times as long as B

500

Density and propagation speed are:

Inversely related

500

What is the frequency of the sound wave over a time span of 2 μsec? (Image)

2 MHz

500

Which of the following terms best describe the letter A? (Image)

Spatial pulse length

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