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ARDMS SPI - Sonography Principles and Instrumentation

Page: 4 / 6
Total 187 questions

Which system control adjusts amplification of signals as a function of depth?

A.

Output power

B.

Time gain compensation

C.

Transmit focus

D.

Reject

What is the result of increased transducer damping?

A.

Longer pulse length

B.

Increased sensitivity

C.

Narrow beam width

D.

Improved axial resolution

What is the relationship between overall gain and image brightness?

A.

The higher the overall gain, the brighter the image

B.

The lower the overall gain, the brighter the image

C.

The higher the overall gain, the darker the image

D.

There is no relationship between overall gain and image brightness

Which settings would produce the best temporal resolution?

A.

More focal zones and shallower depth

B.

More focal zones and deeper depth

C.

Fewer focal zones and shallower depth

D.

Fewer focal zones and deeper depth

Which statement describes the purpose of using a spectral Doppler wall filter?

A.

To widen the area in which the Doppler shift is sampled

B.

To clean up the audio signals

C.

To eliminate the higher velocity signals

D.

To eliminate the lower velocity signals

What parameter change reduces spectral Doppler aliasing?

A.

Increase Doppler angle

B.

Change color scale

C.

Decrease pulse repetition frequency

D.

Utilize m-mode

Which pulsed-wave Doppler adjustment would be appropriate to correct the aliasing seen in this image?

A.

Increase the spectral Doppler gain.

B.

Decrease the spectral Doppler gain.

C.

Increase the Doppler pulse repetition frequency.

D.

Decrease the Doppler pulse repetition frequency.

What information does the ultrasound system calculate to display color flow?

A.

Peak Doppler frequency

B.

Mean Doppler frequency

C.

Peak velocity of flow

D.

Minimum velocity of flow

Which characteristic of ultrasound transmission is directly proportional to an increase in frequency?

A.

Wavelength

B.

Pulse duration

C.

Attenuation

D.

Penetration

What is the primary interaction that occurs when sound waves encounter a smooth, flat surface?

A.

Attenuation

B.

Reflection

C.

Diffraction

D.

Interference