CCI - Cardiovascular Credentialing International Ultrasound Physics and Instrumentation Questions and Answers

Question 1

A sonographer is performing a pulsed-wave Doppler study of the mitral valve.
They observe aliasing despite having an optimal Doppler angle.
Which of the following adjustments is most likely to correct the aliasing artifact?

Accepted Answer

Switch to continuous-wave (CW) Doppler

Answer

Increase the pulse repetition frequency (PRF)

Answer

Decrease the transducer frequency

Answer

Increase the wall filter

Question 2

Which of the following best describes the relationship between transducer frequency, image resolution, and penetration depth?

Accepted Answer

Higher frequency improves resolution but decreases penetration.

Answer

Higher frequency improves resolution and increases penetration.

Answer

Higher frequency degrades resolution and decreases penetration.

Answer

Lower frequency improves resolution and increases penetration.

Question 3

To improve axial resolution, the sonographer should choose a transducer with:

Accepted Answer

A higher frequency and a short spatial pulse length.

Answer

A lower frequency and a long spatial pulse length.

Answer

A higher frequency and a long spatial pulse length.

Answer

A lower frequency and a short spatial pulse length.

Question 4

In the Doppler equation (Δf = 2 * v * f * cos(θ) / c), what does the cosine of the angle (cos(θ)) represent?

Accepted Answer

The relationship between the angle of the ultrasound beam and the direction of blood flow.

Answer

The velocity of the sound wave in tissue.

Answer

The angle of incidence between the sound beam and the tissue interface.

Answer

The operating frequency of the transducer.

Question 5

A sonographer notices the Thermal Index (TI) reading is elevated during a lengthy fetal ultrasound. Which of the following principles should guide their actions?

Accepted Answer

The ALARA (As Low As Reasonably Achievable) principle.

Answer

The Mechanical Index (MI) is more important for fetal imaging.

Answer

TI values are only relevant for adult cardiac studies.

Answer

Increase the acoustic output to shorten the scan time.

Question 6

Which component of the ultrasound machine is responsible for generating the electrical voltage that excites the piezoelectric crystals in the transducer?

Accepted Answer

Pulser

Answer

Receiver

Answer

Scan Converter

Answer

Beam Former

A sonographer is performing a pulsed-wave Doppler study of the mitral valve.They observe aliasing despite having an optimal Doppler angle.Which of the following adjustments is most likely to correct the aliasing artifact?

A sonographer is performing a pulsed-wave Doppler study of the mitral valve.
They observe aliasing despite having an optimal Doppler angle.
Which of the following adjustments is most likely to correct the aliasing artifact?