ARDMS SPI - ARDMS Sonography Principles and Instrumentation Principles of Image Resolution Questions and Answers

Question 1

A sonographer switches from a 2.5 MHz transducer to a 5.0 MHz transducer to image a superficial structure. Which type of resolution will be MOST improved?

Accepted Answer

Axial resolution

Answer

Contrast resolution

Answer

Temporal resolution

Answer

Elevational resolution

Question 2

Which of the following operator adjustments would lead to a degradation of lateral resolution?

Accepted Answer

Increasing the imaging depth

Answer

Increasing the number of focal zones

Answer

Activating tissue harmonic imaging

Answer

Decreasing the overall gain

Question 3

A sonographer is performing a cardiac echo on a patient with tachycardia and needs to optimize the imaging of the rapidly moving mitral valve leaflets. Which of the following actions will improve temporal resolution?

Accepted Answer

Decreasing the imaging sector width

Answer

Increasing the number of focal zones

Answer

Increasing the line density

Answer

Activating spatial compounding

Question 4

The ability of an ultrasound system to distinguish between two adjacent tissues based on their different echogenicities is known as:

Accepted Answer

Contrast resolution

Answer

Temporal resolution

Answer

Axial resolution

Answer

Spatial resolution

Question 5

Which of the following statements is true regarding the relationship between axial and lateral resolution?

Accepted Answer

Axial resolution remains constant with depth, while lateral resolution varies.

Answer

Axial resolution is typically better than lateral resolution in the far field.

Answer

Both axial and lateral resolution are independent of imaging depth.

Answer

Lateral resolution is primarily determined by the spatial pulse length.

Question 6

To optimize lateral resolution at a specific depth of interest, the sonographer should:

Accepted Answer

Adjust the focal zone to the depth of interest

Answer

Increase the PRF

Answer

Decrease the transducer frequency

Answer

Increase the dynamic range