ARDMS SPI - ARDMS Sonography Principles and Instrumentation Image Formation and Processing Questions and Answers

Question 1

A sonographer is trying to improve the temporal resolution while imaging the fetal heart. Which of the following adjustments would be most effective?

Accepted Answer

Decreasing the imaging depth

Answer

Increasing the number of focal zones

Answer

Widening the sector size

Answer

Increasing the line density

Question 2

Which of the following functions is considered a preprocessing function because it can only be performed on a live image before the data is stored in the scan converter?

Accepted Answer

Write Magnification

Answer

Read Magnification

Answer

Adding caliper measurements

Answer

Adjusting the grayscale map

Question 3

The primary function of the scan converter in an ultrasound system is to:

Accepted Answer

Format the echo data from the spoke format into a video format for display.

Answer

Convert electrical signals into acoustic pulses.

Answer

Amplify the weak returning echo signals.

Answer

Calculate the Doppler shift from moving red blood cells.

Question 4

An ultrasound system's ability to display many shades of gray is most directly related to which of the following?

Accepted Answer

The number of bits per pixel

Answer

The number of active channels

Answer

The transducer frequency

Answer

The pulse repetition frequency

Question 5

A sonographer freezes an image and then activates the zoom function to enlarge a specific area of interest. This action results in larger pixels and does not improve spatial resolution. Which type of magnification was used?

Accepted Answer

Read magnification

Answer

Write magnification

Answer

Focal magnification

Answer

Acoustic magnification

Question 6

During an abdominal ultrasound, a sonographer decides to increase the line density to improve lateral resolution. Which of the following is an expected trade-off for this adjustment?

Accepted Answer

Decreased frame rate

Answer

Increased penetration depth

Answer

Improved axial resolution

Answer

Decreased contrast resolution