ARDMS SPI - ARDMS Sonography Principles and Instrumentation Quality Assurance and Phantoms Questions and Answers

Question 1

A sonographer is performing a quality assurance test on a duplex ultrasound system to verify the accuracy of spectral Doppler velocity measurements.
Which type of phantom is most appropriate for this task?

Accepted Answer

Doppler flow phantom

Answer

AIUM 100mm test object

Answer

Tissue-equivalent phantom with anechoic cysts

Answer

Beam profile/slice thickness phantom

Question 2

While performing a routine QA scan on a phantom with pins spaced exactly 30 mm apart vertically, a sonographer measures the distance between two pins as 32.5 mm. This indicates a potential issue with which system parameter?

Accepted Answer

Vertical distance accuracy

Answer

Lateral resolution

Answer

Contrast resolution

Answer

System sensitivity

Question 3

A quality assurance program requires testing the system's ability to place echoes in their correct positions on the display, ensuring that a pin target appears in the same location whether imaged from the top or side of the phantom. Which parameter does this test evaluate?

Accepted Answer

Registration accuracy

Answer

Uniformity

Answer

Dynamic range

Answer

Axial resolution

Question 4

During a quality assurance check, a sonographer notes that small reflectors located in the first centimeter of the image, immediately below the transducer face, are not visible. This finding suggests a problem with which performance parameter?

Accepted Answer

Dead zone

Answer

Axial resolution

Answer

Lateral resolution

Answer

Sensitivity

Question 5

A sonographer performs a sensitivity test as part of a quality assurance protocol. This test is designed to assess the system's ability to:

Accepted Answer

detect and display weak echoes from deep structures.

Answer

distinguish between two closely spaced objects perpendicular to the beam.

Answer

accurately measure the size of an anechoic structure.

Answer

maintain uniform brightness of echoes from similar structures at the same depth.

Question 6

Compared to the AIUM 100mm test object, which is filled with a non-attenuating fluid, what is a primary advantage of using a tissue-equivalent (TE) phantom for routine quality assurance?

Accepted Answer

It allows for the evaluation of grayscale and contrast resolution.

Answer

It is better for measuring the speed of sound.

Answer

It is the only phantom that can measure axial resolution.

Answer

It is less expensive to manufacture.