Exam 14: Ultrasound Equipment Quality Assurance

Maximum depth of visualization tests are performed using _____ receiver gain and _____ transmit power.

The maximum depth of visualization can indicate changes in

A scan is done of a uniform section in a phantom, and a vertical shadow emanates from a position on the image corresponding to the transducer surface.This is likely caused by

On the viewing monitor of a scanner, a sonographer counts 16 shades of gray in the gray-bar pattern.The hard-copy B-mode image displays only the 13 brightest gray bars.This should be interpreted as

A measurement comparing the actual separation between two reflectors placed at different positions along the beam axis with the separation indicated on the calipers is a test of

For which of the following tests would it be acceptable for the results to vary with the transducer frequency?

Maximum depth of visualization is often limited by

A measure of the minimum spacing along the beam axis that still allows two reflectors to be identified is called the

For the measurement described in question 7, the digital caliper cursors should be placed at the

Suppose that the maximum depth of visualization using a 3.5-MHz transducer is 14.2 cm.On the previous two tests, 3 months and 6 months earlier, it was 14.4 and 14.1 cm, respectively.These variations should be interpreted as