Chapter 31 Key Terms

Question 1

Detective quantum efficiency (DQE)

Answer 1

measure of the sensitivity and accuracy by which the image receptor converts the incoming data to the output viewing device

Question 2

Dead pixels

Answer 2

non-functioning pixels that do not contribute to the formation of the image, and may even form dead lines when they comprise an entire row

Question 3

External beam evaluation

Answer 3

the measurement of the quantity and quality of the external radiation beam

Question 4

Quality assurance

Answer 4

all activities that provide adequate confidence that a radiology service will render consistently high-quality images and services

Question 5

Quality control

Answer 5

the aspect of quality assurance that monitors technical equipment to maintain superior standards

Question 6

Total rejected image rate

Answer 6

figure to monitor over long periods of time; calculated as percentage of total number of images produced during the period of study