DXA Module 14

Question 1

What quality does precision assessment measure?

Answer 1

reproducibility

Question 2

How much radiation does DXA expose patients to relative to background radiation

Answer 2

less than 1 days worth of background radiation

Question 3

Which skeletal site offers the highest precision and most rapid response to treatment?

Answer 3

lumbar spine

Question 4

When should cross-calibration be performed?

Answer 4

when changing DXA hardware

Question 5

To cross-calibrate DXA equipment, 30 patients representing the facility’s population should be scanned once on the old system and twice on the new system within how many days?

Answer 5

60 days

Question 6

Serial scanning of a patient’s bone mineral density values can be used to monitor what?

Answer 6

response to therapy

Question 7

Quality control includes any process or system of measures with what goal?

Answer 7

assessing quality

Question 8

What is the main purpose of Stewart rules as they apply to bone densitometry?

Answer 8

Evaluating scanner precision

Question 9

Spine phantoms used in quality control testing for DXA scanners are called?

Answer 9

anthropomorphic phantoms