DEXA Exam Updated Actual Questions
and CORRECT Answers
What is the current ISCD guidelines for precision for a technologist? - CORRECT
ANSWER 1.9 at lumbar spine, 1.8 total hip, 2.5 femoral neck
What is the LSC for precision? - CORRECT ANSWER least significant change
When should precision be done? - CORRECT ANSWER at least once, new tech begins
scanning or major equipment change
how often should a DXA be done? - CORRECT ANSWER once every 2 years
which skeletal sites should be used for monitoring? - CORRECT ANSWER 1. Measure
the skeletal site or type of bone that is expected to be affected by the disease process or
therapy.
2.of those sites, measure the site with greatest change in BMD is expected to change.
3. of those sites, measure the site with BMD with best precision.
4. peripheral sites are not used for monitoring by any technique
What are some sources of precision error? - CORRECT ANSWER ideally, same
technologist would perform baseline and follow up on the same machine. different machine
LSC value for precision - CORRECT ANSWER LSC 95% confidence
What is absolute fracture risk in clinical practice? - CORRECT ANSWER first is over
what time frame the particular risk applies and second is the type of fracture to which
absolute risk applies. like 5 years, 10 years, for hip fracture
FRAX - CORRECT ANSWER WHO fracture risk assessment tool
and CORRECT Answers
What is the current ISCD guidelines for precision for a technologist? - CORRECT
ANSWER 1.9 at lumbar spine, 1.8 total hip, 2.5 femoral neck
What is the LSC for precision? - CORRECT ANSWER least significant change
When should precision be done? - CORRECT ANSWER at least once, new tech begins
scanning or major equipment change
how often should a DXA be done? - CORRECT ANSWER once every 2 years
which skeletal sites should be used for monitoring? - CORRECT ANSWER 1. Measure
the skeletal site or type of bone that is expected to be affected by the disease process or
therapy.
2.of those sites, measure the site with greatest change in BMD is expected to change.
3. of those sites, measure the site with BMD with best precision.
4. peripheral sites are not used for monitoring by any technique
What are some sources of precision error? - CORRECT ANSWER ideally, same
technologist would perform baseline and follow up on the same machine. different machine
LSC value for precision - CORRECT ANSWER LSC 95% confidence
What is absolute fracture risk in clinical practice? - CORRECT ANSWER first is over
what time frame the particular risk applies and second is the type of fracture to which
absolute risk applies. like 5 years, 10 years, for hip fracture
FRAX - CORRECT ANSWER WHO fracture risk assessment tool
