ARRT Bone Density Exam Study Questions and Answers |Fall
2025/2026 Update | 100% Correct Latest
Question 1
How long should a patient wait to have a DXA scan after recent contrast studies or recent radiopharmaceuticals?
Correct Answer
patient should wait 2 weeks before having a DXA
Question 2
Disadvantage of DXA
Correct Answer
-doesn't take into account bone thickness
-it's influenced by body size and bone size
-integrates cortical and trabecular bone
Question 3
FRAX
Correct Answer
-computer based algorithm developed by WHO to predict a 10 year risk of fragility fractures
-measures the femoral neck
Page 1 of 151
,Question 4
Fan beam scan arm motion
Correct Answer
linear
Question 5
As age increases every 10 years Relative Risk multiplies by 2
Correct Answer
Question 6
Where are markers of bone formation released from?
Correct Answer
the osteoblasts
Question 7
When analyzing the PA spine, what should you not mess with?
Correct Answer
Width of ROI box
Page 2 of 151
,Question 8
What is the percentage of trabecular bone in the skeleton?
Correct Answer
20 %
Question 9
What is the measurement of absorbed dose?
Correct Answer
gray (gy)
Question 10
always pick the lowest T-score to make a diagnosis
Correct Answer
Question 11
Fan Beam Scanner
Correct Answer
-utilizes a fan shaped beam and an array of detectors
-an entire scan line can be instantly recorded
-detectors aquire one line at a time
Page 3 of 151
, Question 12
Why isn't the forearm used to monitor treatment for osteoporosis?
Correct Answer
-it is made up of 99% cortical bone
-cortical bone has a much slower response to therapies
Question 13
What is the summary graph?
Correct Answer
-graph at the bottom that shows and compares the numbers
Question 14
Common challenges of positioning an L-spine
Correct Answer
-curvature
-patient can't put legs up onto leg block
-patient can't lay flat
Page 4 of 151
2025/2026 Update | 100% Correct Latest
Question 1
How long should a patient wait to have a DXA scan after recent contrast studies or recent radiopharmaceuticals?
Correct Answer
patient should wait 2 weeks before having a DXA
Question 2
Disadvantage of DXA
Correct Answer
-doesn't take into account bone thickness
-it's influenced by body size and bone size
-integrates cortical and trabecular bone
Question 3
FRAX
Correct Answer
-computer based algorithm developed by WHO to predict a 10 year risk of fragility fractures
-measures the femoral neck
Page 1 of 151
,Question 4
Fan beam scan arm motion
Correct Answer
linear
Question 5
As age increases every 10 years Relative Risk multiplies by 2
Correct Answer
Question 6
Where are markers of bone formation released from?
Correct Answer
the osteoblasts
Question 7
When analyzing the PA spine, what should you not mess with?
Correct Answer
Width of ROI box
Page 2 of 151
,Question 8
What is the percentage of trabecular bone in the skeleton?
Correct Answer
20 %
Question 9
What is the measurement of absorbed dose?
Correct Answer
gray (gy)
Question 10
always pick the lowest T-score to make a diagnosis
Correct Answer
Question 11
Fan Beam Scanner
Correct Answer
-utilizes a fan shaped beam and an array of detectors
-an entire scan line can be instantly recorded
-detectors aquire one line at a time
Page 3 of 151
, Question 12
Why isn't the forearm used to monitor treatment for osteoporosis?
Correct Answer
-it is made up of 99% cortical bone
-cortical bone has a much slower response to therapies
Question 13
What is the summary graph?
Correct Answer
-graph at the bottom that shows and compares the numbers
Question 14
Common challenges of positioning an L-spine
Correct Answer
-curvature
-patient can't put legs up onto leg block
-patient can't lay flat
Page 4 of 151
