ARRT BONE DENSITY EXAM STUDY SET – QUESTIONS AND
100% ACCURATE DETAILED ANSWERS NEWEST 26/27
A postmenopausal woman with a femoral neck T-score of -2.0
SD below a young adult is to be classified as.......
Osteopenia
What happens when there is an imbalance or uncoupling of the
remodeling cycle?
The usual result is a net loss in the bone mass
A technologist should perform a precision study in order to
calculate _______________.
LSC (Least Significant Change)
A DXA scanner that uses a single detector and a pinhole
collimator is a........
Pencil beam scanner
,Regarding Shewart Rules, the control limits are based on what
percentage of the average values?
1.5% (3 SD)
What is the sum of the data values divided by the number of
values?
Mean
A DXA system that employs a rare earth filtered x-ray source
uses what type of detector?
Pulse counting
The characteristic shapes of the vertebrae seen on the DXA
image are primarily based on the appearance of the
____________ elements.
Posterior
Accuracy
-ability to measure true value
,-most important for diagnosis
-less important for serial monitoring
-affected by the technology
Cortical bone makes up what?
Outer cover of bones
What percentage of trabecular bone is found in the PA spine?
66%
The forearm, pelvis, and scapula all belong to which skeletal
classification?
Appendicular
, The WHO criteria for diagnosing osteoporosis was initially to
apply to only........
Postmenopausal Caucasian women
In order to do a compare analysis...
-the patient must have a previous scan done on the same
anatomy
-you must retrieve the baseline study
-patient position must be consistent
How many degrees should you rotate the femur when
positioning for a proximal femur scan?
15-25 degrees
When should Z-scores be used to make a diagnosis instead of
T-scores?
Males or females under age 20
100% ACCURATE DETAILED ANSWERS NEWEST 26/27
A postmenopausal woman with a femoral neck T-score of -2.0
SD below a young adult is to be classified as.......
Osteopenia
What happens when there is an imbalance or uncoupling of the
remodeling cycle?
The usual result is a net loss in the bone mass
A technologist should perform a precision study in order to
calculate _______________.
LSC (Least Significant Change)
A DXA scanner that uses a single detector and a pinhole
collimator is a........
Pencil beam scanner
,Regarding Shewart Rules, the control limits are based on what
percentage of the average values?
1.5% (3 SD)
What is the sum of the data values divided by the number of
values?
Mean
A DXA system that employs a rare earth filtered x-ray source
uses what type of detector?
Pulse counting
The characteristic shapes of the vertebrae seen on the DXA
image are primarily based on the appearance of the
____________ elements.
Posterior
Accuracy
-ability to measure true value
,-most important for diagnosis
-less important for serial monitoring
-affected by the technology
Cortical bone makes up what?
Outer cover of bones
What percentage of trabecular bone is found in the PA spine?
66%
The forearm, pelvis, and scapula all belong to which skeletal
classification?
Appendicular
, The WHO criteria for diagnosing osteoporosis was initially to
apply to only........
Postmenopausal Caucasian women
In order to do a compare analysis...
-the patient must have a previous scan done on the same
anatomy
-you must retrieve the baseline study
-patient position must be consistent
How many degrees should you rotate the femur when
positioning for a proximal femur scan?
15-25 degrees
When should Z-scores be used to make a diagnosis instead of
T-scores?
Males or females under age 20
