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ARRT Bone Density Exam Study Set (updated & already graded A+).
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ARRT Bone Density Exam Study Set (updated & already graded A+).
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ARRT Bone Density Exam StudySet 2025-2026(updated & already
graded A+)
According to the WHO criteria, what is the diagnosis of
osteoporosis based on the measurement of bone density?
- answer 2.5 SD or more below the young adult peak bone
density
What is the gold standard technique for measuring bone
density? - answer DXA
Cancellous bone is also know as? - answer Trabecular Bone
What is the anatomical landmark on the proximal femur
that gives the best visual indication of the degree of
rotation of the proximal femur? - answer Lesser
Trochanter
Which lumbar vertebra is described as having a
characteristic shape of an X or and H on a DXA PA spine
scan? - answer L4
Is Forteo a bisphosphonate? - answer NO
Quantitative Computated Tomography (QCT) - answer -
measurements are volumetric
,-trabecular bone can be isolated from cortical bone
-accuracy may be affected by marrow fat
Peripheral BMD measurements are advocated for
_____________? - answer Screening
What is the most important clinical consequence of
osteoporosis? - answer Fracture
What is the name of the tool that integrates clinical
information in a quantitative manner to predict a 10-year
probability of major osteoporotic fracture for both men
and women? - answer FRAX
What is the major source of precision error in clinical
practice? - answer Technologist
What is the percentage of trabecular bone in the skeleton?
- answer 20 %
The forearm is not used to monitor the effects of therapy
for osteoporosis because....... - answer rate of change in
BMD is too slow
What site is mostly composed of cortical bone? - answer
Proximal forearm
,What are the advantages of QUS over x-ray methodologies
for BMD measurement? - answer -ultrasound is
comparatively inexpensive
-patients are not subjected to ionizing radiation
-ultrasound exams are quick to perform
What is the name of the isotope that was used in SPA? -
answer Iodine-125
What is the texture index that evaluates the pixel gray-
level variations in lumber spine DXA images? - answer TBS
(Trabecular Bone Score)
When does type 2 primary osteoporosis generally occur? -
answer after age 70
What technique used images of the hand and an aluminum
wedge? - answer RA (Radiograhic Absorptiometry)
New bone is formed by the ___________? - answer
osteoblasts
Cancellous bone is also known as _______________? - answer
Trabecular bone
, How would you start labeling the vertebral bodies on a PA
lumbar scan? - answer Start at L4 and count/label up
With changes in rotation of the femoral neck, what
happens? - answer Increases the BMD
If daily QC fails, what should be your first step of action? -
answer -repeat the scan
-if scan fails again, then call for help
Although the technology is similar with all of the DXA
units, the BMD results are different because.......... -
answer -different calibration standards
-algorithms to calculate BMD
-differences in the ROI
-different databases
The primary mechanism of action of antiresorptive
therapies is the direct interaction with the
__________________ - answer osteoclasts
Which site is preferred for determination of fracture
prediction? - answer proximal femur
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