ARRT Bone Density Exam Study Set
questions and answers 2024\2025 A+
Grade
According to the WHO criteria, what is the diagnosis of osteoporosis based on the measurement of bone
density?
- correct answer 2.5 SD or more below the young adult peak bone density
What is the gold standard technique for measuring bone density?
- correct answer DXA
Cancellous bone is also know as?
- correct 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?
- correct 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?
- correct answer L4
Is Forteo a bisphosphonate?
- correct answer NO
,Quantitative Computated Tomography (QCT)
- correct 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 _____________?
- correct answer Screening
What is the most important clinical consequence of osteoporosis?
- correct 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?
- correct answer FRAX
What is the major source of precision error in clinical practice?
- correct answer Technologist
What is the percentage of trabecular bone in the skeleton?
- correct answer 20 %
The forearm is not used to monitor the effects of therapy for osteoporosis because.......
- correct answer rate of change in BMD is too slow
What site is mostly composed of cortical bone?
- correct answer Proximal forearm
What are the advantages of QUS over x-ray methodologies for BMD measurement?
- correct 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?
- correct answer Iodine-125
What is the texture index that evaluates the pixel gray-level variations in lumber spine DXA images?
- correct answer TBS (Trabecular Bone Score)
When does type 2 primary osteoporosis generally occur?
- correct answer after age 70
What technique used images of the hand and an aluminum wedge?
- correct answer RA (Radiograhic Absorptiometry)
New bone is formed by the ___________?
- correct answer osteoblasts
Cancellous bone is also known as _______________?
- correct answer Trabecular bone
How would you start labeling the vertebral bodies on a PA lumbar scan?
- correct answer Start at L4 and count/label up
With changes in rotation of the femoral neck, what happens?
- correct answer Increases the BMD
If daily QC fails, what should be your first step of action?
- correct 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..........
- correct 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
__________________
- correct answer osteoclasts
Which site is preferred for determination of fracture prediction?
- correct answer proximal femur
What is one disease not associated with low BMD?
- correct answer osteopetrosis
DXA results may be influenced by.........
- correct answer -body thickness
-degenerative changes
-fractures
-scan mode
A great forearm scan should include.......
- correct answer -forearm centered
questions and answers 2024\2025 A+
Grade
According to the WHO criteria, what is the diagnosis of osteoporosis based on the measurement of bone
density?
- correct answer 2.5 SD or more below the young adult peak bone density
What is the gold standard technique for measuring bone density?
- correct answer DXA
Cancellous bone is also know as?
- correct 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?
- correct 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?
- correct answer L4
Is Forteo a bisphosphonate?
- correct answer NO
,Quantitative Computated Tomography (QCT)
- correct 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 _____________?
- correct answer Screening
What is the most important clinical consequence of osteoporosis?
- correct 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?
- correct answer FRAX
What is the major source of precision error in clinical practice?
- correct answer Technologist
What is the percentage of trabecular bone in the skeleton?
- correct answer 20 %
The forearm is not used to monitor the effects of therapy for osteoporosis because.......
- correct answer rate of change in BMD is too slow
What site is mostly composed of cortical bone?
- correct answer Proximal forearm
What are the advantages of QUS over x-ray methodologies for BMD measurement?
- correct 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?
- correct answer Iodine-125
What is the texture index that evaluates the pixel gray-level variations in lumber spine DXA images?
- correct answer TBS (Trabecular Bone Score)
When does type 2 primary osteoporosis generally occur?
- correct answer after age 70
What technique used images of the hand and an aluminum wedge?
- correct answer RA (Radiograhic Absorptiometry)
New bone is formed by the ___________?
- correct answer osteoblasts
Cancellous bone is also known as _______________?
- correct answer Trabecular bone
How would you start labeling the vertebral bodies on a PA lumbar scan?
- correct answer Start at L4 and count/label up
With changes in rotation of the femoral neck, what happens?
- correct answer Increases the BMD
If daily QC fails, what should be your first step of action?
- correct 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..........
- correct 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
__________________
- correct answer osteoclasts
Which site is preferred for determination of fracture prediction?
- correct answer proximal femur
What is one disease not associated with low BMD?
- correct answer osteopetrosis
DXA results may be influenced by.........
- correct answer -body thickness
-degenerative changes
-fractures
-scan mode
A great forearm scan should include.......
- correct answer -forearm centered
