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