ARRT BONE DENSITY EXAM STUDY SET 2026/2027 ||
MEDICAL IMAGING & DEXA REVIEW || VERIFIED
QUESTIONS & ANSWERS || HIGH-YIELD STUDY GUIDE ||
COMPLETE TEST BANK || GRADED A+
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
MEDICAL IMAGING & DEXA REVIEW || VERIFIED
QUESTIONS & ANSWERS || HIGH-YIELD STUDY GUIDE ||
COMPLETE TEST BANK || GRADED A+
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
