ARRT BONE DENSITY EXAM STUDY
SET QUESTIONS AND ANSWERS |
ALREADY PASSED | LATEST UPDATE
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
What is one disease not associated with low BMD? -
,,,,answer,,,..osteopetrosis
DXA results may be influenced by......... - ,,,,answer,,,..-body thickness
-degenerative changes
-fractures
-scan mode
A great forearm scan should include....... - ,,,,answer,,,..-forearm
centered
-forearm straight
-free of artifacts
Phantoms that mimic the shape and size of a skeletal region are called
______________________________. - ,,,,answer,,,..anthromomorphic
phantoms
What is the formula used to calculate BMD? - ,,,,answer,,,..BMD =
BMC/Area
SET QUESTIONS AND ANSWERS |
ALREADY PASSED | LATEST UPDATE
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
What is one disease not associated with low BMD? -
,,,,answer,,,..osteopetrosis
DXA results may be influenced by......... - ,,,,answer,,,..-body thickness
-degenerative changes
-fractures
-scan mode
A great forearm scan should include....... - ,,,,answer,,,..-forearm
centered
-forearm straight
-free of artifacts
Phantoms that mimic the shape and size of a skeletal region are called
______________________________. - ,,,,answer,,,..anthromomorphic
phantoms
What is the formula used to calculate BMD? - ,,,,answer,,,..BMD =
BMC/Area
