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ARRT BONE DENSITY EXAM STUDY SET | 471 QUESTIONS | WITH COMPLETE SOLUTIONS!!
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ARRT BONE DENSITY EXAM STUDY SET | 471 QUESTIONS | WITH COMPLETE SOLUTIONS!!
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ARRT BONE DENSITYEXAM STUDY SET |
471 QUESTIONS |
WITH COMPLETE
SOLUTIONS!!
BONE DENSITY
OCTOBER 20, 2024
EVATEE
,ARRT BONE DENSITY EXAM STUDY SET | 471
QUESTIONS | WITH COMPLETE SOLUTIONS!!
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
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