Bone Density Registry Review Final Exam Prep Test Bank
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What is the chief benefit of using a high and low x-ray energy source
with a DXA system?
A) Reduces patient dose significantly.
B) Reduces wear and tear on the x-ray tube to change energies.
C) Demonstrates attenuation difference between bone and soft
tissue.
D) Reduces postprocessing time of bone for the digital image. -
ANSWERS--C
The purpose of bone densitometry is to:
A) establish the diagnosis of osteoporosis.
B) assess the response to osteoporosis therapy.
C) measure bone mineral density.
D) do all of the above. - ANSWERS--D
Which vertebral region(s)is (are)analyzed during a DXA scan?
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A) T12
B) T7 to L1
C) L1 to L5
D) L4 to S2 - ANSWERS--C
All are risk factors for osteoporosis,except:
A) daily physical activity
B) alcohol consumption.
C) low body weight.
D) low calcium intake. - ANSWERS--A
Bone-destroying cells are called:
A) osteoblasts.
B) osteoclasts.
C) cancellous.
D) cortical. - ANSWERS--B
Peak bone mass is reached at about age _____ years.
A) 10 to 20
B) 20 to 30
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C) 30 to 40
D) 40 to 50 - ANSWERS--B
The most common osteoporotic fracture is found in the:
A) hips.
B) femurs.
C) vertebrae.
D) ankles. - ANSWERS--C
Accuracy in bone densitometry relates to the ability of the system to:
A) measure the true value of an object.
B) reproduce the same results in repeat measurements of the same
object.
C) reflect the bone measurement by the scanner software.
D) measure the variability of the spread of data values around the
mean. - ANSWERS--A
Precision relates to the ability of the system to:
A) measure the true value of an object.
B) reproduce the same results in repeat measurements of the same
object.
C) reflect the bone measurement by the scanner software.