RAD 165 Questions and Correct Answers/ Latest Update / Already Graded

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RAD 165 Questions and Correct Answers/ Latest
Update / Already Graded
The two major principles in creating medical a medical image are:

a. spatial resolution & noise

b. spatial resolution & contrast resolution

c. contrast resolution & modulation transfer function

d. dynamic range & contrast resolution

Ans: b. spatial resolution & contrast resolution


The human eye can detect _____ different shades of gray.

a. 5

b. 10

c. 20

d. 30

Ans: d. 30


As mAs is increased the signal-to-noise ratio is _____.

a. not affected

b. doubled

c. increased

d. decreased

Ans: c. increased


T or F: Exposures in digital radiography (DR) should not be repeated due to
improper brightness or contrast.

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Ans: True


Digital radiography image detail's proper term is ________ __________.

Ans: spatial resolution


Detective Quantum Efficiency (DQE) in digital radiography is related to ________
of the x-ray beam.

a. absorption efficiency

b. capture element

c. crystal phophors

d. pixel size

Ans: a. absorption efficiency


Which is the principle advantage of digital imaging over film screen?

a. increased fog production

b. increased time

c. decreased floor footprint (size)

d. decreased patient dose

Ans: d. decreased patient dose


Which of the following ionizing radiographic equipment has the best contrast
resolution?

a. CT

b. MRI

c. Nuc Med