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DIAGNOSTIC IMAGING EXAM WITH QUESTIONS AND CORRECT ANSWERS
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DIAGNOSTIC IMAGING EXAM WITHQUESTIONS AND CORRECT ANSWERS
How are radiographs created? - ANSWER X-ray tube generates x-rays --> x-rays
ionize atoms (net charge) --> pass through patient, beam is attenuated --> reduction
of x-ray photons --> leftover beam goes through patient --> recorded by image
receptor --> radiograph.
Which of the following is incorrect concerning radiodensity?
a) The degree of attenuation of the x-ray beam.
b) it is inversely related to radiographic density.
c) An item with significant radiodensity appears dark on imaging.
d) An object with high radiodensity is radiopaque. ANSWER: c) An object with
high radiodensity appears black on imaging.
Objects with high radiodensity have low radiographic densities. This would make
the image radiopaque, which implies that more X-rays are attenuated from the
beam and appear white on imaging.
Which of the following is correct concerning radiographic density?
a) it is directly related to radiodensity.
b) an object with high radiographic density appears white or bright on imaging.
c) An object with high radiographic density is radiopaque.
d) The degree of blackening on a radiograph
,Radiographic density is inversely related to radiodensity (if one grows, the other
decreases).
Which of the following describes an object that attenuates a large amount of X-rays
from the beam and appears white under imaging? (HINT: There could be more than
one valid answer.)
a) radiolucent.
B) radiopaque.
c) high radiodensity and low radiography density.
d) high radiographic density, low radiodensity - ANSWER b) radiopaque and c)
high radiodensity, low radiographic density.
Radiopaque refers to an entity with a high radiodensity but a low radiograph
density. These objects attenuate a large number of X-rays from the beam, resulting
in fewer X-rays reaching the image receptor and causing the object to appear white
on imaging.
Which of the following objects will typically show radiopaque on radiographs?
a) Cortical bone
b) air
c) metal and calcified gallbladder or kidney stones
d) fat - ANSWER c) metal and hardened gallstones or kidney stones
Radiopaque objects are typically made of heavy metal (e.g., fillings, surgical
instruments). The only time we observe radiopaque human tissue is when it
contains calcified gallstones or kidney stones.
,Which of the following describes an object that absorbs very little amounts of
x-rays from the beam and appears dark when imaged? (HINT: There could be more
than one valid answer.)
a) radiolucent.
B) radiopaque.
c) high radiodensity and low radiography density.
Answer: a) radiolucent and d) high radiographic density, low radiodensity.
Radiolucent refers to an object with a high radiography density but a low radio
density. These items attenuate modest amounts of x-rays from the beam, allowing
the majority of x-rays to reach the image receptor, making the object seem dark
when imaged.
Which of the following objects will typically show radiolucent on a radiograph?
a) Cortical bone
b) air
c) metal and calcified gallbladder or kidney stones
D) fat - ANSWER b) air
Radiolucent objects attenuate just a small quantity of x-rays from the beam,
allowing the majority to reach the image receptor. Air is the most radiolucent item
on radiographs.
, Match the AP, PA, lateral, and oblique projections to the definitions below.
a) The beam moves from anterior to posterior.
b) the beam moves from posterior to anterior
c) The beam passes from the side nearest to the image receptor.
d) beam passes at an angle, designated after the side nearest to the image receptor -
ANSWER a) anteroposterior (AP).
B) posteroanterior (PA)
C) Lateral
D) oblique
True or False:
ANSWER True: Structures closer to the image receptor are better defined.
Structures that are closer to the image receptor (aka farther away from the x-ray
source) are well defined.
When you increase the radiographic density, a radiograph becomes darker.
a) underexposed.
c) Overexposed.
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