RADR 1311 MIDTERM EXAM QUESTIONS AND
ANSWERS VERIFIED 100% CORRECT. UPDATED
2027
What CR centering should be used for a dorsal decubitus projection of the
abdomen (if the diaphragm is to be included)? - ANSWER -2 inches (5 cm) above
iliac crest
A patient is in the intensive care unit after abdominal surgery. The surgeon is
concerned about a possible perforated bowel. The patient cannot stand or sit.
Which of the following positions will best demonstrate any possible intra-
abdominal free air?
a. Right lateral decubitus
b. Dorsal decubitus
c. Ventral decubitus
d. Let lateral decubitus - ANSWER -d. Left lateral decubitus
Why is the PA projection of the abdomen less desirable for a KUB than the AP
projection? - ANSWER -Kidneys are farther from the image receptor with PA
projection
A 3-year-old patient comes to radiology for an abdominal study. Even with careful
instructions and immobilization, the patient is having difficulty holding still.
Which of the following should be done to minimize motion on the radiograph? -
ANSWER -Use a shorter exposure time.
A radiograph of an AP KUB reveals that the obturator foramina are cut off from
the bottom of the image. The kidneys and symphysis pubis are demonstrated. What
centering adjustments should the technologist make to improve this image? -
ANSWER -This radiograph is correctly centered. No centering adjustments are
necessary.
, Which of the following kVp ranges (digital system) is recommended for a KUB
on an adult? - ANSWER -80 +/- 5 kVp
Where is the CR centered for the AP erect projection of the abdomen? -
ANSWER -2 inches (5 cm) above iliac crest
Which radiographic landmark is most reliable to evaluate the posteroanterior (PA)
projection of the abdomen for rotation? - ANSWER -Ala of ilium (wings)
A patient comes to radiology with a clinical history of an umbilical hernia. Which
one of the following abdomen projections would best demonstrate it?
a. AP erect abdomen
b. Left lateral decubitus
c. KUB
d. Dorsal decubitus - ANSWER -d. Dorsal decubitus
A 16-year-old female patient enters the emergency department (ED) with a
possible kidney stone. She complains of pain in the right lower pelvis region.
Which of the following options should be taken in regard to cicadas shielding?
a. Do not use it
b. Use it on all projections if correctly placed
c. Use it on the preliminary projection only
d. All the patient or her parents for their permission to not shield the gonads -
ANSWER -a. Do not use it
For an average-size female patient, where is the CR placed for a PA projection of
the chest? - ANSWER -7 inches (18 cm) below the vertebra prominens
At what level should the central ray (CR) be placed for a left lateral decubitus
projection of the abdomen? - ANSWER -2 inches (5 cm) above the iliac crest
Of the following positioning actions, which one will remove the most of the
scapulae from the lung fields?
a. Roll shoulders forward
b. Depress shoulders
ANSWERS VERIFIED 100% CORRECT. UPDATED
2027
What CR centering should be used for a dorsal decubitus projection of the
abdomen (if the diaphragm is to be included)? - ANSWER -2 inches (5 cm) above
iliac crest
A patient is in the intensive care unit after abdominal surgery. The surgeon is
concerned about a possible perforated bowel. The patient cannot stand or sit.
Which of the following positions will best demonstrate any possible intra-
abdominal free air?
a. Right lateral decubitus
b. Dorsal decubitus
c. Ventral decubitus
d. Let lateral decubitus - ANSWER -d. Left lateral decubitus
Why is the PA projection of the abdomen less desirable for a KUB than the AP
projection? - ANSWER -Kidneys are farther from the image receptor with PA
projection
A 3-year-old patient comes to radiology for an abdominal study. Even with careful
instructions and immobilization, the patient is having difficulty holding still.
Which of the following should be done to minimize motion on the radiograph? -
ANSWER -Use a shorter exposure time.
A radiograph of an AP KUB reveals that the obturator foramina are cut off from
the bottom of the image. The kidneys and symphysis pubis are demonstrated. What
centering adjustments should the technologist make to improve this image? -
ANSWER -This radiograph is correctly centered. No centering adjustments are
necessary.
, Which of the following kVp ranges (digital system) is recommended for a KUB
on an adult? - ANSWER -80 +/- 5 kVp
Where is the CR centered for the AP erect projection of the abdomen? -
ANSWER -2 inches (5 cm) above iliac crest
Which radiographic landmark is most reliable to evaluate the posteroanterior (PA)
projection of the abdomen for rotation? - ANSWER -Ala of ilium (wings)
A patient comes to radiology with a clinical history of an umbilical hernia. Which
one of the following abdomen projections would best demonstrate it?
a. AP erect abdomen
b. Left lateral decubitus
c. KUB
d. Dorsal decubitus - ANSWER -d. Dorsal decubitus
A 16-year-old female patient enters the emergency department (ED) with a
possible kidney stone. She complains of pain in the right lower pelvis region.
Which of the following options should be taken in regard to cicadas shielding?
a. Do not use it
b. Use it on all projections if correctly placed
c. Use it on the preliminary projection only
d. All the patient or her parents for their permission to not shield the gonads -
ANSWER -a. Do not use it
For an average-size female patient, where is the CR placed for a PA projection of
the chest? - ANSWER -7 inches (18 cm) below the vertebra prominens
At what level should the central ray (CR) be placed for a left lateral decubitus
projection of the abdomen? - ANSWER -2 inches (5 cm) above the iliac crest
Of the following positioning actions, which one will remove the most of the
scapulae from the lung fields?
a. Roll shoulders forward
b. Depress shoulders
