Chapter 13: Lower Gastrointestinal
System.
A patient comes to radiology for a barium enema (BE).He has a possible fistula extending
from the rectum to the urinary bladder.Which one of the following projections and/or
positions would best demonstrate the fistula?
A) Lateral rectum position
B) AP erect projection
C) LPO axial projection
D) LPO and RPO positions - correct answer-A
A patient comes to radiology for a double-contrast barium enema.The patient cannot lie on
her side during the study.Which of the following projections could replace the lateral rectum
projection?
A) AP axial
B) LPO axial projection
C) Ventral decubitus
D) Dorsal decubitus - correct answer-C
A patient comes to radiology with a history of rectocele.Which of the following procedures
best demonstrates this condition?
A) Single-contrast barium enema
B) Evacuative proctogram
C) Double-contrast barium enema
D) Enteroclysis - correct answer-B
A patient comes to radiology with possible diverticulosis.Which of the following studies is
most diagnostic for detecting this condition?
A) Single-contrast barium enema
B) Double-contrast barium enema
C) Evacuative proctogram
D) Small bowel series - correct answer-b
A radiograph of an AP barium enema (BE )projection reveals poor visualization of the
sigmoid due to excessive superimposition of the sigmoid colon and rectum. How can this
area be better visualized on the repeat exposure?
A) Angle the central ray (CR) 30° to 40° cephalad with AP projection.
B) Increase kV.
C) Take a PA projection with the patient in the left lateral decubitus position.
D) Take a PA projection with a 30° to 40° cephalad CR angle. - correct answer-A
A single-stage,double-contrast barium enema involves instilling both the negative and
positive contrast media at the same time.
A. True
B. False - correct answer-A
, A telescoping,or invagination,of one part of the intestine into another is termed:
A) diverticulosis.
B) volvulus.
C) intussusception.
D) colitis. - correct answer-C
A twisting of the intestine on its own mesentery is termed:
A) intussusception.
B) volvulus.
C) diverticulosis.
D) enteritis. - correct answer-B
An infant is brought to the ED with a possible intussusception.
Which of the following procedures may actually correct this condition?
A) Small bowel enema
B) Small bowel series
C) Defecography
D) Barium or air enema - correct answer-D
At what stage of respiration should the enema tip be inserted into the rectum?
A) During deep breaths
B) During shallow breaths
C) Suspended inspiration
D) Suspended expiration - correct answer-D
Central ray and image receptor centering for a 1-hour small bowel radiograph should be:
A) 2 inches (5 cm) above level of the iliac crest.
B) at the level of the iliac crest.
C) 1 inch (2.5 cm) below the level of the iliac crest.
D) at the level of the ASIS. - correct answer-B
Computed tomography colonography (CTC)is considered as an effective alternative to
endoscopic colonoscopy.
A. True
B. False - correct answer-A
CT may be performed to diagnose acute appendicitis.
A. True
B. False - correct answer-A
During a colostomy barium enema, a double-contrast retention enema tip is used.
A. True
B. False - correct answer-B
During a double-contrast barium enema (BE) procedure, the radiologist suspects a polyp in
the descending colon. Which position would best demonstrate this?
A) Supine for AP projection
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