RAD 166 Lower Gastrointestinal pt.3 Questions and Correct Answers/ Latest Update / Already Graded

1 | Page
RAD 166 Lower Gastrointestinal pt.3 Questions
and Correct Answers/ Latest Update / Already
Graded
In what position is the enema tip inserted?

Ans: sims position


What are the three lower GI procedures?

Ans: single-contrast barium enema, double-contrast barium enema, and
defecography


What projection is routine for a small bowel series?

Ans: PA projection


CR location for the first PA projection of a small bowel series

Ans: 2 inches above iliac crest


CR location for a PA projection, taken hourly, for a small bowel series

Ans: iliac crest


What additional projections are taken for a double-contrast barium enema?

Ans: right and left lateral decubitus


What is best demonstrated on a left lateral decubitus for a barium enema?

Ans: air filled right hepatic flexure


What is best demonstrated on a right lateral decubitus for a barium enema?

Ans: air filled left splenic flexure

, 2 | Page
What are the routine projections for a barium enema?

Ans: AP,PA, RAO, LAO, LPO,RPO, lateral rectum, and post-evac


Why are post-evacuation images taken?

Ans: see mucosal patterns and residual barium


CR location for a AP & PA projection barium enema

Ans: iliac crest


Degree of obliquity for a the oblique projections for a barium enema

Ans: 35-45 degrees


CR location for a RAO projection barium enema

Ans: level of iliac crest and 1 inch to the left of the midsagittal plane


CR location for a LAO projection barium enema

Ans: 1-2 inches above iliac crest and 1 inch to the right of the midsagittal plane


CR location for a RPO projection barium enema

Ans: 1-2 inches above iliac crest and 1 inch to the left of the midsagittal plane


CR location for a LPO projection barium enema

Ans: level of iliac crest and 1 inch to the right of the midsagittal plane


RAO and LPO positions for a barium enema demonstrates which flexure?

Ans: right hepatic flexure