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CH 15 LGI Positionin

Lower GI Positioning

QuestionAnswer
What position is recommend as an alternative to a lateral rectum projection during a double contrast BE? Ventral Decubitis
Where is the CR centered for the 15 minute radiograph during a small bowel series? 2 inches above the iliac crest,
Which ionization chambers should be activated for both the PA Small Bowel and AP & Oblique Barium Enema projections? All 3 chambers.
Which positions takne during a Barium Enema will best demonstrate the Right Colic (Hepatic) Flexure? RAO and LPO
How much body rotation is required for oblique Barium Enema projections? 35-45 degrees
Which position taken during a double contrast Barium Enema will produce an air filled image of the Right Colic (Hepatic) Flexure, the Ascending Colon and Cecum? Left Lateral Decubitis
Which aspect of the large intestine is best demonstrated with an AP axial projection? The rectosigmoid region
What is the advantage of performing an AP Axial Oblique projection rather than AP Axial? Creates less superimposition of the Rectosigmoid segments
What is another term for the AP/PA Axial projections? Butterfly projections
What CR angel is required for the AP axial? What CR angel is required for the PA axial? A 30-40 degree cephalad CR angle for the AP axial. a 30-40 degree caudad CR angle for a PA axial.
Which projection during a double contrast BE series best demonstrates the descending colon for possible polyps? Right Lateral Decubitis (Left side up)
What are the basic projections for a Barium Enema? PA/AP, RAO/LAO or RPO/LPO, Right & Left Lateral Cecubitis, Lateral Rectum & PA post evacuation.
For the Decubitis projections, which side of the patient is best demonstrated? The side up.
For the Oblique projections, which side of the patient will demonstrate an "opened up" Colic Flecure? The patient side up will demonstrate the colic flexure on that side. Example: An RPO would demonstrate an opened up Left Colic (Splenic) Flexure.
Created by: jamestkelley
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