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Lower GI Positioning
| 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. |
Which position best demonstrate the hepatic flexure of the colon?
Which of the following barium-filled anatomic structures is best demonstrated in the LAO position? closer to the IR. Therefore, the LAO position will "open up" the splenic flexure, and the RAO will demonstrate the hepatic flexure. The AP oblique positions (RPO and LPO) demonstrate the side farther from the IR.
Which of the following positions will best demonstrate an open the hepatic flexure of the large bowel during a air contrast barium enema?
Lower GI Positioning.
Which of the following positions would the patient be in during the insertion of an enema tip?
Position the patient on left side, lying with the knees drawn to the abdomen (Fig 2). This eases the passage and flow of fluid into the rectum.
Which of the FF position demonstrates the hepatic flexure and adjacent portion of the colon?
The LPO and RAO positions are used to demonstrate the hepatic flexure and ascending colon free of self-superimposition. The distal ileum is well visualized (number 6), as well as the commencement of the large bowel—the cecum (number 4)—and its vermiform appendix (number 5).