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Alimentary Positions

Alimentary Landmarks, Specs

QuestionAnswer
What position best demonstrates splenic flexure? RPO
Polyps are best demonstrated by what ? A barium enema with air.
Chassard-Lapine Demonstrates rectosigmoid process.
This position demonstrates left half of large bowel. LAO
What position best demonstrates a rectum on a BE study? Lateral
In a lower GI study, what 2 positions will demonstrate barium in body and pylorus? PA, RAO
What position requires a 60-degree angle of patient in a cardiac series. LAO
Where is the CR located on a scout x-ray? L4 - L5
At what body landmark does the esophagus pierce the diaphragm? T10
At what level does the esophagus terminate? T11
What is the length of the colon? 1.5 meters
What is the length of the small intestine? 22 feet (6.5 m)
What is the length of the duodenum? 8 - 10 inches (20-2 cm)
How long is the large intestine? 5 feet (1.5 meters)
How long is the rectum? 6 inches (15 cm)
Esophagus (AP): Where is the CR placed? Perpendicular, at level of T5 - T6
Esophagus (Lateral): Where is CR placed? MCP at level of T5 - T6
Esophagus (PA) RAO: What plane and angle are used for this projection? MSP forms 35 - 40 degree angle
Abdomen (Lateral): Where is CR placed? Horizontal and perpendicular, entering MCP 2" above level of iliac crests.
How far and what direction does the stomach move when the patient is prone? 1.5 - 4 inches superiorly
Stomach & Duodenum (PA Oblique) RAO: Where is the CR placed? Perpendicular, midway between spine and lateral border of abdomen, at the level of L2
Stomach & Duodenum (PA Oblique) RAO: How much is the patient obliqued? 40 - 70 degrees
Stomach & Duodenum (PA Axial): Where is the CR placed? 35 - 45 degrees cephalic
Stomach & Duodenum (Lateral): Where is the CR placed? Perpendicular, midway between midaxillary line and anterior ab at level of L1 (recumbent) or L3 (upright)
Large Intestine (Lateral) - Rectum: Where is the CR placed? Perpendicular, entering MCP at ASIS level
Large Intestine (AP Axial) Butterfly: Where is the CR placed? 30 - 40 degrees cephalic, entering approximately 2" below ASIS level
Large Intestine (AP Axial) Butterfly: What does this view demonstrate? Rectosigmoid area
Large Intestine: AP Oblique (RPO): Where is the CR placed? Perpendicular, entering 1 - 2" lateral to midline of body on elevated side at iliac crests.
Large Intestine (AP Axial) Butterfly: How much is the patient rotated? 35 - 45 degrees
Large Intestine (AP Axial) Butterfly: What structures are shown? Left colic (splenic) flexure, descending colon
Large Intestine (AP Oblique) LPO: What structures are shown? Right colic (hepatic) flexure, ascending and sigmoid portions of colon
Created by: rad1958tech