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Alimentary Positions
Alimentary Landmarks, Specs
| Question | Answer |
|---|---|
| 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
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