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Contrast & Positions
Contrast Studies and Positioning - VTT 224
Question | Answer |
---|---|
Appearance of radiopaque contrast? | White |
Appearance of radiolucent contrast? | Black |
What is a survey film? | Radiograph done before any contrast is administered. |
What are the two types of radiopaque (positive) contrast? | Barium sulfate, organic iodides |
How long does it take Barium sulfate to travel the entire GI tract? | 3+ hours, depends on health/age of the patient |
When using both negative and positive contrasts, which is used first? | Negative contrast (Adding negative to positive can cause air bubbles). |
Contrast used for esophagram? | Barium sulfate |
Contrast used for gastrogram? | Barium sulfate |
Contrast used for cystogram? | Organic iodide, air |
Contrast used for urethrogram? | Organic iodide, air |
Contrast used for arthrogram? | Organic iodide |
Contrast used for fistulogram? | Organic iodide |
Contrast used for myelogram? | Organic iodide |
Contrast used for angiogram? | Organic iodide |
Contrast used for excretory urogram? | Organic iodide |
What are some positioning aids? | Troughs, foam wedges, sandbags, tape or ties |
What type of contrast do troughs make? | Radiolucent |
What type of contrast do foam wedges make? | Radiolucent |
What type of contrast do sandbags make? | Radiopaque |
What type of contrast does tape or ties make? | Radiolucent |
Landmarks for lateral thorax radiograph? Center of beam? | Cranial- manubrium. Caudal- between xiphod and last rib. Center of beam- Midway between sternum & spine, level with caudal border of scapula. |
Landmarks for lateral abdomen radiograph? Center of beam? | Cranial- 8-9th intercoastal space. Caudal- greater trochanter of femur. Center of beam- last rib. |
Landmarks for hip & pelvic radiograph? | Wings of the ilium to mid tibia. |
What does OFA stand for? | Orthopedic Foundation for Animals |
What is the OFA? | Voluntary database concerning orthopedic and genetic diseases of animals. |
When taking OFA films, what must be included? | Lead markers, hospital or DVM's name, date taken, pet's registered name or number |
What is the OFA Grading System? | Excellent, Good, Fair, Borderline, Mild, Moderate, Severe |
Number of vertebrae? | Cervical- 7 Thoracis- 13 Lumbar- 7 Sacral- 3 |