Indications for CT without Contrast

Common indications for CT without contrast include:  Suspected stroke within the first 3 hours of symptom onset; closed head injury; diffuse lung disease; chronic dyspnea; soft-tissue swelling, infection, or trauma of the extremities; suspected kidney stone; and suspected spinal trauma.

Indications for CT with Contrast

Evaluation using contrast-enhanced CT is indicated in the following common scenarios: acute appendicitis, cancer staging, diverticulitis, suspected complications of inflammatory bowel disease, pancreatitis, and suspected pulmonary embolism.

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