• Contrast injected into the vein, radiation exposure.
• No invasive → vs. Coronary Angiogram / Cath Lab

Diagnostic Validity

• Coronary: 95-98% accuracy for CAD
  • Problem:
    • Need slow HR
    • Cannot work with too much calcification → blooming artifacts
    • Contrast dye can trigger allergy
• Pulmonary:
  • CTPA ⇒ GS for !PE - Pulmonary embolism
• Abdominal: GS for AAA - Abdominal Aortic Aneurysm
• Head: Head & Neck CTA ⇒ Part of !Stroke (CVA) Protocol