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CT Pulmonary Angiography
Aka: CT Pulmonary Angiography, Pulmonary Artery CTA, Pulmonary Artery CT Angiogram, CT Angiogram for Pulmonary Embolism
- See Also
- Pulmonary Embolism Diagnosis
- Indications
- Pulmonary Embolism Evaluation
- Efficacy
- Test Sensitivity: 86% for central emboli
- Test Sensitivity: 63% for subsegmental vessels
- Precautions: Factors that degrade CT Quality (lower sensitivity)
- Increased Respiratory Rate
- Hides small basilar pulmonary emboli
- Obesity
- Obscures general pulmonary vasculature
- Decreased Cardiac Output
- Disadvantages
- Difficult to use if patient severely dyspneic
- Patient must hold breath for 15 to 30 seconds
- Misses small peripheral emboli
- However these may be clinically insignificant