Acronym

CTPA - CT Pulmonary Angiogram

CT with IV contrast to image pulmonary arteries

Expansion

CT Pulmonary Angiogram

Purpose

Gold standard for diagnosis of pulmonary embolism

Clinical Context

CTPA is contrast-enhanced CT during arterial phase. Excellent for PE detection and risk stratification (central vs peripheral clots).

  • V/Q scan:
  • D-dimer:

Key Points

  • CTPA sensitivity >95% for PE; negative CTPA with low clinical suspicion reliably excludes PE