Spiral CT for pulmonary embolism

Radiologic imaging for pulmonary embolism has been problematic. Ventilation perfusion scanning is frequently inconclusive; pulmonary angiography has b een traditionally underused, Now spiral computed tomographic (CT) angiograp hy provides a readily available, noninvasive rest for pulmonary embolism. T he accuracy of this examination is exceedingly high, so it should become th e first-line test for pulmonary embolism. Recent investigations reveal a hi gh negative predictive value for spiral CT, further proving its value. In a ddition, spiral CT provides an alternative diagnosis in a high percentage o f patients. This article reviews current literature regarding the sensitivi ty, specificity, reliability, consistency, and cost-effectiveness of spiral CT.