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[Comment] Diagnosis of pulmonary embolism: progress after many YEARS

In 1964, Sasahara and colleagues1 described the use of selective pulmonary angiography for the diagnosis of pulmonary embolism. 25 years later, the Prospective Investigation of Pulmonary Embolism Diagnosis established criteria for diagnosing acute pulmonary embolism with the use of a non-invasive technique, ventilation-perfusion lung scan.2 The decade that followed marked the increased use of computed tomographic pulmonary angiography (CTPA), which has since been undergoing continuous technological improvement and is now established as the gold standard in pulmonary embolism diagnosis.