PIOPED is an acronym that is typically used in medical settings. It stands for "Prospective Investigation of Pulmonary Embolism Diagnosis". However, there are several synonyms for PIOPED that are often used. Some of the common alternatives to PIOPED include pulmonary embolism investigation, pulmonary embolism diagnosis, and prospective study of pulmonary embolism. Other synonyms include pulmonary embolism detection, pulmonary embolism evaluation, and pulmonary embolism screening. Ultimately, these terms all refer to the same medical investigation into diagnosing and treating pulmonary embolisms, which are serious medical conditions that can pose a significant risk to a patient's health and well-being.