THE “GOLD STANDARD” TECHNIQUE FOR THE DIAGNOSIS OF PULMONARY EMBOLUS IS

• A. Ventilation–perfusion scan
• B. Spiral computed tomography angiography
• C. Echocardiography
• D. Pulmonary angiography ✓ 

The “gold standard” technique for the diagnosis of pulmonary embolism is pulmonary angiography. Pulmonary angiography involves the injection of contrast material into the pulmonary arteries to visualize blood flow and detect any blockages caused by a pulmonary embolus. This invasive procedure provides detailed images of the pulmonary vasculature, allowing for accurate diagnosis and localization of the embolus.