DSA angiography helps detect early vascular abnormalities and accurately identify damaged vascular locations. DSA angiography is currently considered the "gold standard" in diagnostic imaging techniques for vascular diseases.

Digital Subtraction Angiography (DSA) for pulmonary intervention is an angiography method based on the principle of image subtraction through a digital image processor to capture blood circulation, identify pulmonary artery abnormalities and thereby identify common pulmonary artery diseases.

DSA is a diagnostic imaging method that combines X-rays and digital processing. When taking a DSA, the patient must insert instruments into the groin, where bleeding or hematoma may occur. Therefore, during a DSA, the patient must lie still for 24 hours.