The difference between coronary CTA and angiography

Coronary angiography

(

CTA)

is a non-invasive examination. During the examination, contrast medium should be injected into the venous vessels of the subject with a syringe, and then examined by computer three-dimensional reconstruction technology. Coronary angiography needs to send the contrast tube to the coronary artery opening through the radial artery or femoral artery, and confirm whether there is stenosis in the coronary artery under X-ray