What is angiography and are there any alternatives for it?

Angiography is a medical imaging procedure used to visualize the inside of blood vessels and organs. It's an X-ray based test that uses a contrast dye to make the arteries and veins more visible on images.

There are alternatives to angiography, but they mostly involve using different types of scans such as CT or MRI scans. However, angiography is considered the gold standard for testing blood vessels and diagnosing any problems with them.