润色：Digital Subtraction Angiography DSA is the gold standard for diagnosing carotid artery disease However as an invasive examination DSA involves radiation and is relatively expensive Moreover it cann

Revised: Digital Subtraction Angiography (DSA) is considered the most reliable method for diagnosing carotid artery disease. However, due to its invasive nature, DSA exposes patients to radiation and can be quite costly. Additionally, it is unable to effectively visualize neovascularization within plaques and small ulcers.