Computerized Tomography Angiography (CTA)
This is more detailed than X-ray, a CT that uses X-rays and computer technology to produce cross sectional images of the carotid arteries. Images of the brain can be acquired too. With this imaging test, the scan may show areas of damage on the brain. The CT scan uses a low range of radiation.
Cerebral Angiography (Carotid Angiogram)
This procedure is referred to as the gold standard for imaging the carotid arteries. It is an invasive procedure that allows a doctor observe blood flow through the carotid arteries in real time. Cerebral angiography lets the physician see narrowing or blockages on a live X-ray screen as contrast dye in administered in the carotid arteries.
This procedure provides the best information. It is accompanied by a small risk of serious complications.
Conclusion
Just like the arteries that send blood to the heart (coronary arteries), the carotid arteries can have atherosclerosis or hardening of the arteries on the inside of the vessels. With time, the buildup of fatty substances and cholesterol narrows the carotid arteries. This reduces the amount of blood flowing o the brain and increases the risk of having a stroke.
Reference:
[1] https://www.mayoclinic.org/diseases-conditions/heart-attack/symptoms-causes/syc-20373106#:~:text=A%20heart%20attack%20occurs%20when,arteries%2C%20causing%20a%20heart%20attack.
[2] https://www.healthline.com/health/heart-disease/cardiomyopathy
[3] https://www.nhs.uk/conditions/swallowing-problems-dysphagia/#:~:text=Dysphagia%20is%20the%20medical%20term,up%2C%20sometimes%20through%20the%20nose
[4] https://www.webmd.com/brain/aphasia-causes-symptoms-types-treatments
[5] https://www.who.int/news-room/fact-sheets/detail/diabetes
[6] https://www.medicalnewstoday.com/articles/159283