Marked tortuosity and calcification of the aorta on a chest x-ray means the aorta (which is the main blood vessel that receives the blood directly from the heart) has many acute bends and has become hardened. The bends and curves in a blood vessel are usually hereditary but the calcification can be a sign of:
1) Elevated cholesterol levels
2) Long-standing elevated blood pressure or blood sugar levels
3) Atherosclerotic fat and plaque accumulations
4) Disease of the aortic heart valve
5) A process of aging
It is best to discuss the probable or possible causes and implications with your healthcare provider.