A Doppler Ultrasound Machine measures blood flow in vessels and the heart. It uses sound waves to assess circulation. It helps detect blocked or narrowed arteries. It evaluates heart valve function. It is non-invasive and painless. It provides real-time imaging. It is commonly used in vascular studies. It helps diagnose deep vein thrombosis. It assesses blood flow abnormalities. It is widely used in cardiology and vascular medicine.