For Doppler and Duplex Ultrasound Tests we have a term and definition in Vascular Disease.

During a Doppler ultrasound evaluation, a doctor or trained technician uses a special stethoscope to listen for changes in the sound of blood flow; Duplex imaging includes a Doppler evaluation but also uses sound waves bounced off red blood cells to create an image showing the size and shape of a blood vessel and the blood flowing through it.
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