Ultrasound imaging and Doppler flow velocity measurement.

High frequency ultrasound (2-8 MHz typically) has established itself as a major medical imaging method associated with a wide range of clinical applications. Advantages include real-time applicability, lower cost compared with other medical imaging technologies, possibility of measuring blood flow velocities and desk-top instrumentation. Disadvantage is associated with lower image quality than is obtained with x-ray or magnetic resonance methods.