POWER DOPPLER IMAGING - CLINICAL-EXPERIENCE AND CORRELATION WITH COLOR DOPPLER US AND OTHER IMAGING MODALITIES

Power Doppler imaging has recently gained attention as an additional c olor flow imaging technique that overcomes some of the limitations of conventional color Doppler ultrasound (US). Limitations of conventiona l color Doppler US include angle dependence, aliasing, and difficulty in separating background noise from true flow in slow-flow states. Owi ng to its increased sensitivity to flow, power Doppler sonography is v aluable in low-flow states and when optimal Doppler angles cannot be o btained. Longer segments of vessels and more individual vessels can be visualized with power Doppler US than with conventional color Doppler sonography. Power Doppler sonography increases diagnostic confidence when verifying or excluding testicular or ovarian torsion and confirmi ng thrombosis or occlusion of vessels. Power Doppler sonography also i mproves evaluation of parenchymal flow and decreases examination times in technically challenging cases. Power Doppler US is a useful adjunc t to mean-frequency color Doppler sonography, especially when color Do ppler US cannot adequately obtain or display diagnostic information.