パワードプラ法

―その原理と特長―

抄録

The power Doppler imaging method displays intensity information of the Doppler signal generated from moving blood, as opposed to conventional color flow imaging, which displays the mean velocity of blood flow.
Compared with conventional color flow imaging, power Doppler imaging has characteristics such as little angle dependence, no aliasing, and less noise. As a consequence, it can evaluate the blood flow dynamics in small branch vessels distributed in many directions. Power Doppler imaging can also detect small vessels with under noisy conditions which make it difficult for color flow imaging.
On the other hand, power Doppler imaging cannot confirm the direction of blood flow because it only displays intensity information, and the degree of reduction is sacrificed for motion artifact.