Doppler ultrasound and intravenous contrast agents in gastrointestinal tract disorders: current role and future implications.

Doppler sonography is part of the entire sonographic evaluation of intestinal diseases. It can help in estimating disease activity, although as the sole method to assess the patients situation it is not acceptable. New methods to quantify disease activity, such as contrast enhanced sonography, are at an experimental level and have to be evaluated in more detail.