What is the role of Doppler ultrasound in the diagnosis of ovarian cancer?

Doppler ultrasound can differentiate between benign and malignant ovarian tumors based on the pattern of blood flow.
The sensitivity and specificity of Doppler ultrasound in distinguishing between benign and malignant ovarian tumors is not well established.
Doppler ultrasound is not useful in the screening of ovarian cancer.
Doppler ultrasound can be useful in the treatment of incidentalomas that appear morphologically benign on transvaginal ultrasound.