Color Doppler ultrasound in diagnosis of placenta accreta

Abstract

Objectives: To evaluate the accuracy of Doppler Ultrasonography in the diagnosis of placenta accreta and to compare it with the diagnostic accuracy of both 2D Ultrasonography and MRI. Method: Prospective study done at Obstetrics & Gynecology Department at Tanta University Hospital, Egypt, the study included 100 patients with suspected placenta accreta based on 2D ultrasonography, color Doppler and MRI. The intraoperative findings of each case were compared with the preoperative imaging findings. Results: Sensitivity for the diagnosis of placenta accreta was 100% for color Doppler ultrasound, 93.7% for 2D ultrasound and 75% for MRI. Specificity was 66.6% for color Doppler, 77.7% for 2D ultrasound and 55.5% for MRI. The highest positive predictive value (PPV) was found in 2D ultrasound (88%), MRI had the lowest PPV (75%), while color Doppler had 84% PPV. Negative predictive value (NPV) was 100%, 87.5%, 55.5% for color Doppler, 2D ultrasound and MRI respectively. Conclusions: Color Doppler Ultrasound is most accurate imaging modality in diagnosis of placenta accreta. Its accuracy, when combined with 2D ultrasound, would increases and provides the best available modality for diagnosis of placenta accreta.