peripartum hysterectomy. The strict etiology is indefinite, but it has been postulated to be correlated to the injury of the decidua basalis, which allows for the placental attack into the myometrium.
Purpose: To evaluate the accuracy of color Doppler ultrasonography in the diagnosis of placenta accreta and to compare it with the diagnostic accuracy of both 2D Ultrasonography and MRI.
Material and Methods: A prospective study was done at Obstetrics and Gynecology Department of 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 %) with color Doppler and (77.7%) for 2D ultrasound and (55.5%) for MRI. The highest positive predictive value (PPV) was found in 2-D 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.
Conclusion: Color Doppler Ultrasound is the most accurate imaging modality in the diagnosis of placenta accreta. Its accuracy, when combined with 2D ultrasound, would increase and provides the best available modality for diagnosis of placenta accreta