Application and comparative analysis of 3.0T MRI and ultrasound in diagnosing CSP after caesarean section

To investigate the effect of 3.0T MRI and ultrasonography in the diagnosis of uterine scar pregnancy (CSP) after caesarean section, and to compare their diagnostic value for CSP.

A retrospective analysis was conducted on 60 patients with CSP treated in our hospital over a period of July 2018 to March 2020. All patients underwent 3.0T MRI, ultrasonography, and surgical termination of pregnancy and pathological analysis. The value of 3.0T MRI and ultrasonography in the diagnosis of CSP was analyzed.

(1) The 60 patients were pathologically analyzed. Among these patients, 2 of whom were trophoblastic diseases, 5 were pregnancy abortion, 8 were cervical pregnancy, and 45 were CSP. (2) The results of ultrasound detection were 37 cases of CSP, 7 cases of misdiagnosis, and 8 cases of missed diagnosis; 3.0T MRI results were 44 cases of CSP, 1 case of misdiagnosis, and 1 case of missed diagnosis. (3) The sensitivity (97.78%), specificity (93.33%), coincidence rate (96.67%), positive diagnosis rate (97.78%), negative diagnosis rate (93.33%), AUC (0.973), and 95% CI (0.914-0.996) of 3.0T MRI in diagnosing CSP were significantly higher than those of ultrasound diagnosis (82.22%, 53.33%, 84.09%, 84.09%, 50%, 0.681, 0.051-0.776) (P<0.05).

The coincidence rate of 3.0T MRI in the diagnosis of CSP after caesarean section is significantly better than that of ultrasound diagnosis, and it can be used to provide reference for clinical diagnosis of CSP after cesarean section.