Ultrasonographic and clinical indications for prenatal MR imaging
| Indications for MR Imaging | No. |
|---|---|
| Ventricular dilation at US | 34 |
| Midline malformation at US | 20 |
| Posterior fossa anomalies at US | 17 |
| CMV infection | 14 |
| TTTS | 14 |
| Cysts at US | 2 |
| Vascular malformation at US | 2 |
| Brain anomalies in previous pregnancy | 2 |
| Cortical malformations at US | 1 |
| Toxoplasma infection | 1 |
| Polymalformation at US | 1 |
| Brain edema at US | 1 |
Note:—TTTS indicates twin-to-twin transfusion syndrome; CMV, cytomegalovirus.