Table 2.
The indications of fetal brain MRI.
| Type | n (%) | ||
|---|---|---|---|
| Ultrasound | Decreased cavum septum pellucidum(< 1 cm) | 32 (11.9) | |
| Discordance between fetal size and GA (< ± 3 SDs) | |||
| Decreased BPD or HC | 110 (41.0) | ||
| Increased BPD or HC | 29 (10.8) | ||
| Increased cerebellomedullary cistern(> 1 cm) | 15 (5.6) | ||
| Unclear vermis | 5 (1.9) | ||
| Cystic structures | |||
| choroid plexus cyst | 9 (3.4) | ||
| cavum velum interpositum/cavum Vergae | 10 (3.7) | ||
| subependymalcysts | 8 (3.0) | ||
| Blake′s pouch | 4 (1.5) | ||
| Agenesis of the corpus callosum | 1 (0.4) | ||
| Ventriculomegaly (within 10–12 mm) | 25 (9.3) | ||
| Subependymal hemorrhage | 3 (1.1) | ||
| Clinic | Old age pregnancy (> 35 years old) | 17 (6.3) | |
GA, gestational age; BPD, biparietal diameter; HC, head circumference.