Fig. 6.

Tool to select the ideal imaging modality for ex vivo diagnostic fetal imaging. MRI with low-field magnets are more suitable for older fetuses from 20 weeks gestation, whereas UHF-MRI and micro-CT are best for fetuses below 16 weeks’ gestation and isolated organs with a maximum tissue diameter below 120 mm due to the small bore size (UHF-MRI) and prolonged staining time (Micro-CT). Older fetuses and tissue samples with larger diameters can still be scanned on selected UHF-MRI devices with larger bore sizes, or by micro-CT after multiple weeks of staining, which delays the autopsy process considerably, making it less suitable in the clinical setting