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Evaluation of fetal MRI in a South African referral centre
Abstract
Background. The Department of Radiology at Groote Schuur Hospital, Cape Town, South Africa, has been performing fetal magnetic resonance imaging (MRI) since 2007. Fetal MRI findings have not previously been analysed to correlate them with antenatal and postnatal findings.
Objectives. To determine the most common indication for fetal MRI, and to correlate antenatal MRI with antenatal ultrasound (US), postnatal imaging and postmortem findings.
Methods. This was a retrospective study of imaging carried out between January 2006 and December 2011. Seventy fetal MRI cases with complete antenatal and postnatal medical records were included. Antenatal US and antenatal MRI were compared, and also compared with the postnatal imaging findings. Stata 12 was used to analyse the data, and Spearman’s test to test the agreement between the results.
Results. Intracranial pathology was the most common indication for fetal MRI, with ventriculomegaly being the commonest indication determined from prenatal US. There was 72% agreement between antenatal US and fetal MRI. Postnatal findings showed 28% agreement with antenatal US and 39% agreement with fetal MRI.
Conclusions. Intracranial pathology was the major indication for fetal MRI. There was good agreement between prenatal US and fetal MRI but poor agreement between antenatal and postnatal findings, largely as a result of resolution of ventriculomegaly.
