Intrauterine blood transfusion causes dose- and time-dependent signal alterations in the liver and the spleen on fetal magnetic resonance imaging.

However, for T2-weighted imaging, we found a marked reduction in SI, most profound in temporal proximity to the IUT that then regressed with elapsed time, translating in a highly significant and strong correlation between SI and elapsed days ( r = 0.91, p = 0.002).

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While both correlations were not statistically significant ( p = 0.099 and p = 0.057), a clear trend was observed, and the data was in itself conclusive.

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