The existing reports regarding sexual dimorphism in brain structures are not confluent and generally heterogeneous. MRI instrument-related factor such as field strength is one of the greatest contributors to the brain quantification variability, but its effect on sexual dimorphism in brain structures remains unclear. In this study, we found that due to the image contrast differences arising from differences in field strengths, the sex dimorphism in brain morphology appears to exist dependent of field strengths. It suggests field strength should be considered as one important factor that contributes to the inconsistency in the sex dimorphism in brain across literatures.
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