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- W2033425677 abstract "Previous studies with 1.5 T or 3.0 T magnetic resonance imaging (MRI) have produced mixed results regarding the structural changes of the hippocampus in major depressive disorder (MDD). Subtle region-specific hippocampal tissue changes might be more sensitively detected by measuring the T2* relaxation time (T2*-RT) by ultra-high-field (UHF) MRI, as it provides much higher contrast and sensitivity and consequently greater resolution. We assessed the T2*-RTs of hippocampal sub-regions in 16 MDD patients (9 with recurrent MDD) and 16 control subjects using an UHF 7.0 T MRI system. T2*-RTs of CA1, CA2, CA3, CA4, and subiculum were calculated for both left and right hippocampus. MDD patients had significantly longer T2*-RTs in the right CA1 and subiculum than control subjects. Patients with recurrent MDD had significantly longer T2*-RTs in the right subiculum than those experiencing a first depressive episode, and longer T2*-RTs in the right CA1, CA3, and subiculum than control subjects. Values for T2*-RTs of the right CA3 were significantly correlated with illness duration. In conclusion, we report that T2*-RTs in the right subiculum and CA1 were increased in patients with MDD, especially in cases of recurrent MDD. These findings suggest that region-specific hippocampal damage may be occurring in recurrent depression." @default.
- W2033425677 created "2016-06-24" @default.
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- W2033425677 date "2010-10-01" @default.
- W2033425677 modified "2023-09-27" @default.
- W2033425677 title "Altered T2* relaxation time of the hippocampus in major depressive disorder: Implications of ultra-high field magnetic resonance imaging" @default.
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- W2033425677 doi "https://doi.org/10.1016/j.jpsychires.2010.02.014" @default.
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