Prediction of the onset day using by T2*-weighted magnetic resonance imaging in patients with subarachnoid hemorrhage
Takashi Inoue 1 , Miki Fujimura 2 , Kuniyasu Niizuma 2 , and Teiji Tominaga 2
Neurosurgery, Sendai Medical Center, Sendai,
Tohoku University Graduate School of Medicine, Sendai,
Timing of the onset of subarachnoid hemorrhage (SAH) is
important for treatment decision making, especially as
some patients visit hospital several weeks after the
onset of SAH. T2*-weighted (T2*W) magnetic resonance
(MR) imaging is regarded as a sensitive method for the
detection of deoxyhemoglobin or hemosiderin deposits.
The abnormal low intensity on T2*W imaging gradually
decreased until 90 days from the onset of SAH, but
persisted 16 years after the onset. We could predict the
day of onset with pure error }10 days in patients with
SAH within 90 days of onset, using our grading system
for T2*W images.
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