T2 blackout effect

Last revised by Daniel J Bell on 24 Jun 2020

T2 blackout effect is a diffusion-weighted imaging phenomenon, representing the reverse of T2 shine through. The 'true' diffusion signal (as determined by ADC values) is reduced on DWI images (e.g. b=1000) by the presence of very low T2 signal (on b=0 images). 

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Cases and figures

  • CT - petechial hemorrhagic infarct
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  • B=0 (T2*)
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  • DWI
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  • ADC
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