Hi Mugundhu
> Dear Experts,
> If there are variations in the flip angle of the image (35 images have
> 8 degrees flip angle and 3 images have 7.5 degrees), will it have any
> impact on VBM analysis?
theoretically the grey matter signal is affected by the flip angle - but
i cannot see this impacting massively VBM
>
> I have another question. The matrix dimension of the image is 1 x 1 x
> 1. After preprocessing the matrix dimension is changed to -1.5 x 1.5 x
> 1.5. Why this negative sign added? IS it flipping of the images
> automatically by software tool?
-1.5 indicate the image is flipped (make sure you used .nii where
converting your dcm data and you do not need to worry much about this)
cyril
--
Dr Cyril Pernet,
Centre for Clinical Brain Sciences (CCBS)
Neuroimaging Sciences
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https://cpernet.github.io/
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