[David Shattuck]

What is the resolution of the images you are using?

Usually when this happens it is because the image has not been segmented properly by the preceding steps.

-David Shattuck

[jthompson]

Hello David,

I am having the same issue. My image resolution is:
Dimensions: 512x512x214
Voxel: 0.5×0.5×1 (mm)

Using T1.

What parameters should I adjust (at which stage) to obtain better results?

Thanks!!
John

[stephen.a.thompson@uth.tmc.edu]

I have the same problem – running 15c in Windows 7.

[yeunkim]

Could you try loading up the *pvc.label.nii.gz (label volume of tissue types) file superimposed over your brain image? (Load either the unprocessed brain image or the bias field corrected (*bfc.nii.gz image) as Volume and load *pvc.label.nii.gz file as Label). From here, you can visually check the quality of the tissue segmentation. As you move your cursor around in the images, the bottom bar of your window will tell you which tissue type it has been labeled.

If your image has been poorly segmented, you may want to try editing your brain mask (Skull Stripping) or bias field correction (Nonuniformity Correction) parameters. I hope this helps!

Best,
Yeun

[Author]

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