help > problem opening T2 images
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Dec 18, 2017 09:12 PM | Elizabeth Woytowicz
problem opening T2 images
Hi,
Using a Windows 10 computer, when I open any T2 images, the coronal and sagittal views are compressed down to about 1/8th of the size of the axial view. This does not happen with our T1 images or if we open the T2 images on other computers in the lab using earlier versions of Windows. Is there a way to resolve this problem? Any help would be appreciated.
Thank You,
Elizabeth
Using a Windows 10 computer, when I open any T2 images, the coronal and sagittal views are compressed down to about 1/8th of the size of the axial view. This does not happen with our T1 images or if we open the T2 images on other computers in the lab using earlier versions of Windows. Is there a way to resolve this problem? Any help would be appreciated.
Thank You,
Elizabeth
Apr 24, 2018 08:04 PM | Chris Rorden
RE: problem opening T2 images
This reflects your acquisition. Since T2 scans require a long TE
and TR, it was common for them to be acquired with high resolution
in plane, but very thick slices. This reduced the number of slices
required and therefore kept the acquisition time reasonable. In
brief, your images are anisotropic. If you are acquiring new
images, you may want to explore modern sequences like SPACE, which
provide high-resolution isotropic scans in a reasonable time by
exploiting variable flip angles.
If you go to the MRIcron "Preferences" panel, the top two check boxes influence how anisotropic data is loaded: it can either be resliced which provides nicely scaled images but can look very blurry, it can be rotated to the nearest orthogonal, or if neither button is checked the image is displayed as saved on disk.
You may also want to try out MRIcroGL
https://github.com/neurolabusc/MRIcroGL/releases
which scales the images in plane.
Again, this reflects an attribute of your source data, and if the between-slice resolution is too coarse, there may be no suitable way to visualize these images across slices.
If you go to the MRIcron "Preferences" panel, the top two check boxes influence how anisotropic data is loaded: it can either be resliced which provides nicely scaled images but can look very blurry, it can be rotated to the nearest orthogonal, or if neither button is checked the image is displayed as saved on disk.
You may also want to try out MRIcroGL
https://github.com/neurolabusc/MRIcroGL/releases
which scales the images in plane.
Again, this reflects an attribute of your source data, and if the between-slice resolution is too coarse, there may be no suitable way to visualize these images across slices.