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jerdra / SDC-BIDS-fMRI_old

Scientific-Compute Working Group Workshop on performing analysis of neuroimaging data in python
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Ep 01 | Affine #7

Closed josephmje closed 5 years ago

josephmje commented 5 years ago
jerdra commented 5 years ago

Idea for tackling this:

Show a 2D slice at some Z-coordinate. Then highlight a pixel saying in image pixels it is in location (x,y,z). Where X,Y are counted from the top left corner of the image. These are measured by "pixels/voxels" in the image.

Then talk about "real coordinates", these are measurements in millimeters inside the scanner. We need a way of going back and forth between "pixel coordinates" and "real world scanner measurements".

Something like that maybe? I think there's diagrams of RAS in scanner cartesian grids somewhere in the interwebs

josephmje commented 5 years ago

Yup I think nibabel has a good image. I was also thinking that talking about the coordinates here could help frame registration really nicely.

On Sun., Jun. 16, 2019, 7:25 p.m. Jerry Jeyachandra, < notifications@github.com> wrote:

Idea for tackling this:

Show a 2D slice at some Z-coordinate. Then highlight a pixel saying in image pixels it is in location (x,y,z). Where X,Y are counted from the top left corner of the image. These are measured by "pixels/voxels" in the image.

Then talk about "real coordinates", these are measurements in millimeters inside the scanner. We need a way of going back and forth between "pixel coordinates" and "real world scanner measurements".

Something like that maybe? I think there's diagrams of RAS in scanner cartesian grids somewhere in the interwebs

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jerdra commented 5 years ago

Yup totally agree, but i don't think we're talking about registration in the course are we?