@JovieL25, when you get settled again, please take a few moments to create a file with the x-y-z coordinates of the centreline of the aorta for one of the CT images. The centreline should follow the aorta up the descending branch, through the arch and down the ascending branch. For the descending and ascending branches, you can just use the centroid. This won't work for the arch. You'll want to approximate the centre line through here. If there isn't a quick way to get it from the data, you could visually read off the centreline coordinates by looking at the images in 3D slicer.
You don't need the data for every slice. I would guess you could have a centroid about every 20 slices or so. As long as interpolating the points together (using splines) will capture the curvature of the centreline.
@inglis-dl has offered to take this file, together with the original image files, to build a simple tool to visualize the transformation to a coordinate system where the aorta will always be roughly circular.
@JovieL25, when you get settled again, please take a few moments to create a file with the x-y-z coordinates of the centreline of the aorta for one of the CT images. The centreline should follow the aorta up the descending branch, through the arch and down the ascending branch. For the descending and ascending branches, you can just use the centroid. This won't work for the arch. You'll want to approximate the centre line through here. If there isn't a quick way to get it from the data, you could visually read off the centreline coordinates by looking at the images in 3D slicer.
You don't need the data for every slice. I would guess you could have a centroid about every 20 slices or so. As long as interpolating the points together (using splines) will capture the curvature of the centreline.
@inglis-dl has offered to take this file, together with the original image files, to build a simple tool to visualize the transformation to a coordinate system where the aorta will always be roughly circular.