Image Distortion after convert axial CT to sagittal view

I have a CT image (512*512*446)

DICOM info is unfer below

1. Pixel spacing: 0.4648, 0.4648
2. Spacing Between Slices: 0.8
3. SliceThickness: 1

I use squeeze changing tha axial CT to sagittal view, while image distort in the sagittal plane (left).

It should be as same as what I look the sagittal view on Radiant (right).

You can see the vertebral body is elongated in the image.

Is it because of the difference between pixel spacing and slice thickness ?

Or is there any method to avoid this?

Answer 1

[Simon Chan]

The images are not isotropic and hence it is distorted.

Use function imresize after you reconstruct the image from axial to sagittal plane.

J = imresize(I,[446*1/0.4648, 512])

[Jiun Yu Weng]

Thanks a lot !

I get the normal CT now.

[Rik]

Instead of resizing the image, you can also use image directly to set the XData and YData scales separately. It is a bit more work on your part, but you don't run the risk of introducing artifacts in the resizing.