CT-Tutorial

Tutorial code for CT reconstruction with high dynamic range images. See the Landing page for more details.

Conversion of a CT image to a noisy sinogram and reconstruction with noise and without noise.

This notebook is a tutorial on reconstruction of high-dynamic range CT images with proper physical scaling and a realistic noise model.

Outline of processing:

1. Read image: in Hounsfield units (air=0, water=1000)

• Scale so that air=0, water=1
• Mask for circular ROI
• Take the raw sinogram using a specified number of views
• Scale to account for pixel pitch and x-ray density
• Add noise to the sinogram using the correct variance
• Reconstruct from the original and noisy sinogram
• Display the reconstructions and sinograms

See CT_Tutorial.ipynb for more details. The file make_data.ipynb includes code to create high dynamic range images.