This project was made as a part of my postgraduate studies in Biomedical Engineering
Context: An interesting project on CT (Computed Tomography) image reconstruction and processing.
In this project are studied the following:
a) the effect of angular sampling (number of projections),
b) the effect of projection sampling,
c) the effect of the reconstruction filter,
d) the effect reconstruction filter cut-off frequency.
Assignments:
• Reading/presentation of two-dimensional cross-sectional image data using a volume normalization function [0,1],
• Extracting sinograms (with fanbeam transformation) for specific values of projections sampling Δr (Sensor Spacing) and angular sampling Δθ (Rotation Increment),
• Use of different projection modification filters (reconstruction filters: Hanning, Hamming, Ram-Lak and Cosine),
• Use of different filter cut-off frequencies with use of the max frequency (frequency scaling % of maximum frequency),
• Use of ifanbeam function for image reconstruction,
• Conclusions and discussion on the results.
Software: Matlab, Octave, Sublime, Libre Office, LibreOffice Calc (Excel)
Methods: Fanbean, iFanbean, CNR, SNR, ESF, LSF, Reconstruction filters
O.S.: Linux-ubuntu
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How to run:
Open MATLAB or Octave and place all files in the same folder. Then run "main.m" file and follow instructions on command line.