CT image reconstruction by back-propagation

A neural network model is used in CT image reconstruction from four projections. The system is based on the backpropagation algorithm for adaptation of connection weights. Satisfactory agreement between the original and reconstructed images was obtained in simulation, and the results obtained are compared to those obtained by the well-known algebraic reconstruction technique (ART), and it was found that the neural network method is more effective than ART when the number of projection directions is very limited.