Block diagram of CICS

Multiple Linear Regression and Regularization

Algebraic Reconstruction Technique (ART)

Model-based Iteration

Reconstruction Algorithm

Conjugate Gradient Method

Linear Back-Projection (LBP)

Newton-Raphson Method

Landweber Iteration and Steepest Descent Method

By introducing a weithging vector

Iterative Reconstruction Technique (SIRT)

Optimization

Levenburg-Marquardt Method

By implementing a fixed sensitivity matrix

Direct Method

Based on same equation

Similar but less regularizing

Tikhonov Regularization

Iterative Algorithm

Non-iterative Algorithm

Iterative Tikhonov Method