La reconstruction itérative en scanner : pourquoi ? Comment ça marche ?

The increase in computing power available to reconstruct CT slices has made it possible to implement new reconstruction methods, capable of surpassing the limitations of the historic filtered back projection. The objective of reducing the dose during CT acquisitions, without degrading the image quality by excessive noise, has been an important motivating factor. The general principles of iterative reconstruction algorithms are explained and illustrated. Knowledge of these principles helps to better understand the potential advantages and disadvantages of using iterative reconstruction.