Towards a large area apparatus for Proton Computed Tomography

Proton Computed Tomography (pCT) is a new imaging method with a potential for increasing accuracy of treatment planning and patient positioning in hadron therapy. A pCT system with small active area (5cm×5cm) has been already manufactured by authors. Tested under proton beams gave first promising results on radiography and tomographic reconstructions. Recent developments of a second prototype with large area (5×20cm
²
) in the perspective of a pre-clinical acquisition system is now being designed, details are given in this paper.