To provide a method constituted so as to receive an input from an imaging system operator and for reconstituting an image from an imaging data by using an imaging system.

This method comprises a step (100) for forming a first model from the imaging data, a step (106) for receiving a region concerned specified by the operator based on the first model as an input, and a step (122) for forming a second model from the imaging data based on the specified region concerned (102). The method retroactively simplifies the input of parameters for reconstituting the image by using the region concerned inputted by the operator as an input to an automatic parameter selection in the computerized tomographic(CT) method.