1. A method for producing an evolvable tissue model of a patient, comprising the steps of: a) receiving at least one set of input data of tissue of a patient, said at least one set of input data containing directional information being derivable therefrom, of at least one tissue component of the tissue; b) representing the directional information of the at least one component of tissue in a pre-selected format and producing therefrom an oriented tissue map which reflects a directionality of the at least one tissue component; and c) producing a tissue model in which at least one constituent of the tissue model is the oriented tissue map such that the tissue model reflects the directionality of the at least one tissue component so that when the tissue model is subjected to an influence that causes tissue transformation over a period of time, the tissue model evolves over the period of time in a manner which reflects a trajectory of the influence interacting with the directionality of the at least one tissue component.