A method of generating model data representing a body section of a biological organism, like e.g., a head or part thereof, a joint, or soft tissue, includes the steps of providing object data representing a first portion of the body section, providing standard data representing a complete standard body section, and subjecting the standard data to a registration process, wherein the model data to be generated are created by adapting the standard data to the object data, said model data representing the first portion of the body section and a second portion of the body section.