There is described a method and a system for generating a non-imaged plane view of an anatomical part for assisting a surgery. A model of the anatomical part is provided, comprising features and dimension parameters. A first plane view of the anatomical part is obtained. Features are identified in the first plane view. The dimension parameters are measured from the features identified. The model is displayed in the non-imaged plane view such that the model is dimensioned with the measured dimension parameters. A position and orientation of a surgical object is then tracked relative to the anatomical part while a user navigates the surgical object in space and a representation of the surgical object to be overlaid in register on at least one the first plane view and/or the non-imaged view is generated.
