Navigation apparatus and method

A navigation apparatus for assisting navigation of a device through tissue comprises processing circuitry configured to receive volumetric medical imaging data representative of an anatomical region, the anatomical region comprising a region of tissue to be traversed by a device; process the volumetric medical imaging data to identify different types of tissue in the region of tissue; determine a position of the device; and process the volumetric medical imaging data to obtain a virtual endoscopic view of at least part of the region of tissue, the virtual endoscopic view comprising a virtual representation of the device in its determined position; wherein the virtual endoscopic view is rendered such as to visually distinguish the identified different types of tissue, thereby assisting navigation of the device through the region of tissue.