This example illustrates the fitting of tri-linear initial volume meshes of the human lung lobes to the data obtained from the visible human anatomical sections to create tri-cubic (Hermite) volume meshes. Data points are projected on to the faces of the volume elements and the face parameters that minimise the sum of the square of the error(Euclidean distance) are determined. Sobelov smoothing is also incorporated as a penalty function to the objective function to control the excessive curvature of arcs and surfaces of the faces. For more details of face fitting see examples 21g and 21h and for the details of theoretical analysis of fitting see Geometric modeling of the human torso using cubic hermite elements, Bradley et. al.

The com file in this example is only for fitting of left upper lobe. For fitting of other lobes use the following com files.

left_lower.com , right_upper.com , right_middle.com , right_lower.com . All necessary input files can be found at the end of this page.

Created by Kumar Mithraratne.

Initial Linear Volume Mesh

Anterior View of Fitted Lobes

Posterior View of Fitted Lobes