Adaptation of population-to-Reference template heart model using linear and bilinear interpolation methods. NC5 and NC6 captured the inferior and superior displacements between the Reference and Test volumes [Eq.(1)]. The heart was further divided into upper, middle and lower regions using NC1, NC2, NC3, and NC4. The lateral adjustment of a node in the lower and upper region was determined by NC1, 2 [Eq.(4)] and NC3, 4 [Eq.(2)], respectively, using the linear method. The adjustment of a node in the middle region was calculated from all four NCs using the bilinear method [Eq.(3)].
Ng et al. BMC Medical Physics 2012 12:1 doi:10.1186/1756-6649-12-1