. Author manuscript; available in PMC: 2013 Sep 4.

Published in final edited form as: J Ultrasound Med. 2011 Feb;30(2):243–252. doi: 10.7863/jum.2011.30.2.243

Table 4.

Average Computational Costs for Trilinear (TRI), Voxel Nearest Neighbor (VNN), and Distance-Weighted (DW) Interpolation Algorithms When Generating Cross-sectional 2-Dimensional Ultrasound Images Compared With 2 of the Fastest Pixel-Based Algorithms^3,11

Parameter	TRI	VNN	DW	Real-time PNN	Real-time PTL
Time, s	0.035	0.028	1.01	0.033	0.05
Normalized time, ms/1000 pixels	0.46	0.36	13.2	0.43	0.65

Each image had 76,800 pixels to interpolate. PNN indicates pixel nearest neighbor interpolation11; and PTL, pixel trilinear interpolation via alpha blending.¹¹