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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Comput Methods Programs Biomed. 2016 Jan 6;127:290–300. doi: 10.1016/j.cmpb.2015.12.018

Fig. 4.

Fig. 4

Speedup factors for SSTVD implementation of the cost and cost gradient components, comparing the GPU implementation to single-, six-, and twelve-threaded (1 T, 6 T, 12 T) CPU versions. Log scale used for speedup axis. Values shown are averaged for 6 healthy subjects at each of the 8 levels of the image pyramid.