GPU accelerated registration of a statistical shape model of the lumbar spine to 3D ultrasound images. - Khallaghi, Siavash; Abolmaesumi, Purang; Gong, Ren Hui; Chen, Elvis C. S.; Gill, Sean; Boisvert, Jonathan; Pichora, David R.; Borschneck, Dan P.; Fichtinger, Gabor; Mousavi, Parvin (2011)