@conference {Gill2009,
	title = {Group-wise Registration of Ultrasound to CT Images of Human Vertebrae},
	booktitle = {SPIE Medical Imaging 2009: Visualization, Image-Guided Procedures, and Modeling},
	volume = {7261},
	year = {2009},
	pages = {na},
	author = {Sean Gill and Parvin Mousavi and Gabor Fichtinger and David R Pichora and Purang Abolmaesumi}
}
