@conference {Lang2009,
	title = {Fusion of electromagnetic tracking with speckle-tracked 3D freehand ultrasound using an unscented Kalman filter},
	booktitle = {SPIE Medical Imaging 2009: Ultrasonic Imaging and Signal Processing},
	year = {2009},
	author = {Andrew Lang and Parvin Mousavi and Gabor Fichtinger and Purang Abolmaesumi}
}
