@conference {Boctor2003,
	title = {Rapid calibration method for registration and 3D tracking of ultrasound images using spatial localizer},
	booktitle = {Medical Imaging 2003: Ultrasonic Imaging and Signal Processing},
	volume = {5035},
	number = {1},
	year = {2003},
	pages = {521-532},
	publisher = {SPIE},
	organization = {SPIE},
	doi = {10 1117/12 479953},
	url = {http://link aip org/link/?PSI/5035/521/1},
	author = {Emad Boctor and Ameet K. Jain and Michael Choti and Russell H. Taylor and Gabor Fichtinger}
}
