@conference {Walsh2014,
	title = {Design of a tracked ultrasound calibration phantom made of LEGO bricks},
	booktitle = {SPIE Medical ImagingMedical Imaging 2014: Image-Guided Procedures, Robotic Interventions, and Modeling},
	volume = {9036},
	year = {2014},
	month = {03/2014},
	pages = {90362C},
	publisher = {SPIE},
	organization = {SPIE},
	address = {San Diego, California, USA},
	doi = {10.1117/12.2043533},
	author = {Ryan Walsh and Marie Soehl and Adam Rankin and Andras Lasso and Gabor Fichtinger}
}
