The following publications are possibly variants of this publication:
- Freehand ultrasound calibration: phantom versus tracked pointerMattea Welch, Jennifer Andrea, Tamas Ungi, Gabor Fichtinger. miigp 2013: [doi]
- Reproducibility of freehand calibrations for ultrasound-guided needle navigationSydney Perrin, Zachary Baum, Mark Asselin, Grace Underwood, Saleh Choueib, Hillary Lia, Tamas Ungi, Andras Lasso, Gabor Fichtinger. miigp 2019: [doi]