Murphy MJ, Eidens R, Vertatschitsch E, Wright JN
The effect of transponder motion on the accuracy of the calypso electromagnetic localization system. [Journal Article]
Int J Radiat Oncol Biol Phys 2008 Sep 1; 72(1):295-9.
PURPOSE: To determine position and velocity-dependent effects in the overall accuracy of the Calypso Electromagnetic localization system, under conditions that emulate transponder motion during normal free breathing.
METHODS AND MATERIALS: Three localization transponders were mounted on a remote-controlled turntable that could move the transponders along a circular trajectory at speeds up to 3 cm/s. A stationary calibration established the coordinates of multiple points on each transponder's circular path. Position measurements taken while the transponders were in motion at a constant speed were then compared with the stationary coordinates.
RESULTS: No statistically significant changes in the transponder positions in (x,y,z) were detected when the transponders were in motion.
CONCLUSIONS: The accuracy of the localization system is unaffected by transponder motion.
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