Experimental measurement of human head motion for high-resolution computed tomography system design

Human head motion has been experimentally measured for high-resolution computed tomography CT design using a Canon digital camera. Our goal is to identify the minimal movements of the human head under ideal conditions without rigid fixation. In our experiments, all the 19 healthy volunteers were lying down with strict self-control. All of them were asked to be calm without pressures. Our results showed that the mean absolute value of the measured translation excursion was about 0.35 mm, which was much less than the measurements on real patients. Furthermore, the head motions in different directions were cor- related. These results are useful for the design of the new instant CT system for in vivo high-resolution imaging about 40 m. © 2010 Society of

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