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Table 4 Mean and standard deviation of the co-registration error (shift) for the parameter set obtained before and after calibration

From: Multimodality calibration for simultaneous fluoroscopic and nuclear imaging

  Pinhole distance (cm) 1 2 3 4 5
Mean shift ± σ shiftbefore calibration (cm) 52.4 1.108 ± 0.004 1.416 ± 0.003 0.701 ± 0.003 1.055 ± 0.002 1.644 ± 0.005
58.4 1.127 ± 0.005 1.365 ± 0.005 0.748 ± 0.002 1.103 ± 0.005 1.620 ± 0.004
64.4 1.131 ± 0.002 1.310 ± 0.005 0.778 ± 0.004 1.117 ± 0.002 1.578 ± 0.004
70.4 1.103 ± 0.002 1.233 ± 0.003 0.784 ± 0.005 1.120 ± 0.004 1.499 ± 0.004
76.4 1.083 ± 0.003 1.197 ± 0.005 0.789 ± 0.005 1.096 ± 0.002 1.467 ± 0.005
Mean shift ± σ shiftafter calibration (cm) 52.4 0.160 ± 0.006 0.153 ± 0.006 0.184 ± 0.005 0.150 ± 0.006 0.123 ± 0.005
58.4 0.092 ± 0.005 0.073 ± 0.006 0.082 ± 0.011 0.134 ± 0.005 0.067 ± 0.008
64.4 0.092 ± 0.004 0.098 ± 0.005 0.027 ± 0.007 0.143 ± 0.004 0.093 ± 0.006
70.4 0.171 ± 0.002 0.184 ± 0.006 0.066 ± 0.006 0.175 ± 0.007 0.167 ± 0.005
76.4 0.225 ± 0.006 0.23 ± 0.005 0.136 ± 0.003 0.212 ± 0.008 0.216 ± 0.007
\( \begin{array}{l}\left|{\mathrm{shift}}_{\mathrm{before}}\right.\\ {}\left.-\kern0.5em {\mathrm{shift}}_{\mathrm{after}}\right|\\ {}\kern3em >\\ {}\sqrt[2]{\sigma_{\mathrm{before}}^2+{\sigma}_{\mathrm{after}}^2}\end{array} \) 52.4 Yes Yes Yes Yes Yes
58.4 Yes Yes Yes Yes Yes
64.4 Yes Yes Yes Yes Yes
70.4 Yes Yes Yes Yes Yes
76.4 Yes Yes Yes Yes Yes