<http://webisa.webdatacommons.org/226384464>	<http://www.w3.org/ns/prov#value>	"FIG. 5A is a schematic diagram showing how the 3-D model is calibrated to adjust for an accumulated error by comparison of the model with the actual position of the distal end of the flexible endoscope;" .
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<http://webisa.webdatacommons.org/226384464>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .