Validation system of MR image overlay and other needle insertion techniques
Fischer, G.S.; Dyer, E.; Csoma, C.; Deguet, A.; Fichtinger, G.
Studies in Health Technology and Informatics 125: 130-135
2007
ISSN/ISBN: 0926-9630 PMID: 17377250 Document Number: 613720
In order to develop accurate and effective augmented reality (AR) systems used in MR and CT guided needle placement procedures, a comparative validation environment is necessary. Clinical equipment is prohibitively expensive and often inadequate for precise measurement. Therefore, we have developed a laboratory validation system for measuring operator performance using different assistance techniques. Electromagnetically tracked needles are registered with the preoperative plan to measure placement accuracy and the insertion path. The validation system provides an independent measure of accuracy that can be applied to varying methods of assistance ranging from augmented reality guidance methods to tracked navigation systems and autonomous robots. In preliminary studies, this validation system is used to evaluate the performance of the image overlay, bi-plane laser guide, and traditional freehand techniques.