Design of the Image-Guided Biopsy Marking System for Gastroscopy

Authors:
Deyu Sun;Weiling Hu;Wei Wu;Jiquan Liu;Huilong Duan;Jianmin Si
Affiliations:
College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China 310027 and Key Laboratory for Biomedical Engineering, Ministry of Education, Hangzhou, China;Laboratory of Digestive Disease, Clinical Institution of Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China 310012;College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China 310027 and Key Laboratory for Biomedical Engineering, Ministry of Education, Hangzhou, China;College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China 310027 and Key Laboratory for Biomedical Engineering, Ministry of Education, Hangzhou, China;College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China 310027 and Key Laboratory for Biomedical Engineering, Ministry of Education, Hangzhou, China;Laboratory of Digestive Disease, Clinical Institution of Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China 310012
Venue:
Journal of Medical Systems
Year:
2012

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Abstract

Endoscopists currently rely on an invasive biopsy tattooing method to identify previously biopsied sites. In order to better guide endoscopists to find the biopsy positions in follow-ups, we proposed a non-invasive image guided biopsy marking system for gastroscopy. Using an electromagnetic tracking device, the position of the gastroscope relative to the stomach was acquired and displayed in the guidance interface. The biopsy positions were recorded in computer for the use of guidance in follow-ups. The accuracy of the system was evaluated by both phantom experiments and in vivo experiments. The average target registration errors on the test animal and the volunteer are 13.4 mm and 11.2 mm respectively. Although the positioning error is slightly larger than current biopsy tattooing method, it satisfies the need for guidance. In the near future, we will validate the system by measuring how much it saves examination time.