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Real-time bronchoscope tip localization enables three-dimensional CT image guidance for transbronchial needle
S B Solomon1, P White, D E Acker
1Department of Radiology, School of Medicine, The Johns Hopkins Medical Institutions, Baltimore, MD, USA. ssolomo@welchlink.welch.jhu.edu
Study Objective:
To determine the feasibility of using real-time bronchoscope position technology coupled with previously acquired three-dimensional CT data to enhance transbronchial needle aspiration (TBNA).
Design:
Eight swine were given percutaneously created target lesions for TBNA. A miniature position sensor was placed at the tip of a bronchoscope, and real-time position information during bronchoscopy was presented on a monitor simultaneously displaying previously acquired three-dimensional CT data.
Interventions:
TBNA of target lesions and submucosal ink-spot injection of computer-generated targets.
Measurements And Results:
TBNA specimens revealed successful aspiration of target material. Distances between ink marks made at computer-generated tracheal targets varied, on average (+/- SD), 4.2 mm +/- 2.6 mm from predetermined computer-distance coordinates.
Conclusion:
Real-time bronchoscope position technology coupled with previously acquired CT images may aid with TBNA of nonvisible extrabronchial lesions.