Brian S. Furukawa, MD, Nicholas J. Pastis, MD, et al
CHEST
STUDY
Brian S. Furukawa, MD, Nicholas J. Pastis, MD, Nichole T. Tanner, MD, Alexander Chen, MD, Gerard A. Silvestri, MD. Comparing Pulmonary Nodule Location During Electromagnetic Bronchoscopy with Predicted Location Based on Two Virtual Airway Maps at Different Phases of Respiration. Published online: June 16, 2017
OVERVIEW
OBJECTIVE
Determine if an electromagnetic navigation map based on expiration CT scans more accurately predicts actual nodule location vs. a map based on Inspiration only CT scans.
AUTHORS’ CONCLUSION
“Our study demonstrates that the predicted 3D nodule location using an EXP scan for ENB is significantly closer to actual nodule location when compared with an INSP scan. This may partly account for discrepancies between successful navigation and making a diagnosis in some cases as well as the drop off in yields for lower lobe nodules.”
“This study’s finding that predicted pulmonary nodule location during bronchoscopy is better estimated by reformatted images from an EXP scan performed at end-expiration rather than an INSP scan performed during a full inspiratory breath hold is not surprising.”
“The precision of any tracking system depends upon accurate information input and the results of this study suggest than an EXP map may better represent nodule location.”
KEY FINDINGS
Registration | Error Distance |
---|---|
Lumen Registration – vPAD Mean (SD) | 3.0mm (2.4mm) |
Lumen Registration – EXP Scan Mean (SD) | 4.5mm (3.3mm) |
Lumen Registration – INSP Scan Mean (SD) | 14.8mm (9.7mm) |