Application of single-image camera calibration for ultrasound augmented laparoscopic visualization

Xinyang Liu; He Su; Sukryool Kang; Timothy D. Kane; Raj Shekhar

doi:10.1117/12.2082194

18 March 2015 Application of single-image camera calibration for ultrasound augmented laparoscopic visualization

Xinyang Liu, He Su, Sukryool Kang, Timothy D. Kane, Raj Shekhar

Author Affiliations +

Proceedings Volume 9415, Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling; 94151T (2015) https://doi.org/10.1117/12.2082194
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

Accurate calibration of laparoscopic cameras is essential for enabling many surgical visualization and navigation technologies such as the ultrasound-augmented visualization system that we have developed for laparoscopic surgery. In addition to accuracy and robustness, there is a practical need for a fast and easy camera calibration method that can be performed on demand in the operating room (OR). Conventional camera calibration methods are not suitable for the OR use because they are lengthy and tedious. They require acquisition of multiple images of a target pattern in its entirety to produce satisfactory result. In this work, we evaluated the performance of a single-image camera calibration tool (rdCalib; Percieve3D, Coimbra, Portugal) featuring automatic detection of corner points in the image, whether partial or complete, of a custom target pattern. Intrinsic camera parameters of a 5-mm and a 10-mm standard Stryker® laparoscopes obtained using rdCalib and the well-accepted OpenCV camera calibration method were compared. Target registration error (TRE) as a measure of camera calibration accuracy for our optical tracking-based AR system was also compared between the two calibration methods. Based on our experiments, the single-image camera calibration yields consistent and accurate results (mean TRE = 1.18 ± 0.35 mm for the 5-mm scope and mean TRE = 1.13 ± 0.32 mm for the 10-mm scope), which are comparable to the results obtained using the OpenCV method with 30 images. The new single-image camera calibration method is promising to be applied to our augmented reality visualization system for laparoscopic surgery.

Citation Download Citation

Xinyang Liu, He Su, Sukryool Kang, Timothy D. Kane, and Raj Shekhar "Application of single-image camera calibration for ultrasound augmented laparoscopic visualization", Proc. SPIE 9415, Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling, 94151T (18 March 2015); https://doi.org/10.1117/12.2082194

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