TY - GEN
T1 - Real-time image-based guidance method for lung-cancer assessment
AU - Rai, Lav
AU - Merritt, Scott A.
AU - Higgins, William E.
PY - 2006/12/22
Y1 - 2006/12/22
N2 - The assessment of lung cancer involves off-line three-dimensional (3D) computed-tomography (CT) image assessment followed by live bronchoscopy. While standard bronchoscopy provides live video of information inside the lung airways, it does not give any information outside the airways. This results in a low procedure success rate. The success rate can be improved if the physician receives 3D CT-based image guidance. We describe a fast robust method that provides 3D CT-based image guidance during live bronchoscopy. The method enables a continuous registration between the 3D CT image space and the real bronchoscopic video. At a top level, it involves an inter-leaving of continuous video tracking and CT-video fine registration. During video tracking, the bronchoscope's 3D motion is estimated using a point-based 3D-2D pose estimation method. Registration is performed via a warping-based Gauss-Newton method that uses a normalized cross-correlation-based cost for measuring similarity between the bronchoscopic video and CT image data. The method operates at a real-time rate of 10 frames per second, which is over an order of magnitude faster than past approaches. This real-time performance enables live guidance during a procedure. The method is incorporated into a computer-based system for image-guided bronchoscopy and has been applied to human lung-cancer patients. Results are presented for a phantom and lung-cancer patients.
AB - The assessment of lung cancer involves off-line three-dimensional (3D) computed-tomography (CT) image assessment followed by live bronchoscopy. While standard bronchoscopy provides live video of information inside the lung airways, it does not give any information outside the airways. This results in a low procedure success rate. The success rate can be improved if the physician receives 3D CT-based image guidance. We describe a fast robust method that provides 3D CT-based image guidance during live bronchoscopy. The method enables a continuous registration between the 3D CT image space and the real bronchoscopic video. At a top level, it involves an inter-leaving of continuous video tracking and CT-video fine registration. During video tracking, the bronchoscope's 3D motion is estimated using a point-based 3D-2D pose estimation method. Registration is performed via a warping-based Gauss-Newton method that uses a normalized cross-correlation-based cost for measuring similarity between the bronchoscopic video and CT image data. The method operates at a real-time rate of 10 frames per second, which is over an order of magnitude faster than past approaches. This real-time performance enables live guidance during a procedure. The method is incorporated into a computer-based system for image-guided bronchoscopy and has been applied to human lung-cancer patients. Results are presented for a phantom and lung-cancer patients.
UR - http://www.scopus.com/inward/record.url?scp=33845574224&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845574224&partnerID=8YFLogxK
U2 - 10.1109/CVPR.2006.238
DO - 10.1109/CVPR.2006.238
M3 - Conference contribution
AN - SCOPUS:33845574224
SN - 0769525970
SN - 9780769525976
T3 - Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
SP - 2437
EP - 2444
BT - Proceedings - 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, CVPR 2006
T2 - 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, CVPR 2006
Y2 - 17 June 2006 through 22 June 2006
ER -
