Determining the operative line of resection for image-guided emphysema surgery using a laser scanner and non-rigid registration.
BACKGROUND
Although many diseases such as emphysema are diagnosed with preoperative imaging modalities, this information is rarely utilized in the operating room. A method that relates the preoperative images to the non-rigid organ in physical space would aid a surgeon to determine the line of resection.


METHODS
We used a three-dimensional (3D) laser scanner to obtain intraoperative images of the lung and overlayed it with preoperative CT images, using a non-rigid image registration method.


RESULTS
The non-overlapping registration error of the system was 1.91 +/- 0.28% without organ deformation and 2.69 +/- 0.28% with 9% organ deformation. When 83% of the organ was visible, the registration error was 2.99 +/- 0.42%.


CONCLUSIONS
A novel image overlay system using a 3D laser scanner and a non-rigid registration method was implemented and its accuracy evaluated. By using the proposed system, we successfully related the preoperative images with an open organ in the operating room.
Lee
Jong-Ha
JH
Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA.
Won
Chang-Hee
CH
Marchetti
Nathaniel
N
D000818:Animals; D003952:Diagnostic Imaging / Q000379:methods*; D004646:Emphysema; D006801:Humans; D007834:Lasers; D011656:Pulmonary Emphysema; D025321:Surgery, Computer-Assisted / Q000379:methods*; D013552:Swine