2D/3D Registration with Simultaneous Computation of two-DRRs with H/W Rendering

초록

In this paper, the method which makes pre-operative 3D data useable at intra-operative time is introduced. This method presents a 2D/3D registration method using bi-planar fluoroscopy imaging device and has a fast computation method of DRRs using hardware rendering, texture mapping. Two-DRRs are computed simultaneously, and compared to intra-operative images with intensity information sequentially. After then, the position and orientation of 3D volume in the simulated 2D intra-operative imaging device environment could be found. Through these procedures, we could obtain the data about spatial relationship between 3D pre-operative volume data and 2D intra-operative images. The computation of DRR takes sub second, and the whole procedures for 2D/3D registration take one or two minutes as ROI size, which are far faster than any other methods. Moreover, the image quality of DRRs is improved compare to other methods which are based on software method. To evaluate the result of 2D/3D registration, DRRs are overlap on the real fluoroscopy images, and controlling the opacity property of DRR layer, then we could confirm the target vertebrae is placed on the proper position on the real fluoroscopy image. More accurate studies to find position and orientation of 3D volume in simulated intra-operative imaging device are remained for future work.