Open MRI誘導下脳神経外科手術のためのIntegral Videographyによるイメージオーバーレイナビゲーション

抄録

A three-dimensional (3D) image overlay navigation system has been developed for open MRI-guided glioma surgery. The images are created by employing animated auto-stereoscopic images of integral videography (IV), which provides geometrically accurate 3D images and reproduces motion parallax without using any supplementary glasses or tracking devices. The spatially projected 3D images are superimposed onto the patient and are viewed via a half-slivered mirror. We developed a fast and semiautomatic tumor segmentation method and a spatial image registration method for intra-operative IV image-guided diagnosis and therapy. Two sets of preliminary experiments showed that the total system error was 0.90±0.21 mm in patient-to-image registration, and the procedure time of guiding a needle toward a target was shortened to 24%. The augmented reality of the image overlay system promises to increase the surgical instrument placement accuracy and reduce the procedure time as the result of intuitive 3D viewing.