Geometrical Calibration System for Rotating Bi-Planar Radiography Instrument

Jae-Seong Han, Sang-Hoon Ji, Sang-Moo Lee , Su-Jeong You

There are many image-guiding systems which provide a surgeon with surgical information including location or orientation of tools and bodies such that they helps the surgeon monitor the surgery during the operation. But these image-guiding systems may suffer from imaging distortion due to their mechanical deformations. Therefore, it is needed for the systems to preserve their good localization ability with the calibration process in which the precise radio-projection geometry is determined for X-ray image. But, it is very difficult to reduce deformation error with calibration of the imaging system because of its high complexity of mechanical model. So, in this paper, we suggested a simple calibration method based on a series of laser images, which can be applicable to on-line calibration procedure.