On-line implant reconstruction in HDR brachytherapy

Accurate on-line implant reconstruction using the IBU localiser and dedicated correction algorithms separating the geometric distortion and the magnetic distortion is possible. The results fulfill the minimum requirements as imposed by the Netherlands Commission on Radiation Dosimetry (NCS) without limitations regarding the usable range of the field of view of the image intensifier. However, the C-arm angle is limited to those angles for which magnetic distortion corrections have been obtained.