Application of 3D/2D image rigid registration algorithm in RT Connect Software

The objective of the study is to describe the application of the image registration algorithm developed in a microservice in the RT Connect software. The experiment was performed using a pelvic phantom.A computed tomography scan of the phantom was performed and a nominal displacement of +30mm was created in the lateral, vertical and longitudinal directions. The registration between the digitally reconstructed radiography (DRR) images and the computed radiography (CR) images resulted in values of displacement of the CR (measured) in relation to the DRR (nominal) of less than 1 mm. The results were promising, but an in-depth investigation is needed to evaluate the full potential of the method.