Evaluation of the quality of images obtained on a cone beam computed tomograph

Radiosurgical treatment with the Leksell Gamma Knife is considered the standard of modern neuroradiosurgery due to the high accuracy of irradiation and extensive clinical experience gained over more than 50 years of practical use of the Gamma knife. One of the latest models of the Leksell Gamma Knife Icon installation uses cone beam computed tomography (CBCT). CBCT is one of the methods of target positioning. Based on tomograms, a stereotactic coordinate system is introduced, in which the position of the target is determined. Scanning using this method allows you to determine the current position of the target object and adjacent brain structures relative to the coordinate system of the stereotactic apparatus. The resulting images are combined with a previously performed CT or MRI scan. The purpose of this work is to evaluate the quality and stability of CBCT images. The results obtained correspond to the declared technical characteristics.