Návrh a realizace algoritmu pro systém limitního ozařování

Abstract

This thesis describes the implementation of application for effective planning process of CyberKnife system by processing CT images. CyberKnife system, which focuses therapeutic target using two X-ray tubes and takes images of the patient at an angle of 45 degrees, allows localization of lung irradiated tumor bearing based on the difference in density (absorption rate of radiation) between the bearing and the surrounding tissue. Some tumor bearings are difficult to localize due to summation and overlay of monitoring area with other high densities structures (e.g. the spine, arms and ribs). The task of the work was to create images from an angle of 45 degrees with simulated rotation of patient during CT until the overlay is eliminated. The application is designed as a client created in C#, connected to the COM server of computing system MATLAB, which provides most of the calculations. Additional image processing is provided directly in the client, implemented in C#. The application was tested on a single core chip system and speed of acquisition and processing is in average around 1 s. The application was developed, implemented and now successfully tested on the Oncology Clinic at FN Ostrava.