A NEW APPLICATOR, POSITIONABLE TO THE CENTER OF TRACHEOBRONCHIAL LUMEN FOR HDR-IR-192-AFTERLOADING OF TRACHEOBRONCHIAL TUMORS

A new bronchial applicator for afterloading irradiation is introduced which can be positioned to the center of the tracheobronchial lumen. The central position in the lumen leads to a clear improvement of dose distribution. The applicator is built on the principle of a coaxial tube. Parts of the outer cover can be expanded to baskets and effect a distance of the radiation source from the bronchial mucosa or tumor surface, and at the same time, expend a relief of extreme contact doses. No obstruction of the respiratory system through the positioning device will be caused. The positionable bronchial applicator seems to be suitable for reducing complications caused through high contact doses and irregular dose distributions and may be able to improve the results of endoluminal radiotherapy.