Brachytherapy system and method

The brachytherapy system as defined in claim 11, wherein the image generation unit is configured to determine an orientation of the applicator within the image from the marked points, and wherein the image generation unit is configured to align the image of the body region and the model of the applicator such that said marked predetermined point of the applicator and the corresponding point of the model are arranged at the same position and that an orientation vector of the model is aligned with the determined orientation.

A method for operating a brachytherapy system for supporting the application of radiation to a body region of a patient body, the brachytherapy system cooperating with an applicator configured for fixating at least one radiation source in the body region and comprising an ultrasound device configured for acquiring a three-dimensional image of the body region including the applicator and an image generation unit including a pre-stored three-dimensional model of the applicator, the method comprising:

• the image generation unit obtaining position information relating the applicator on the basis of the three-dimensional image of the body region, and
• the image generation unit aligning the three-dimensional image of the body region and the pre-stored three-dimensional model of the applicator on the basis of the position information.