In a method and system for planning a brachytherapy treatment, magnetic resonance image data of a patient are acquired by operating a magnetic resonance scanner according to a magnetic resonance sequence that designates an examination volume. An area of the patient is positioned in the examination volume such that the magnetic resonance image data contain at least a part of at least one applicator for the brachytherapy, which is located in the patient. The magnetic resonance sequence includes measurement parameters that lead to a contrast between the at least one applicator and surrounding tissue in the magnetic resonance image data. The position of the at least one applicator in the magnetic resonance image data is extracted, and a radiation treatment plan is created using the extracted position of the at least one applicator.
