University Hospital of Freiburg/Clinic for Radiotherapy, Germany
Radiotherapy in the University Hospital of Freiburg
The tradition of radiotherapy in Freiburg dates back to the year 1899. Immediately after its discovery, Röntgen's ideas came to Freiburg due to a personal contact with his student, the physicist Ludwig Zehnder, an external lecturer in the Physics Institute of the University of Freiburg. Röntgen himself refused a chair offered to him by the University of Freiburg in 1895 because the government of Baden was not able to fulfil his requirements for the equipment of the laboratory. So it was Ludwig Zehnder who produced X-ray tubes in Freiburg and was first to make X-ray films in the summer of 1896.
It was in 1910, when the Freiburg gynaecologist Bernhard Krönig was looking for possibilities to use the Röntgenstrahlen and the radiation from radium in medicine. With the physicist Walter Friedrich, a student of Wilhelm Conrad Röntgen, he started a collaboration to investigate the effects of ionizing radiation. Thus Walter Friedrich became Freiburg's first medical physicist.
Krönig and Friedrich knew about the necessity of basic research in this field of radiotherapy and that was the reason for the foundation of the "Radiologisches Institut" in Freiburg in 1914. In this institute Walter Friedrich investigated the fundamental principles of dosimetry.
The problem of the measurement of ionizing radiation was also studied in the Physics Institute of the University of Freiburg by Otto Glasser and by Wilhelm Hammer, the later founder of PTW. Both developed dosemeters with an ionization chamber. In the middle of the 1920s, when Hammer had solved the problem of the transportation of very small ionization currents from the ionization chamber to the meter, Hammer dosemeters became commercially available.
Clinic of Radiotherapy
Nowadays, the Clinic of Radiotherapy is placed in a separate part of the clinic and has on the lowest floor five rooms for patient treatments with external photon and electron radiation. All linacs are equipped with MLCs and electronic portal imaging systems. Two of them are having additionally integrated on board imaging systems for kV-imaging and ConeBeam-CTs, used for IGRT. Brachytherapy is performed using an HDR afterloader; the implantation of sources and catheters is controlled by an integrated brachytherapy kV-imaging system. For the preparation of the treatment there is a CT scanner and a simulator. 3D planning for external radiotherapy and brachytherapy is performed by several treatment planning systems. Further, for intraoperative radiotherapy (IORT) we use a dedicated linac and a HDR-afterloader in a separate operating theatre.
The staff in our clinic consists of radiation oncologists, medical physicists, radiation technologists, dosimetrists, it-service and an engineering group. Basic research on radiobiology is performed in a separate laboratory.
One main focus of the clinic is the 4D high conformal radiotherapy, based on target volumes from CT and molecular imaging devices (PET, PET-CT, MR), followed by calculation of dose-distributions, using adequate algorithms. Precise 3D calculations however are based on a precise dosimetry and tools for routine QA. The QA during the radiotherapy is performed by IGRT and in vivo dosimetry for special treatments.
For this purpose we use equipment coming from PTW together with several inhouse developed and produced tools. Following our main focus, together with PTW new products of the company are tested in our department for the routine application in a sense of high precision radiotherapy.
Contact:
Dr. Gregor Bruggmoser, gregor.bruggmoser[at]uniklinik-freiburg.de, phone +49-(0)761-270-9479
Dr. Norbert Hodapp, norbert.hodapp[at]uniklinik-freiburg.de, phone +49-(0)761-270-9480
Medical Physicists
Universitätsklinikum Freiburg
Klinik für Strahlenheilkunde
Robert-Koch-Str. 3
79106 Freiburg
Germany
