S. Barthold-Beß

Deutsche Gesellschaft für Medizinische Physik e.V., Heidelburg, Baden-Württemberg, Germany

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Publications (5)

  • M. Schäfer · S. Barthold-Beß · J. Debus · [...] · W. Schlegel
    Article · Dec 2014 · Physica Medica
  • S. Barthold-Beß · I. Niedermaier · G. H. Hartmann · [...] · W. Schlegel
    [Show abstract] [Hide abstract] ABSTRACT: A web-based master study program is presented which is focusing on medical physics in radiotherapy and particularly emphasizing modern treatment techniques like IMRT, IGRT and ion therapy. It is projected as a modular program consisting of online phases based on the “Moodle” software platform, attendance phases, training phases and a master thesis. The master study program is designed for graduates in physics or biomedical engineering with a clear background in medical physics. It will allow postgraduate extra-occupational education and training. Start of the program is planned for autumn 2010. Keywordse-learning-online study master program-medical physics
    Chapter · May 2010
  • [Show abstract] [Hide abstract] ABSTRACT: To analyze the repositioning accuracy in female patients with breast carcinoma, two different setups of an image subtraction system (Positioning System FIVE) were devised using different numbers and alignments of lasers. The applicability of the system was tested for repositioning of the breast in normal volunteers. Horizontal translations as well as breathing related movements in the vertical direction were measured. The mean repositioning accuracy was found to be 2.9 mm for the first setup and 1.5 mm for a second, optimized setup. For this second setup, a gating function was implemented which evaluates the position of the breast twelve times per second. The simulation of a gated treatment showed that the breathing related displacement of the breast can be reduced to 45 70% of the displacement without gating. This implies a significant improvement of the positioning accuracy.
    Article · Dec 2005 · Zeitschrift für Medizinische Physik
  • [Show abstract] [Hide abstract] ABSTRACT: To analyze the repositioning accuracy in female patients with breast carcinoma, two different setups of an image-subtraction system (Positioning System FIVE) were devised using different numbers and alignments of lasers. The applicability of the system was tested for repositioning of the breast in normal volunteers. Horizontal translations as well as breathing-related movements in the vertical direction were measured. The mean repositioning accuracy was found to be 2.9 mm for the first setup and 1.5 mm for a second, optimized setup. For this second setup, a gating function was implemented which evaluates the position of the breast twelve times per second. The simulation of a gated treatment showed that the breathing-related displacement of the breast can be reduced to 45-70% of the displacement without gating. This implies a significant improvement of the positioning accuracy.
    Article · Feb 2005 · Zeitschrift für Medizinische Physik
  • S. Barthold-Beß · G. Echner · G. Hartmann · [...] · W. Schlegel
    [Show abstract] [Hide abstract] ABSTRACT: The objective of this paper is an investigation of the feasibility and applicability of a new 60Co irradiation facility concept. The concept is in particular appropriate for developing countries to provide access to advanced treatment modalities such as conformal radiotherapy (RT) or radiosurgery (RS). A concept for a new irradiation facility has been developed. The concept consists of using a small number of 60Co sources (typically 5-7), mounted on a swivel arc. This system, named CoRA (Cobalt Radiotherapy Arrangement), would be suited for performing both fractionated or conformal RT and RS with simple 60Co technology. The unit is designed as an isocentric device enabling simultaneous irradiation from a number of different directions. If additionally equipped with multi-leaf-collimators (MLCs), the system would be capable of advanced conformal RT techniques. Irradiations of typical indications have been simulated using an in-house treatment planning system. For this purpose typical treatment situations for two different treatment techniques - a fixed beam (RT) and a moving arc technique (RS) - using CoRA were investigated. Results were compared with those for a conventional linear accelerator (Linac) and evaluated using dose volume histograms (DVH). For the fixed beam technique with extracranial lesions it is shown that acceptable dose distributions can be achieved within the planning target volume and the gross tumor volume. For these examples not more than eight angular positions of the swivel arc were used together with irregular field shaping and field weighting. In comparison to the standard Linac treatment plans, only minor differences are obtained for the organs at risk. For the moving arc technique with cranial lesions no significant differences between the moving arc technique and the CoRA arc technique were found. The technical design of the new 60Co therapy facility CoRA and its arc technique provide dose distributions for treatments of cranial and extracranial target volumes that compare well with modern irradiation techniques using Linacs. The concept of the CoRA system and its multifunctional usage could be particularly advantageous for radiation oncology centers in developing countries.
    Article · Jan 2003 · Physica Medica