Jan van de Geijn

Publications (2)0 Total impact

• Article: A technique for field matching in primary breast irradiation

  Allen S. Lichter, Benedick A. Fraass, Jan van de Geijn, Thomas N. Padikal
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  ABSTRACT: The intrinsic divergence of photon beams presents serious matching problems in three-field treatment of the breast and the adjoining supraclavicular area. A method is presented in which appropriate beam blocking combined with suitable isocentric rotation of the treatment couch nentralize the affects of divergence so that proper matching is achieved at all depths. The geometric principle and the set-up procedures are discussed and illustrated.
  International Journal of Radiation Oncology*Biology*Physics.
• Article: The imaging revolution and radiation oncology: Use of CT, ultrasound, and nmr for localization, treatment planning and treatment delivery

  Eli Glatstein, Allen S. Lichter, Benedick A. Fraass, Barbara A. Kelly, Jan van de Geijn
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  ABSTRACT: The explosion of new imaging technologies such as X ray computed tomography (CT), ultrasound (US), positron emission tomography (PET), and nuclear magnetic resonance imaging (NMR) has forced a major change in radiation therapy treatment planning philosophy and procedures. Modern computer technology has been wedded to these new imaging modalities, making possible sophisticated radiation therapy treatment planning using both the detailed anatomical and density information that is made available by CT and the other imaging modalities. This has forced a revolution in the way treatments are planned, with the result that actual beam configurations are typically both more complex and more carefully tailored to the desired target volume. This increase in precision and accuracy will presumably improve the results of radiation therapy.
  International Journal of Radiation Oncology*Biology*Physics.