[The effect of different patient positions on overlapping volumes in radiotherapy of patients with high-risk prostate cancer].

The purpose of the study was to evaluate the relationship among planning target volumes (PTVs) and organs at risk (OARs) based on four different radiotherapy treatment plans for high-risk prostate cancer patients. CT scans were obtained in supine position with knee and ankle support (KAS) and in prone position with belly-board (BB) both with full bladder (FB) and empty bladder (EB). Overlapping volumes of the delineated PTVs and OARs on four different setup combinations (KAS-FB; BB-FB; KAS-EB; BB-EB) were analyzed according to the patient position, bladder filling and circumference of abdomen (CA).

[Computerized radiotherapy planning: retrospective analysis and current methods].

Purpose: To present the development of treatment planning methods at the National Institute of Oncology (NIO) from 1969 till 2005.

Methods: The methods and devices of treatment planning is described chronologically.

Results: First we did the treatment planning with in-house made devices: body contour drawing instrument, simplified anatomical cross sections, treatment planning table for the cross section projection, archives of isodose curves adjusted to body contours, etc.

[Lens-sparing external beam radiotherapy of periocular lymphomas].

Purpose: The presentation of techniques and results of lens-sparing external beam radiotherapy of patients with ophthalmologic lymphomas.

Material And Methods: From 1991 to 2001, at the Department of Radiotherapy of the National Institute of Oncology, Budapest, 92 patients with periocular lymphomas were treated by photon and/or electron beam irradiation depending on the localization. Mean age was 63 years (range: 26-89 years) and the male/female ratio was 1.