20.500.12556/DiRROS-17885 Tertiary collimator system for stereotactic radiosurgery with linear accelerator Tarciarni kolimatorski sistem za stereotaktično radiokirurgijo z linearnim pospeševalnikom In the last decade, stereotactic radiosurgery (SRS) with linear accelerator (linac) has become an important irradiation technique for a variety of malignant and benign intracranial lesions. Although there exist some other radiosurgery techniques, linac based SRS meets the requirements needed for SRSwith low cost modifications. On of the most important additional parts of the equipment is tertiary collimator system which can be attached onto the linac head. We designed and built such system that can be easily fixed onto linac PHILIPS SL - 75/5 with 5 MV photon energy. In our department, we alreadyuse this linac for conventional radiation therapy. Our tertiary collimator system meets all the requirements important for this special modality of radiation therapy. It allows fine centering of the system and has ten various collimators with divergent circular openings having a nominal field diameter ranging from 1.0 cm to 4.0 cm at the isocenter. The accuracy ofthe system was checked by exposing x - ray films at various gantry positions, and recording misalignment of the beams. The width of penumbra was determined using two different dosimetry techniques (film dosimetry and diode measurements). true false true Slovenian Medical Society - Section of Radiology ; Croatian Medical Association - Croatian Society of Radiology Ljubljana Angleški jezik Slovenski jezik by Authors Neznano 2024-01-19 11:01:39 2024-01-19 11:01:39 2024-01-20 03:46:20 0000-00-00 00:00:00 1998 0 0 Life sciences '97 and 2nd Slovenian-Croatian meeting on Molecular oncology today; 1997 Oct 16-19; Gozd Martuljek; BSDOCID37118; str. 125-128 št. 1 Let. 32 1998 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 1998-01-01 617 1318-2099 7653593 RAZ_Casar_Bozidar_1998.pdf RAZ_Casar_Bozidar_1998.pdf 1 F9A7DF7D62E53DA44E5798651638091D 43dbdec68a3c2caca2a4280187d77bae6dc963cf9a4460a54cf8412a60fcb6d1 f00f8951-b6b1-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24252 Onkološki inštitut Ljubljana 0 0 0