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Title:Setup and its effect on safety margin in conformal radiotherapy of the prostate
Authors:ID Kragelj, Borut (Author)
Files:.pdf PDF - Presentation file, download (90,40 KB)
MD5: 1B120FA1F0FC062F1DC7DAB52A0CCFD5
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo OI - Institute of Oncology
Abstract:Background. In radiotherapy, setup errors in positioning the patients influence the size of safety margin and thereby also the size of irradiation field and toxicity of radiotherapy. Methods. The setup errors were calculated by evaluating the deviations from the measured distance between the irradiation field margin and the bony pelvis. Results. The research was performed on 23 patients. With respect to lateral, craniocaudal and anteroposterior axis, the observed systemic error ranged from -5 to + 9 mm, -4to +5 mm, and from -4 to +4 mm, respectively, whereas the observed random error ranged from 0 to 7.5 mm, 0 to 3.6 mm, and from 0 to 4.2 mm, respectively. The safety margin, with the 90% probability to cover clinical target volume (CTV) and allowing for the prostate position variability, measured 9 mm, 9.5 mm, 7 mm, and 10 mm in the respective lateral, craniocaudal, anterior and dorsal direction. Conclusions. Irradiation of the prostate with a 7 mm dorsal safety margin, allowing for 90% coverage probability of CTV, was feasible in 22/23 patients on condition that the grosssystemic error (>3mm) was eliminated.
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2005
Publisher:Association of Radiology and Oncology
Year of publishing:2005
Number of pages:str. 211-217
Numbering:Letn. 39, št. 3
Source:Ljubljana
PID:20.500.12556/DiRROS-18171 New window
UDC:616-006
ISSN on article:1318-2099
COBISS.SI-ID:20249561 New window
Copyright:by Authors
Note:BSDOCID117266;
Publication date in DiRROS:14.02.2024
Views:661
Downloads:153
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KRAGELJ, Borut, 2005, Setup and its effect on safety margin in conformal radiotherapy of the prostate. Radiology and oncology [online]. 2005. Vol. 39, no. 3, p. 211–217. [Accessed 6 April 2025]. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=18171
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Record is a part of a journal

Title:Radiology and oncology
Shortened title:Radiol. oncol.
Publisher:Slovenian Medical Society - Section of Radiology, Croatian Medical Association - Croatian Society of Radiology
ISSN:1318-2099
COBISS.SI-ID:32649472 New window

Secondary language

Language:Slovenian
Title:Napaka nastavitve bolnika in njen vpliv na varnostni rob pri konformnem obsevanju prostate
Abstract:Izhodišča. Napake pri nastavitvi položaja bolnikov med obsevanjem določajo velikost varnostnega roba in s tem tudi velikost obsevalnih polj. Metode. Napako pri nastavitvi bolnikov smo ugotavljali z merjenjem odmikov robov obsevalnega polja od kosti medeničnega obroča. Rezultati. V raziskavo je bilo vključenih 23 bolnikov, pri katerih je bila glede na lateralno, kraniokaudalnoin anteroposteriorno os ugotovljena sistematska napaka od -5 do +9 mm, -4 do +5 mm in -4 do +4 mm ter naključna napaka od 0 do7,5 mm, 0-3,6 mmter 0-4,2 mm. Varnostni rob za 90% verjetnost zajetja kliničnega tarčnega volumna (CTV) z upoštevanjem tudi gibanje prostate je bil 9 mm v lateralni, 9,5 mm v kraniokaudalni, 7 mm v anteriorni in 10 mm v dorzalni smeri. Zaključek. Obsevanje prostate s 7 mm dorzalnim varnostnim robom je možno z odpravo izrazite sistematske napake(>3 mm), pri čemer je dosežena 90% verjetnost zajetja CTV pri 22/23 bolnikov.


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