Detection of systematic errors in external radiotherapy before treatment delivery

Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
R CalandrinoP Signorotto

Abstract

The execution of an independent control of monitor units (MU) and dose distribution calculation, together with a check of the data reported in the treatment chart is an effective tool in strongly reducing the occurrence of systematic errors before treatment delivery. In this paper we report the results of the analysis of 6272 controls (about 5000 patients) registered over more than 5 years; 70 serious errors (producing a deviation larger than 5% from the prescribed daily dose) and 147 minor errors were detected and corrected before the start of the treatment. The error rate was found to be strongly operator-dependent (serious error rate ranging from 0.3 to 2.5% when considering different operators). A time-trend analysis showed a significant reduction of serious errors, i.e. 1.5% in the period from September 1991 to April 1994 compared to 0.9% in the period from April 1994 to November 1996. However, even if the double check was highly effective in revealing human errors, three serious systematic errors (errors occurring during the calculation/planning/transcription phases) escaped the control and were detected by diode in vivo dosimetry during the period October 1994 to November 1996 (in 650 patients controlled).

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Citations

Jun 28, 2000·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·C FiorinoR Calandrino
Dec 2, 1999·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·P MangiliR Calandrino
Feb 25, 1999·International Journal of Radiation Oncology, Biology, Physics·M Essers, B J Mijnheer
Mar 24, 2011·AJR. American Journal of Roentgenology·Ellen YorkeEric Ford
Apr 6, 2013·Medical Physics·Yuichi AkinoIndra J Das
Nov 20, 2010·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Joanne CunninghamOla Holmberg
Jul 6, 2010·International Journal of Radiation Oncology, Biology, Physics·Anthony ArnoldMichael Barton
Oct 12, 2010·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Stephen L Breen, Beibei Zhang
Apr 20, 2010·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Brenda G ClarkLaval Grimard
Jan 15, 2014·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Paweł WołowiecKrzysztof Lis
Nov 24, 2007·International Journal of Radiation Oncology, Biology, Physics·Lawrence B MarksFang Fang Yin
Mar 29, 2014·Practical Radiation Oncology·Brenda G ClarkPeter Dunscombe
Dec 3, 2014·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Antonio L DamatoRobert A Cormack
Jan 1, 2012·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Marta Bogusz-Czerniewicz, Daniel Kaźmierczak
Feb 17, 2017·The British Journal of Radiology·Niall D MacDougallAndrew Morgan
Aug 15, 2008·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Alessio G MorgantiVincenzo Valentini
Feb 9, 2018·Medical Physics·Eric C Ford, Suzanne B Evans
Oct 24, 2007·Physics in Medicine and Biology·Fatemeh AzmandianSteve B Jiang
May 16, 2018·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·Stuart GreenhamThomas P Shakespeare

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