PMID- 30385173
OWN - NLM
STAT- MEDLINE
DCOM- 20200303
LR  - 20200303
IS  - 1879-0887 (Electronic)
IS  - 0167-8140 (Linking)
VI  - 132
DP  - 2019 Mar
TI  - Community approach for reducing small field measurement errors: Experience over 
      24 centres.
PG  - 218-222
LID - S0167-8140(18)33524-2 [pii]
LID - 10.1016/j.radonc.2018.10.012 [doi]
AB  - PURPOSE: The complexity of the modern Stereotactic Body Radiation Therapy (SBRT) 
      techniques requires comprehensive quality assurance programs, to ensure the right 
      treatment to the patient. Dosimetry of small radiation fields is a challenge 
      especially for radiotherapy centres starting to work on this issue. The matter to 
      be discussed here concerns the need of detailed measurement procedures and cross 
      checks to be paired to the usual recommendations on detectors and correction 
      factors. MATERIALS AND METHODS: The presented work involved 24 Italian 
      radiotherapy centres, with the specific purpose to minimize systematic errors in 
      output factor measurements over different radiotherapy centres. Using the 
      unshielded silicon diode IBA Razor, reference curves for the relative signal 
      ratio (RSR) as a function of beam size were created for each Linac family. 
      RESULTS: With this study we have demonstrated consistency of small field 
      dosimetry on all the centres involved, moreover all radiotherapy centres using 
      Razor are allowed to compare measurements amongst each other and centres with 
      values deviating more than 5% from the reference curve are advised to repeat 
      their measurements. With this procedure, some critical issues were detected from 
      two centres in RSR measurements, that, if implemented into the own treatment 
      planning system, would induce an unwanted overdosage larger than 5%. CONCLUSIONS: 
      The proposed approach could allow one to envision high-skilled therapy centres 
      providing support to those featuring minor experience and could represent an 
      important strategy for the clinical implementation of emerging technologies at 
      high quality levels. The methodology adopted exploits crowd knowledge methods 
      which could be applied in others areas of radiation dosimetry.
CI  - Copyright (c) 2018 Elsevier B.V. All rights reserved.
FAU - Talamonti, Cinzia
AU  - Talamonti C
AD  - University of Florence, Dept Biomedical Experimental and Clinical Science, "Mario 
      Serio", Medical Physics Unit, AOU Careggi, Florence, Italy. Electronic address: 
      cinzia.talamonti@unifi.it.
FAU - Russo, Serenella
AU  - Russo S
AD  - Medical Physics Unit, Azienda USL Toscana Centro, Florence, Italy.
FAU - Pimpinella, Maria
AU  - Pimpinella M
AD  - Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, ENEA-INMRI C R 
      Casaccia, I-00123 Roma, Italy.
FAU - Falco, Maria Daniela
AU  - Falco MD
AD  - Department of Radiation Oncology "G. D'Annunzio", University of Chieti, SS. 
      Annunziata Hospital, Chieti, Italy.
FAU - Cagni, Elisabetta
AU  - Cagni E
AD  - Medical Physics Unit, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy.
FAU - Pallotta, Stefania
AU  - Pallotta S
AD  - University of Florence, Dept Biomedical Experimental and Clinical Science, "Mario 
      Serio", Medical Physics Unit, AOU Careggi, Florence, Italy.
FAU - Stasi, Michele
AU  - Stasi M
AD  - Medical Physics Department, A.O. Ordine Mauriziano, Turin, Italy.
FAU - Mancosu, Pietro
AU  - Mancosu P
AD  - Medical Physics Unit of Radiation Oncology Dept., Humanitas Clinical and Research 
      Hospital, Milano, Italy.
LA  - eng
PT  - Journal Article
PT  - Multicenter Study
DEP - 20181029
PL  - Ireland
TA  - Radiother Oncol
JT  - Radiotherapy and oncology : journal of the European Society for Therapeutic 
      Radiology and Oncology
JID - 8407192
RN  - Z4152N8IUI (Silicon)
SB  - IM
MH  - Humans
MH  - Particle Accelerators
MH  - Radiometry/instrumentation/*methods/*standards
MH  - Radiosurgery/methods/standards
MH  - Silicon
OTO - NOTNLM
OT  - Crowd knowledge method
OT  - Multicentre evaluation
OT  - Silicon diode detector
OT  - Small field output factor
EDAT- 2018/11/06 06:00
MHDA- 2020/03/04 06:00
CRDT- 2018/11/03 06:00
PHST- 2018/01/07 00:00 [received]
PHST- 2018/08/20 00:00 [revised]
PHST- 2018/10/10 00:00 [accepted]
PHST- 2018/11/06 06:00 [pubmed]
PHST- 2020/03/04 06:00 [medline]
PHST- 2018/11/03 06:00 [entrez]
AID - S0167-8140(18)33524-2 [pii]
AID - 10.1016/j.radonc.2018.10.012 [doi]
PST - ppublish
SO  - Radiother Oncol. 2019 Mar;132:218-222. doi: 10.1016/j.radonc.2018.10.012. Epub 
      2018 Oct 29.