PMID- 23089835
OWN - NLM
STAT- MEDLINE
DCOM- 20130723
LR  - 20190911
IS  - 0369-4305 (Print)
IS  - 0369-4305 (Linking)
VI  - 68
IP  - 10
DP  - 2012
TI  - [Quality assurance procedure for assessing mechanical accuracy of a radiation 
      field center in stereotactic radiotherapy].
PG  - 1333-9
AB  - Stereotactic radiotherapy requires a quality assurance (QA) program that ensures 
      the mechanical accuracy of a radiation field center. We have proposed a QA method 
      for achieving the above requirement by conducting the Winston Lutz test using an 
      electronic portal image device (EPID). An action limit was defined as three times 
      the standard deviation. Then, the action limits for mean deviations of the 
      radiation field center during collimator rotation, gantry rotation, and couch 
      rotation in clockwise and counterclockwise resulted in 0.11 mm, 0.52 mm, 0.37 mm, 
      and 0.41 mm respectively. Two years after the QA program was launched, the mean 
      deviation of the radiation field center during gantry rotation exceeded the above 
      action limit. Consequently, a mechanical adjustment for the gantry was performed, 
      thereby restoring the accuracy of the radiation field center. A field center 
      shift of 0.5 mm was also observed after a micro multi-leaf collimator was 
      unmounted.
FAU - Tatsumi, Daisaku
AU  - Tatsumi D
AD  - Department of Radiology, Osaka City University Hospital.
FAU - Ienaga, Akinori
AU  - Ienaga A
FAU - Nakada, Ryosei
AU  - Nakada R
FAU - Yomoda, Akane
AU  - Yomoda A
FAU - Inoue, Makoto
AU  - Inoue M
FAU - Ichida, Takao
AU  - Ichida T
FAU - Hosono, Masako
AU  - Hosono M
LA  - jpn
PT  - English Abstract
PT  - Journal Article
PL  - Japan
TA  - Nihon Hoshasen Gijutsu Gakkai Zasshi
JT  - Nihon Hoshasen Gijutsu Gakkai zasshi
JID - 7505722
SB  - IM
MH  - Quality Assurance, Health Care/*methods
MH  - Radiosurgery/methods/*standards
EDAT- 2012/10/24 06:00
MHDA- 2013/07/24 06:00
CRDT- 2012/10/24 06:00
PHST- 2012/10/24 06:00 [entrez]
PHST- 2012/10/24 06:00 [pubmed]
PHST- 2013/07/24 06:00 [medline]
AID - DN/JST.JSTAGE/jjrt/2012_JSRT_68.10.1333 [pii]
AID - 10.6009/jjrt.2012_jsrt_68.10.1333 [doi]
PST - ppublish
SO  - Nihon Hoshasen Gijutsu Gakkai Zasshi. 2012;68(10):1333-9. doi: 
      10.6009/jjrt.2012_jsrt_68.10.1333.