PMID- 30127675
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220318
IS  - 1507-1367 (Print)
IS  - 2083-4640 (Electronic)
IS  - 1507-1367 (Linking)
VI  - 23
IP  - 5
DP  - 2018 Sep-Oct
TI  - Trajectory log file sensitivity: A critical analysis using DVH and EPID.
PG  - 346-359
LID - 10.1016/j.rpor.2018.07.006 [doi]
AB  - AIM: The aim of this study was to investigate the sensitivity of the trajectory 
      log file based quality assurance to detect potential errors such as MLC 
      positioning and gantry positioning by comparing it with EPID measurement using 
      the most commonly used criteria of 3%/3 mm. MATERIALS AND METHODS: An in-house 
      program was used to modified plans using information from log files, which can 
      then be used to recalculate a new dose distribution. The recalculated dose volume 
      histograms (DVH) were compared with the originals to assess differences in target 
      and critical organ dose. The dose according to the differences in DVH was also 
      compared with dosimetry from an electronic portal imaging device. RESULTS: In all 
      organs at risk (OARs) and planning target volumes (PTVs), there was a strong 
      positive linear relationship between MLC positioning and dose error, in both IMRT 
      and VMAT plans. However, gantry positioning errors exhibited little impact in 
      VMAT delivery. For the ten clinical cases, no significant correlations were found 
      between gamma passing rates under the criteria of 3%/3 mm for the composite dose 
      and the mean dose error in DVH (r < 0.3, P > 0.05); however, a significant 
      positive correlation was found between the gamma passing rate of 3%/3 mm (%) 
      averaged over all fields and the mean dose error in the DVH of the VMAT plans 
      (r = 0.59, P < 0.001). CONCLUSIONS: This study has successfully shown the 
      sensitivity of the trajectory log file to detect the impact of systematic MLC 
      errors and random errors in dose delivery and analyzed the correlation of gamma 
      passing rates with DVH.
FAU - Woon, Wui Ann
AU  - Woon WA
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
AD  - Faculty of Science, Universiti Brunei Darussalam, Bandar Seri Begawan BE1410, 
      Brunei Darussalam.
FAU - Ravindran, Paul B
AU  - Ravindran PB
AD  - Faculty of Science, Universiti Brunei Darussalam, Bandar Seri Begawan BE1410, 
      Brunei Darussalam.
AD  - Department of Radiation Oncology, Christian Medical College & Hospital, Vellore 
      632004, India.
FAU - Ekayanake, Piyasiri
AU  - Ekayanake P
AD  - Faculty of Science, Universiti Brunei Darussalam, Bandar Seri Begawan BE1410, 
      Brunei Darussalam.
FAU - Vikraman, Subramani
AU  - Vikraman S
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
FAU - Amirah, Siti
AU  - Amirah S
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
FAU - Lim, Yivonne Y F
AU  - Lim YYF
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
FAU - Vun, Christopher H S
AU  - Vun CHS
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
FAU - Khalid, Jamsari
AU  - Khalid J
AD  - Department of Radiation Oncology, The Brunei Cancer Center, Bandar Seri Begawan 
      BG3122, Brunei Darussalam.
LA  - eng
PT  - Journal Article
DEP - 20180813
PL  - Poland
TA  - Rep Pract Oncol Radiother
JT  - Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer 
      Center in Poznan and Polish Society of Radiation Oncology
JID - 100885761
PMC - PMC6097403
OTO - NOTNLM
OT  - Dose error
OT  - Intensity-modulated radiation therapy
OT  - Multileaf collimator
OT  - Trajectory log files
OT  - Volumetric arc therapy
EDAT- 2018/08/22 06:00
MHDA- 2018/08/22 06:01
PMCR- 2019/09/01
CRDT- 2018/08/22 06:00
PHST- 2017/06/17 00:00 [received]
PHST- 2018/01/27 00:00 [revised]
PHST- 2018/07/23 00:00 [accepted]
PHST- 2018/08/22 06:00 [entrez]
PHST- 2018/08/22 06:00 [pubmed]
PHST- 2018/08/22 06:01 [medline]
PHST- 2019/09/01 00:00 [pmc-release]
AID - S1507-1367(18)30082-8 [pii]
AID - 10.1016/j.rpor.2018.07.006 [doi]
PST - ppublish
SO  - Rep Pract Oncol Radiother. 2018 Sep-Oct;23(5):346-359. doi: 
      10.1016/j.rpor.2018.07.006. Epub 2018 Aug 13.