PMID- 29265684
OWN - NLM
STAT- MEDLINE
DCOM- 20180817
LR  - 20181113
IS  - 1526-9914 (Electronic)
IS  - 1526-9914 (Linking)
VI  - 19
IP  - 1
DP  - 2018 Jan
TI  - Investigation of the radiation dose from cone-beam CT for image-guided 
      radiotherapy: A comparison of methodologies.
PG  - 174-183
LID - 10.1002/acm2.12239 [doi]
AB  - Four methodologies were evaluated for quantifying kilovoltage cone-beam computed 
      tomography (CBCT) dose: the Cone-Beam Dose Index (CBDI), IAEA Report 5 
      recommended methodology (IAEA), the AAPM Task Group 111 methodology (TG111), and 
      the current dose metric; the Computed Tomography Dose Index (CTDI) on two 
      commercial Varian cone-beam CT imaging systems; the Clinac iX On-Board Imager 
      (OBI); and the TrueBeam X-ray Imaging system (XI). The TG111 methodology measured 
      the highest overall dose (21.199 +/- 0.035 mGy OBI and 22.420 +/- 0.002 XI for pelvis 
      imaging) due to the full scatter of the TG111 phantom and was within 5% of CTDI 
      measurements taken using a full scatter TG111 phantom and 30-cm film strips. CBDI 
      measured the second highest overall dose, within 10% of the TG111, with IAEA 
      measuring the third highest dose. For head CBCT protocols, CBDI measured the 
      highest dose, followed by IAEA. The CTDI method measured lowest across all scan 
      modes highlighting its limitations for CBCT dosimetry. The XI imaging system 
      delivered lower doses for head and thorax scan modes and similar doses to the OBI 
      system for pelvis scan modes due to additional beam hardening filtration in the 
      XI system. The TG111 method measured the highest dose in the center of a CBCT 
      scan during image guidance procedures; however, CBDI provided a good 
      approximation to TG111 with existing CTDI equipment and may be more applicable 
      clinically.
CI  - (c) 2017 The Authors. Journal of Applied Clinical Medical Physics published by 
      Wiley Periodicals, Inc. on behalf of American Association of Physicists in 
      Medicine.
FAU - Buckley, Jarryd G
AU  - Buckley JG
AD  - School of Physics, Centre for Medical and Radiation Physics, University of 
      Wollongong, Wollongong, Australia.
FAU - Wilkinson, Dean
AU  - Wilkinson D
AD  - Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, Australia.
FAU - Malaroda, Alessandra
AU  - Malaroda A
AD  - School of Physics, Centre for Medical and Radiation Physics, University of 
      Wollongong, Wollongong, Australia.
FAU - Metcalfe, Peter
AU  - Metcalfe P
AD  - School of Physics, Centre for Medical and Radiation Physics, University of 
      Wollongong, Wollongong, Australia.
LA  - eng
PT  - Comparative Study
PT  - Journal Article
DEP - 20171219
PL  - United States
TA  - J Appl Clin Med Phys
JT  - Journal of applied clinical medical physics
JID - 101089176
SB  - IM
MH  - Cone-Beam Computed Tomography/*methods
MH  - Head/diagnostic imaging
MH  - Humans
MH  - Image Processing, Computer-Assisted/methods
MH  - Neoplasms/*radiotherapy
MH  - Organs at Risk/radiation effects
MH  - Pelvis/diagnostic imaging
MH  - *Phantoms, Imaging
MH  - Radiography, Thoracic
MH  - Radiotherapy Dosage
MH  - Radiotherapy Planning, Computer-Assisted/*methods
MH  - Radiotherapy, Image-Guided/*methods
MH  - Radiotherapy, Intensity-Modulated/*methods
PMC - PMC5768018
OTO - NOTNLM
OT  - computed tomography dose index
OT  - cone beam computed tomography
OT  - gafchromic film
OT  - image guided radiotherapy
OT  - radiotherapy
EDAT- 2017/12/22 06:00
MHDA- 2018/08/18 06:00
PMCR- 2017/12/19
CRDT- 2017/12/22 06:00
PHST- 2017/09/21 00:00 [received]
PHST- 2017/10/31 00:00 [revised]
PHST- 2017/11/03 00:00 [accepted]
PHST- 2017/12/22 06:00 [pubmed]
PHST- 2018/08/18 06:00 [medline]
PHST- 2017/12/22 06:00 [entrez]
PHST- 2017/12/19 00:00 [pmc-release]
AID - ACM212239 [pii]
AID - 10.1002/acm2.12239 [doi]
PST - ppublish
SO  - J Appl Clin Med Phys. 2018 Jan;19(1):174-183. doi: 10.1002/acm2.12239. Epub 2017 
      Dec 19.