PMID- 27444155
OWN - NLM
STAT- MEDLINE
DCOM- 20170227
LR  - 20170227
IS  - 1879-5447 (Electronic)
IS  - 0158-9938 (Linking)
VI  - 39
IP  - 3
DP  - 2016 Sep
TI  - Influence of 320-detector-row volume scanning and AAPM report 111 CT dosimetry 
      metrics on size-specific dose estimate: a Monte Carlo study.
PG  - 697-703
LID - 10.1007/s13246-016-0465-7 [doi]
AB  - The American Association of Physicists in Medicine (AAPM) task group 204 has 
      recommended the use of size-dependent conversion factors to calculate 
      size-specific dose estimate (SSDE) values from volume computed tomography dose 
      index (CTDIvol) values. However, these conversion factors do not consider the 
      effects of 320-detector-row volume computed tomography (CT) examinations or the 
      new CT dosimetry metrics proposed by AAPM task group 111. This study aims to 
      investigate the influence of these examinations and metrics on the conversion 
      factors reported by AAPM task group 204, using Monte Carlo simulations. 
      Simulations were performed modelling a Toshiba Aquilion ONE CT scanner, in order 
      to compute dose values in water for cylindrical phantoms with 8-40-cm diameters 
      at 2-cm intervals for each scanning parameter (tube voltage, bow-tie filter, 
      longitudinal beam width). Then, the conversion factors were obtained by applying 
      exponential regression analysis between the dose values for a given phantom 
      diameter and the phantom diameter combined with various scanning parameters. The 
      conversion factors for each scanning method (helical, axial, or volume scanning) 
      and CT dosimetry method (i.e., the CTDI100 method or the AAPM task group 111 
      method) were in agreement with those reported by AAPM task group 204, within a 
      percentage error of 14.2 % for phantom diameters >/=11.2 cm. The results obtained 
      in this study indicate that the conversion factors previously presented by AAPM 
      task group 204 can be used to provide appropriate SSDE values for 
      320-detector-row volume CT examinations and the CT dosimetry metrics proposed by 
      the AAPM task group 111.
FAU - Haba, Tomonobu
AU  - Haba T
AUID- ORCID: 0000-0002-5257-6162
AD  - Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, 
      Kutsukake-cho, Toyoake, Aichi, Japan. habatomo@fujita-hu.ac.jp.
FAU - Koyama, Shuji
AU  - Koyama S
AD  - Brain & Mind Research Center, Nagoya University, 1-1-20 Daiko-Minami, Higashi-ku, 
      Nagoya, Aichi, Japan.
FAU - Kinomura, Yutaka
AU  - Kinomura Y
AD  - Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, 
      Kutsukake-cho, Toyoake, Aichi, Japan.
FAU - Ida, Yoshihiro
AU  - Ida Y
AD  - Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, 
      Kutsukake-cho, Toyoake, Aichi, Japan.
FAU - Kobayashi, Masanao
AU  - Kobayashi M
AD  - Faculty of Radiological Technology, Fujita Health University, 1-98 Dengakugakubo, 
      Kutsukake-cho, Toyoake, Aichi, Japan.
LA  - eng
PT  - Journal Article
DEP - 20160721
PL  - Netherlands
TA  - Australas Phys Eng Sci Med
JT  - Australasian physical & engineering sciences in medicine
JID - 8208130
SB  - IM
MH  - Computer Simulation
MH  - Dose-Response Relationship, Radiation
MH  - Models, Theoretical
MH  - *Monte Carlo Method
MH  - Phantoms, Imaging
MH  - Radiometry/*methods
MH  - Regression Analysis
MH  - *Societies, Scientific
MH  - Tomography, X-Ray Computed/*instrumentation
OTO - NOTNLM
OT  - 320-detector-row volume CT
OT  - AAPM task group 111
OT  - Monte Carlo simulation
OT  - Size-specific dose estimate
EDAT- 2016/07/23 06:00
MHDA- 2017/02/28 06:00
CRDT- 2016/07/23 06:00
PHST- 2016/02/14 00:00 [received]
PHST- 2016/07/12 00:00 [accepted]
PHST- 2016/07/23 06:00 [entrez]
PHST- 2016/07/23 06:00 [pubmed]
PHST- 2017/02/28 06:00 [medline]
AID - 10.1007/s13246-016-0465-7 [pii]
AID - 10.1007/s13246-016-0465-7 [doi]
PST - ppublish
SO  - Australas Phys Eng Sci Med. 2016 Sep;39(3):697-703. doi: 
      10.1007/s13246-016-0465-7. Epub 2016 Jul 21.