PMID- 27647595
OWN - NLM
STAT- MEDLINE
DCOM- 20170202
LR  - 20171013
IS  - 0369-4305 (Print)
IS  - 0369-4305 (Linking)
VI  - 72
IP  - 9
DP  - 2016 Sep
TI  - [Evaluation of Size Correction Factor for Size-specific Dose Estimates (SSDE) 
      Calculation].
PG  - 727-34
LID - 10.6009/jjrt.2016_JSRT_72.9.727 [doi]
AB  - American Association of Physicists in Medicine (AAPM) Report No.204 recommends 
      the size-specific dose estimates (SSDE), wherein SSDE=computed tomography dose 
      index-volume (CTDIvol )xsize correction factor (SCF), as an index of the CT dose 
      to consider patient thickness. However, the study on SSDE has not been made yet 
      for area detector CT (ADCT) device such as a 320-row CT scanner. The purpose of 
      this study was to evaluate the SCF values for ADCT by means of a simulation 
      technique to look into the differences in SCF values due to beam width. In the 
      simulation, to construct the geometry of the Aquilion ONE X-ray CT system (120 
      kV), the dose ratio and the effective energies were measured in the cone angle 
      and fan angle directions, and these were incorporated into the simulation code, 
      Electron Gamma Shower Ver.5 (EGS5). By changing the thickness of a PMMA phantom 
      from 8 cm to 40 cm, CTDIvol and SCF were determined. The SCF values for the beam 
      widths in conventional and volume scans were calculated. The differences among 
      the SCF values of conventional, volume scans, and AAPM were up to 23.0%. However, 
      when SCF values were normalized in a phantom of 16 cm diameter, the error tended 
      to decrease for the cases of thin body thickness, such as those of children. It 
      was concluded that even if beam width and device are different, the SCF values 
      recommended by AAPM are useful in clinical situations.
FAU - Mizonobe, Kazufusa
AU  - Mizonobe K
AD  - Department of Radiology and Nuclear Medicine, Sapporo Medical University 
      Hospital.
FAU - Shiraishi, Yuta
AU  - Shiraishi Y
FAU - Nakano, Satoshi
AU  - Nakano S
FAU - Fukuda, Chiaki
AU  - Fukuda C
FAU - Asanuma, Osamu
AU  - Asanuma O
FAU - Harada, Kohei
AU  - Harada K
FAU - Date, Hiroyuki
AU  - Date H
LA  - jpn
PT  - Journal Article
PL  - Japan
TA  - Nihon Hoshasen Gijutsu Gakkai Zasshi
JT  - Nihon Hoshasen Gijutsu Gakkai zasshi
JID - 7505722
SB  - IM
MH  - Monte Carlo Method
MH  - Radiation Dosage
MH  - Technology, Radiologic/*instrumentation/*methods
MH  - Tomography, X-Ray Computed/instrumentation/methods
EDAT- 2016/09/21 06:00
MHDA- 2017/02/06 06:00
CRDT- 2016/09/21 06:00
PHST- 2016/09/21 06:00 [entrez]
PHST- 2016/09/21 06:00 [pubmed]
PHST- 2017/02/06 06:00 [medline]
AID - 10.6009/jjrt.2016_JSRT_72.9.727 [doi]
PST - ppublish
SO  - Nihon Hoshasen Gijutsu Gakkai Zasshi. 2016 Sep;72(9):727-34. doi: 
      10.6009/jjrt.2016_JSRT_72.9.727.