TY - JOUR
T1 - Investigation of a practical patient dose index for assessment of patient organ dose from cone-beam computed tomography in radiation therapy using a Monte Carlo simulation
AU - Kamezawa, H.
AU - Arimura, H.
AU - Arakawa, H.
AU - Kameda, N.
N1 - Funding Information:
This research was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP 17K15808.
Publisher Copyright:
© The Author(s) 2018.
PY - 2018/11/1
Y1 - 2018/11/1
N2 - The purpose of this study was to investigate a practical patient dose index for assessing the patient organ dose from a conebeam computed tomography (CBCT) scan by comparing eight dose indices, i.e. CTDI100, CTDIIEC, CTDI∞, midpoint doses f(0)PMMA for a cylindrical polymethyl methacrylate (PMMA) phantom, f(0)Ap for an anthropomorphic phantom and f(0)Pat for a prostate cancer patient, as well as the conventional size specific dose estimations (SSDEconv) and modified SSDE (SSDEmod), with organ dose for the prostate (ODprost) obtained via Monte Carlo (MC) simulation. The ODprost was the reference dose used to find the practical dose index at the center of the pelvic region of a prostate cancer patient. The smallest error rate with respect to the ODprost of 19.3 mGy (reference) among eight dose indices was 5% for f(0)Pat. The practical patient dose index was the f(0)Pat, which showed the smallest error with respect to the reference dose.
AB - The purpose of this study was to investigate a practical patient dose index for assessing the patient organ dose from a conebeam computed tomography (CBCT) scan by comparing eight dose indices, i.e. CTDI100, CTDIIEC, CTDI∞, midpoint doses f(0)PMMA for a cylindrical polymethyl methacrylate (PMMA) phantom, f(0)Ap for an anthropomorphic phantom and f(0)Pat for a prostate cancer patient, as well as the conventional size specific dose estimations (SSDEconv) and modified SSDE (SSDEmod), with organ dose for the prostate (ODprost) obtained via Monte Carlo (MC) simulation. The ODprost was the reference dose used to find the practical dose index at the center of the pelvic region of a prostate cancer patient. The smallest error rate with respect to the ODprost of 19.3 mGy (reference) among eight dose indices was 5% for f(0)Pat. The practical patient dose index was the f(0)Pat, which showed the smallest error with respect to the reference dose.
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U2 - 10.1093/RPD/NCY032
DO - 10.1093/RPD/NCY032
M3 - Article
C2 - 29506291
AN - SCOPUS:85056404209
SN - 0144-8420
VL - 181
SP - 333
EP - 342
JO - Radiation Protection Dosimetry
JF - Radiation Protection Dosimetry
IS - 4
ER -
