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

被引：1

作者：

Kamezawa, H. ^{[1
]}

Arimura, H. ^{[2
]}

Arakawa, H. ^{[1
]}

Kameda, N. ^{[3
]}

机构：

[1] Teikyo Univ, Fac Fukuoka Med Technol, Dept Radiol Technol, 6-22 Misaki Machi, Fukuoka, Fukuoka 8368505, Japan

[2] Kyushu Univ, Fac Med Sci, Dept Hlth Sci, Higashi Ku, 3-1-1 Maidashi, Fukuoka, Fukuoka 8128582, Japan

[3] Fujimoto Gen Hosp, Dept Radiol, 17-1 Hayasuzu Cho, Miyakonojo, Miyazaki 8850081, Japan

来源：

RADIATION PROTECTION DOSIMETRY | 2018年 / 181卷 / 04期

基金：

日本学术振兴会;

关键词：

PROSTATE-CANCER; CTDI-INFINITY; IMAGE QUALITY; RADIOTHERAPY; DOSIMETRY; REDUCTION; SYSTEM; CBCT; MM;

D O I：

10.1093/rpd/ncy032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The purpose of this study was to investigate a practical patient dose index for assessing the patient organ dose from a cone-beam computed tomography (CBCT) scan by comparing eight dose indices, i.e. CTDI100, CTDIIEC, CTDI infinity, 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.

引用

页码：333 / 342

页数：10

共 41 条

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AAPM TG 220, 2014, AAPM REP 220, V220, P1

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