Evaluation of radiotherapy setup accuracy for head and neck cancer using a 3-D surface imaging system

被引：9

作者：

Cho, H. -L. ^{[1
]}

Park, E. -T. ^{[1
]}

Kim, J. -Y. ^{[2
]}

Kwak, K. -S. ^{[1
]}

Kim, C. -J. ^{[1
]}

Ahn, K. -J. ^{[1
]}

Suh, T. -S. ^{[3
]}

Lee, Y. -K. ^{[4
]}

Kim, S. -W. ^{[5
]}

Kim, J. -K. ^{[6
]}

Lim, S. ^{[8
]}

Choi, Y. -M. ^{[7
]}

Park, S. -K. ^{[1
]}

机构：

[1] Inje Univ, Busan Paik Hosp, Pusan, South Korea

[2] Inje Univ, Haeundae Paik Hosp, Pusan, South Korea

[3] Catholic Univ, Seoul, South Korea

[4] Inje Univ, Gimhae, Gyeongnam, South Korea

[5] Catholic Univ, Incheon St Marys Hosp, Inchon, South Korea

[6] Dongnam Inst Radiolo Med Sci, Pusan, South Korea

[7] Dong A Univ, Dong A Univ Hosp, Pusan, South Korea

[8] Kosin Univ, Kosin Univ Hosp, Pusan, South Korea

来源：

JOURNAL OF INSTRUMENTATION | 2013年 / 8卷

关键词：

Radiotherapy concepts; Portal imaging; X-ray radiography and digital radiography (DR); PATIENT SETUP; PHANTOM EVALUATION; TUMORS; IRRADIATION; BRAIN;

D O I：

10.1088/1748-0221/8/11/T11002

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The purpose of this study was to measure the accuracy of a three-dimensional surface imaging system (3-D SIS) in comparison to a 3-laser system by analyzing the setup errors obtained from a RANDO Phantom and head and neck cancer patients. The 3-D SIS used for the evaluation of the setup errors was a C-RAD Sentinel. In the phantom study, the OBI setup errors without the thermoplastic mask of the 3-laser system vs. the 3-D SIS were measured. Furthermore, the setup errors with the thermoplastic mask of the 3-laser system vs. the 3-D SIS were measured. After comparison of the CBCT, setup correction about 1mm was performed in a few cases. The probability of the error without the thermoplastic mask exceeding 1mm in the 3-laser system vs. the 3-D SIS was 75.00% vs. 35.00% on the X-axis, 80.00% vs. 40.00% on the Y-axis, and 80.00% vs. 65.00% on the Z-axis. Moreover, the probability of the error with the thermoplastic mask exceeding 1mm in the 3-laser system vs. the 3-D SIS was 70.00% vs. 15.00% on the X-axis, 75.00% vs. 25.00% on the Y-axis, and 70.00% vs. 35.00% on the Z-axis. These results showed that the 3-D SIS has a lower probability of setup error than the 3-laser system for the phantom. For the patients, the setup errors of the 3-laser system vs. the 3-D SIS were measured. The probability of the error exceeding more than 1mm in the 3-laser system vs. the 3-D SIS was shown to be 81.82% vs. 36.36% on the X-axis, 81.82% vs. 45.45% on the Y-axis, and 86.36% vs. 72.73% on the Z-axis. As a result, the 3-D SIS also exhibited a lower probability of setup error for the cancer patients. Therefore, this study confirmed that the 3-D SIS is a promising method for setup verification.

引用

页数：13

共 22 条

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