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

• Published in: Journal of instrumentation Vol. 8; no. 11; p. T11002
• Main Authors: Cho, H -L, Park, E -T, Kim, J -Y, Kwak, K -S, Kim, C -J, Ahn, K -J, Suh, T -S, Lee, Y -K, Kim, S -W, Kim, J -K, Lim, S, Choi, Y -M, Park, S -K
• Format: Journal Article
• Language: English
• Published: 01.11.2013
• Subjects: Cancer; Error analysis; Errors; Imaging; Masks; Necks; Patients; Thermoplastic resins; Three dimensional
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/8/11/T11002

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. The probability of the error without the thermoplastic mask exceeding 1 mm 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. 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.