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http://dx.doi.org/10.7742/jksr.2022.16.7.851

Evaluation of Surface Dose for Field-in-Field (FIF) Technique in Breast Radiotherapy  

Il-Hoon, Cho (Department of Biomedical Laboratory Science, Eulji University)
Daehong, Kim (Department of Radiological Science, Eulji University)
Publication Information
Journal of the Korean Society of Radiology / v.16, no.7, 2022 , pp. 851-856 More about this Journal
Abstract
The purpose of this study is to confirm the effect of reducing the surface dose around the radiation field in breast cancer radiotherapy using the Field-in-Field (FIF) technique. X-ray was exposed from a linear accelerator (Linac) was used for irradiation, and the surface dose was measured with a glass dosimeter. The source-to-surface distance (SSD) was 90 cm, the field size is 10 × 10 cm2, and the X-ray energy was 6 MV and 10 MV, respectively. The surface dose of the FIF was compared with the dose measured in the physical wedge (PW) and dynamic wedge (DW). Wedge angles of 15° and 30° were used in the PW and DW, respectively. Surface dose was measured at 1 cm, 3 cm, and 5 cm from the center of the field size, respectively. According to the results, FIF showed lower surface dose compared to PW and DW regardless of the energy of the X-ray beam, wedge angle, and dose measurement point. Since FIF could reduce the radiation dose in periphery of the field size in breast cancer treatment, it is expected to be able to reduce the secondary damage caused by the radiation beam as well as to obtain a uniform dose distribution on the target.
Keywords
Field-in-Field (FIF); Breast cancer; Surface dose;
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