Comparison of Jaw Mode and Field Width for Left-Breast Cancer Using TomoDirect Three-Dimensional Conformal Radiation Therapy: A Phantom Study

Haneul Kim; Jaehong Jung; Hyunseo Jung; Jibeom Jeong; Dohwa Lee; Hyun-Woo Jeong; Youngjin Lee

doi:10.3390/healthcare10122431

Comparison of Jaw Mode and Field Width for Left-Breast Cancer Using TomoDirect Three-Dimensional Conformal Radiation Therapy: A Phantom Study

Healthcare (Basel). 2022 Dec 2;10(12):2431. doi: 10.3390/healthcare10122431.

Authors

Haneul Kim¹, Jaehong Jung², Hyunseo Jung¹, Jibeom Jeong¹, Dohwa Lee¹, Hyun-Woo Jeong³, Youngjin Lee¹

Affiliations

¹ Department of Radiological Science, College of Health Science, Gachon University, 191, Hambakmoero, Yeonsu-gu, Incheon 21936, Republic of Korea.
² Department of Radiation Oncology, College of Medicine, Soonchunhyang University Bucheon Hospital, 170, Jomaruro, Bucheon-si 14584, Republic of Korea.
³ Department of Biomedical Engineering, Eulji University, 553, Sanseong-daero, Sujeong-gu, Seongnam-si 13135, Republic of Korea.

Abstract

It is very important to use effective parameters in the treatment plan of breast cancer patients in TomoDirect (TD)-three-dimensional conformal radiation therapy (TD-3DCRT). The objective of this study was to compare the radiation treatment plans to the parameters (jaw width and jaw mode) of TD-3DCRT for left-breast cancer. This study was conducted using the phantom, the jaw mode (fixed and dynamic) and field width (2.5 cm and 5.0 cm) were controlled to compare the TD-3DCRT treatment plans. There was small difference in the conformity index (CI) and homogeneity index (HI) values for target according to the jaw mode for each field width. As a result of observation in terms of dose, treatment time and unnecessary damage to surrounding normal organs could be minimized when dynamic jaw with a field width of 5.0 cm was used. In conclusion, we verified that the use of dynamic jaws and 5.0 cm field width was effective in left-breast cancer radiotherapy plan using TD-3DCRT.

Keywords: TomoDirect (TD); breast cancer; jaw mode and field width; radiation therapy; three-dimensional conformal radiation therapy (3D-CRT).

Grants and funding

This work was supported by the National Research Foundation funded by the Ministry of Science and ICT, Republic of Korea [grant number NRF2022R1F1A106529311].