Have a personal or library account? Click to login
A retrospective study on improving the accuracy of radiotherapy for patients with breast cancer with lymph node metastasis using Styrofoam Cover

A retrospective study on improving the accuracy of radiotherapy for patients with breast cancer with lymph node metastasis using Styrofoam

Open Access
|Jan 2024

Figures & Tables

FIGURE 1.

Making process of Styrofoam. (A) Glue. (B) Bags. (C) Unformed Styrofoam. (D) Making of molded Styrofoam (Individualized head fixation as well as arm fixation as shown in the red circle)
Making process of Styrofoam. (A) Glue. (B) Bags. (C) Unformed Styrofoam. (D) Making of molded Styrofoam (Individualized head fixation as well as arm fixation as shown in the red circle)

FIGURE 2.

ROI Matching.CROI = chest wall target; SROI = supraclavicular target
ROI Matching.CROI = chest wall target; SROI = supraclavicular target

FIGURE 3.

Bar chart of setup error of two fixation methods in chest wall target area.
Bar chart of setup error of two fixation methods in chest wall target area.

FIGURE 4.

Box plot of setup error in supraclavicular region of two fixation methods.
Box plot of setup error in supraclavicular region of two fixation methods.

FIGURE 5.

Scatter plot of setup error between two groups in different directions. The dark color in the upper figure shows the bracket group, and the light color in the lower figure shows the Styrofoam group. The r-values with P-values < 0.05 are indicated in the figure.C = chest wall; S = supraclavicular
Scatter plot of setup error between two groups in different directions. The dark color in the upper figure shows the bracket group, and the light color in the lower figure shows the Styrofoam group. The r-values with P-values < 0.05 are indicated in the figure.C = chest wall; S = supraclavicular

Target volume expansion boundary in the three-dimensional direction in 65 patients in the breast bracket and Styrofoam groups (mm)

StyrofoamBracket

XYZXYZ
Σ Systematic errorCROI1.591.991.782.052.102.00
SROI1.231.231.361.321.161.75
σ Random errorCROI1.471.461.461.391.571.57
SROI0.881.121.260.981.171.54
MPTVCROI5.015.995.476.106.346.10
SROI3.693.864.283.993.725.45

Comparison of clinical data between the two groups

GroupStyrofoam n = 36Bracket n = 29P-value
Age (x ± s, years)48.34 ± 9.5848.90 ± 10.920.837
Affected Side (n, %) 0.565
  Left20 (55.6)11 (37.9)
  Right16 (44.4)18 (62.1)
Type of operation (n, %) 0.053
  Bcs7 (16.7)9 (31)
  Rm29 (83.3)20 (69)
Stage (n, %) 0.146
  II7 (19.4)4 (13.8)
  III26 (72.2)20 (68.9)
  IV3 (8.4)5 (17.3)

Comparison of setup errors of the two fixation methods in the chest wall target area and supraclavicular target area (mm,`x ± s)

GroupStyrofoamBrackettP-value
CROI (X)1.59± 1.472.05 ± 1.642.5160.012
  (Y)1.99 ± 1.462.10 ± 1.590.6110.541
  (Z)1.78 ± 1.472.00 ± 1.581.2350.218
SROI (X)1.23 ± 0.881.32 ± 1.160.6200.536
  (Y)1.23 ± 1.211.16 ± 1.17−0.4450.657
  (Z)1.36 ± 1.271.75 ± 1.552.0030.046
CRTN (°)0.48 ± 0.460.53 ± 0.431.0330.302
SRTN (°)0.47 ± 0.470.66 ± 0.592.7600.006
DOI: https://doi.org/10.2478/raon-2024-0001 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
Language: English
Page range: 124 - 132
Submitted on: May 16, 2023
Accepted on: Aug 15, 2023
Published on: Jan 6, 2024
Published by: Association of Radiology and Oncology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year

© 2024 Jie Li, Lin Yang, Xiaowei Yao, Linlin Xu, Lina Zhao, Fei Bai, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution 4.0 License.