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

Jie Li
Jie Li
, 
Lin Yang
Lin Yang
, 
Xiaowei Yao
Xiaowei Yao
, 
Linlin Xu
Linlin Xu
, 
Lina Zhao
Lina Zhao
 e 
Fei Bai
Fei Bai
   | 06 gen 2024
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Article Category: Research Article
Pubblicato online: 06 gen 2024
Pagine: 124 - 132
Ricevuto: 16 mag 2023
Accettato: 15 ago 2023
DOI: https://doi.org/10.2478/raon-2024-0001
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© 2024 Jie Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

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)

Styrofoam Bracket
X Y Z X Y Z
Σ Systematic error CROI 1.59 1.99 1.78 2.05 2.10 2.00
SROI 1.23 1.23 1.36 1.32 1.16 1.75
σ Random error CROI 1.47 1.46 1.46 1.39 1.57 1.57
SROI 0.88 1.12 1.26 0.98 1.17 1.54
MPTV CROI 5.01 5.99 5.47 6.10 6.34 6.10
SROI 3.69 3.86 4.28 3.99 3.72 5.45

Comparison of clinical data between the two groups

Group Styrofoam n = 36 Bracket n = 29 P-value
Age (x ± s, years) 48.34 ± 9.58 48.90 ± 10.92 0.837
Affected Side (n, %) 0.565
  Left 20 (55.6) 11 (37.9)
  Right 16 (44.4) 18 (62.1)
Type of operation (n, %) 0.053
  Bcs 7 (16.7) 9 (31)
  Rm 29 (83.3) 20 (69)
Stage (n, %) 0.146
  II 7 (19.4) 4 (13.8)
  III 26 (72.2) 20 (68.9)
  IV 3 (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)

Group Styrofoam Bracket t P-value
CROI (X) 1.59± 1.47 2.05 ± 1.64 2.516 0.012
  (Y) 1.99 ± 1.46 2.10 ± 1.59 0.611 0.541
  (Z) 1.78 ± 1.47 2.00 ± 1.58 1.235 0.218
SROI (X) 1.23 ± 0.88 1.32 ± 1.16 0.620 0.536
  (Y) 1.23 ± 1.21 1.16 ± 1.17 −0.445 0.657
  (Z) 1.36 ± 1.27 1.75 ± 1.55 2.003 0.046
CRTN (°) 0.48 ± 0.46 0.53 ± 0.43 1.033 0.302
SRTN (°) 0.47 ± 0.47 0.66 ± 0.59 2.760 0.006
eISSN:
1581-3207
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Medicine, Clinical Medicine, Internal Medicine, Haematology, Oncology, Radiology
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