Comparison Of Accelerated Partial Breast Radiation Therapy And External Beam Radiation Therapy By Treatment Planning Indices

Figures & data

Figure 1 Comparison of EBRT and PBI methods.

Table 1 Comparison Of Uniformity Index (UI), Conformity Index (CI), And Homogeneity Index (HI) Between APBI And EBRT Methods For Three Volumes Of The Breast (Sample Size In Each Volume Group Is 8 Patients)

Dosimetric Parameters/Breast Volume	Methods (Mean ± SD)
	APBI	EBRT
UI
< 1000 cc	1.12±0.034	1.10±0.029
1000 cc–1500 cc	1.09±0.018	1.08±0.021
> 1500 cc	1.11±0.049	1.10±0.034
CI
< 1000 cc	0.96±0.022	0.9413±0.022
1000 cc–1500 cc	0.92±0.037	0.88±0.058
> 1500 cc	0.95±0.047	0.89±0.079
HI
< 1000 cc	0.28±0.073	0.26±0.064
1000 cc–1500 cc	0.45±0.15	0.44±0.16
> 1500 cc	0.32±0.10	0.31±0.11
Received dose by heart and lung
< 1000 cc	3.09±2.8	3.28±2.84
1000 cc–1500 cc	6.95±5.12	7.64±5.16
> 1500 cc	5.85±3.4	6.14±3.35

Abbreviations: UI, uniformity index; CI, conformity index; HI, homogeneity index; APBI, accelerated partial breast irradiation; EBRT, external beam radiation therapy.

Table 2 The Correlation Coefficient Between Dosimetric Parameters (UI, HI) And Breast Volume In Two Methods And Significant P Value

Methods/Dosimetric Parameters And Breast Volume	Correlation	Sig.
APBI
UI and volume	0.143	0.505
HI and volume	0.161	0.454
EBRT
UI and volume	0.192	0.369
HI and volume	0.243	0.253

Abbreviations: UI, uniformity index; CI, conformity index; HI, homogeneity index; APBI, accelerated partial breast irradiation; EBRT, external beam radiation therapy.