Real-time tumor motion monitoring and PTV margin determination in lung SBRT treatment

Figures & data

Figure 1. The differences in TMAs in the SI direction for each fraction and patient: (a) the amplitude difference between TMA_org and TMA_4D and (b) the amplitude difference between TMA_bs and TMA_4D. The error bars are the SDs of amplitude difference over fractions for a patient.

Table 1. The PTV margins calculated for the two groups in the SI, LR and AP directions.

	Group A			Group B
	SI	LR	AP	SI	LR	AP
Baseline corrected scenario	4.2	2.8	3.5	9.6	5.2	3.6
No baseline corrected scenario
Treated in 10 min	4.6	3.5	4.4	12.6	5.9	5.9
Treated in 20 min	4.8	3.8	4.8	13.1	6.0	6.6
Treated in 30 min	4.9	4.0	4.9	13.9	6.1	7.1

Two scenarios with or without baseline correction were considered (mm).