Table 3.

Calculated volumes of the ITV and lung for the 3 patients.

	Patient 1		Patient 2		Patient 3
Structure	FB	BH	FB	BH	FB	BH
ITV (ml)	344	393	505	437	466	461
Lung (ml)	2,405	3,622	2,166	2,923	1,969	3,560

Abbreviations: BH, breath holding; FB, free breathing; IMRT, intensity-modulated radiation therapy; ITV, internal target volume; PT, proton therapy.