Table 1.

Sample descriptives.

	N	%
Sex
Feminine	1	6.3
Masculine	15	93.8
Number of images analysed
kV	212	64.6
CBCT	116	35.4
Immobilization
Thermoplastic mask	13	81.3
Thorax board	3	18.8
Tumour location
Cervical	3	18.8
Upper thoracic	10	62.5
Mid-thoracic	3	18.8
T staging
T2	2	12.5
T3	9	56.3
T3/4	2	12.5
T4	3	18.8
N staging
Nx	10	62.5
N0	2	12.5
N1	2	12.5
N2	2	12.5
M staging
M0	15	93.8
M1	1	6.3