Table 1.

Summary of Dice Similarity Coefficient (DSC) and 95% Hausdorff distance (HD) metrics from comparing deep learning-based auto-segmented contours to clinical contours for lung stereotactic ablative radiotherapy planning structures.

Structure	N	Median DSC	Mean DSC (range)	Median 95% HD (mm)	Mean 95% HD (range; mm)
Aorta	81	0.92	0.93 (0.85–0.98)	2.77	2.85 (1.26-5.25)
Esophagus	99	0.82	0.81 (0.64–0.96)	3.15	3.32 (2.05–6.94)
Heart	100	0.95	0.95 (0.87–0.98)	4.48	5.09 (2.54–8.55)
Lung Bilateral	188	0.98	0.98 (0.92–0.99)	2.83	2.99 (1.26–6.73)
Lung Left	93	0.98	0.98 (0.92–0.99)	2.74	2.93 (1.97–6.73)
Lung Right	95	0.98	0.98 (0.96–0.99)	2.91	3.04 (1.26–5.40)
Brachial Plexus	90	0.53	0.52 (0.04–0.81)	6.3	7.08 (2.59–20.75)
Brachial Plexus Left	47	0.53	0.53 (0.17–0.81)	5.95	6.88 (2.74–15.82)
Brachial Plexus Right	43	0.52	0.5 (0.04–0.80)	6.4	7.29 (2.59–20.75)
Proximal Bronchial Tree	100	0.83	0.82 (0.65–0.97)	3.74	4.23 (1.73–7.56)
Spinal Cord	100	0.91	0.9 (0.74–0.98)	1.6	1.62 (0.56–2.69)
Trachea	100	0.92	0.91 (0.79–0.98)	2.25	2.27 (1.09–3.80)
GTV	85	0.74	0.71 (0.19–0.90)	4.48	5.23 (2.04–15.17)

(N, number of validation contours evaluated; GTV, gross tumor volume).