Skip to main content

Table 1 SPICE version 1, 2 and 3 against STAPLE for definition of parotid and submandibular glands; mean/median values shown

From: Evaluation of an automatic segmentation algorithm for definition of head and neck organs at risk

SPICE contours n = 20

DSC

mean DTA (mm)

max DTA (mm)

Parotid Glands

   

1

0.77/0.79

2.2/1.9

19.0/17.4

2

0.78/0.79

1.6/1.5

14.7/14.8

3

0.72/0.75

3.3/2.5

21.5/19.8

Submandibular Glands

   

1

0.70/0.80

1.5/0.6

7.2/5.7

2

0.67/0.78

2.0/0.4

8.2/5.6

3

0.64/0.68

3.0/1.0

11.4/8.0

  1. Abbreviations: DSC Dice similarity coefficient, DTA distance to agreement, max maximum, mm millimetres, n number of SPICE 1, 2 or 3 contours for parotid or submandibular glands (10 CT scans, two of each structure per scan) Parotid gland ‘2’ and submandibular gland ‘1’ SPICE contours were taken forward for subsequent investigation.