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Table 1 Radial glandular fraction (RGF) features evaluated for the classification of the distribution of fibroglandular tissue

From: Classification of fibroglandular tissue distribution in the breast based on radiotherapy planning CT

Texture featurea

Feature number

Mean RGF

1

Standard deviation of RGF

2

Slope of linear regression of RGF vs. r

3

Radial position of maximum RGF

4

Minimum RGF

5

Maximum RGF

6

Difference in maximum and minimum

7

Mean of radially inner 50 % RGF

8

Mean of radially outer 50 % RGF

9

Difference in means of radially inner and outer 50 % RGF

10

Mean of highest 10 % RGF

11

Mean of lowest 10 % RGF

12

Difference in means of maximum and minimum 10 % RGF

13

  1. aFeatures were calculated using RGF values (100) and the corresponding relative radial distances (r)