Table 5.

Parameters of the Gaussian Mixture Model for the exam with the benign tumour and the exam with the malignant tumour (rounded to the nearest unit).

	Exam with the Benign Tumour		Exam with the Malignant Tumour
	Voxel Intensity Equations	Voxel Intensity	Voxel Intensity Equations	Voxel Intensity
Minimum	0	0	0	0
Fibroglandular_low	${\mu }_{fg}-{\sigma }_{fg}$	55	$2\times {\mu }_{fg}-M_{fg}$	104
Fibroglandular_median	${\mu }_{fg}$	80	${\mu }_{fg}$	115
Fibroglandular_high	${\mu }_{fg}+{\sigma }_{fg}$	104	$M_{fg}={\mu }_{fat}-{\sigma }_{fat}-\delta$	127
Fat_low	${\mu }_{fat}-{\sigma }_{fat}$	113	${\mu }_{fat}-{\delta }_{fat}$	134
Fat_median	${\mu }_{fat}$	129	${\mu }_{fat}$	143
Fat_high	${\mu }_{fat}+{\sigma }_{fat}$	144	${\mu }_{fat}+{\delta }_{fat}$	152
Maximum	Maximum intensity of the image	221	Maximum intensity of the image	255