Table 1.

Initially classified labels by the adaptive threshold strategy on the data histogram, followed by VQ classification of the bone class.

	Before VQ	After VQ
Air	1	1
Fat	2	2
Muscle	3	3
Bone and TM	4	Subdivided class 1	5
		Subdivided class 2	6
		Subdivided class 3	7
		Subdivided class 4	8
		Subdivided class 5	9
		Subdivided class 6	10
		Subdivided class 7	11
		Subdivided class 8	12
		Subdivided class 9	13
		Subdivided class 10	14