Table 6.

Subjective evaluation results as means and standard deviations of the scores for each category, specifying the number of cases considered.

Category	№	Fast Marching Method			Active Contour Models
		Area pres.	Shape pres.	Overall d. q.	Area pres.	Shape pres.	Overall d. q.
Solid-round	23	3.84 $\pm$ 0.72	3.70 $\pm$ 0.68	3.62 $\pm$ 0.92	4.08 $\pm$ 0.63	3.82 $\pm$ 0.55	3.82 $\pm$ 0.64
Solid-irregular	27	3.86 $\pm$ 0.51	3.73 $\pm$ 0.57	3.65 $\pm$ 0.70	4.26 $\pm$ 0.49	4.19 $\pm$ 0.50	4.14 $\pm$ 0.53
Sub-solid	22	3.07 $\pm$ 0.72	3.09 $\pm$ 0.68	2.79 $\pm$ 0.58	3.42 $\pm$ 0.66	3.34 $\pm$ 0.73	3.08 $\pm$ 0.68
Cavitary	10	2.92 $\pm$ 1.06	2.80 $\pm$ 0.98	2.7 $\pm$ 0.96	3.57 $\pm$ 0.56	3.21 $\pm$ 0.36	3.15 $\pm$ 0.35