a recovering step between step S5 and step S6, and the recovering step comprising: setting the voxel of which ADC value is no greater than the ADC threshold of {TAIL ~ the transition area} as the foreground voxel, and finding the adjacent voxels of {HEAD ~ each foreground voxel} of the first image 
a recovering step between step S5 and step S6 , and the recovering step comprising : setting the voxel of which ADC value is no greater than the ADC threshold of { TAIL ~ the transition area } as the foreground voxel , and finding the adjacent voxels of { HEAD ~ each foreground voxel } of the first image
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH