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3.2 First Steps with VGStudio Fig. 15 The 3D image after noise/air and soft tissue have been removed. Only the bone structures, the teeth and metal parts are now visible. The reason for this is explained in the following picture. Fig. 16 From left to right, the grayvalues of the different structures are displayed, i.e. noise/air, fat, muscle, and bone structures. Noise and air will appear on the left-hand side of the Opacity manipulation area. The next tissues which appear towards brighter grayvalues are fat and muscles. The brightest tissue is the bone structure, teeth and metal braces which appear on the right-hand side of the Opacity manipulation area. If all the grayvalues of tissues such as air/noise, fat and muscle are set to zero opacity, only the bone structure, teeth, and metal will remain visible. VGStudio 1.1 User’s Manual 39
