Fig. 8From: Effects of breast structure on high-intensity focused ultrasound focal errorDependency of the obtained breast structure on the brightness threshold value selected for the segmentation of the fibroglandular tissue (red) and fat (yellow), presented using breast phantom of Fig. 1(b). Brightness threshold values of (a) 301, (b) 437, and (c) 528 correspond to the fat percentage of 46.5, 66.5, and 86.5%, respectively. (d) Original MR imageBack to article page