Fig. 9From: Effects of breast structure on high-intensity focused ultrasound focal errorDependency of the focal shape on the brightness threshold value selected for the segmentation of the fibroglandular tissue and fat. Brightness threshold values of (a) 301, (b) 437, and (c) 528 correspond to the breast models of Fig. 8(a), (b) and (c), respectively ((a) Φ = 0.704, (b) Φ = 0.465, (c) Φ = 0.478)Back to article page