Figure 7
From: Small-window parametric imaging based on information entropy for ultrasound tissue characterization
(a–d) B-mode images of Type-A agar phantoms with number densities of scatterers of 2, 4, 8, and 16 scatterers/mm3 (SL = 1; frequency = 6 MHz; scanned at a focus of 1 cm). The dimensions for all images are the same. The grayscale and color bars represent the pixel values (the brightness) of the B-mode and entropy images, respectively. (e–h) Entropy images corresponding to (a–d). (i) Entropy as a function of the number density of scatterers. Data were expressed by mean ± standard deviation.
