Drawings of phantom mold (a) cavity, (b) core, and (c) complete assembly showing 1 mm gap between cavity and core.
Depth locations of inclusions (a) 5 mm, (b) 10 mm, and (c) 20 mm, and (d) 6-o’ clock position when the breast is viewed from front.
Molding procedure of silicone breast phantoms: (a) process of core extraction, (b) procedure of placing a stiff tumor into the healthy tissue, (c) cured healthy tissue, (d) circular disc with bolts, (e) method of applying a circular disk during molding of pectoral muscle, (f) the molded breast phantom.
(a) Mean values, μ, and (b) Coefficient of variation (Cv = σ/μ) of storage modulus, E′.
(a) Mean values, μ, and (b) coefficient of variation (Cv = σ/μ) of damping ratios, ζ.
Bode plot of healthy (solid) and tumors dataset (dotted) showing shift in the natural frequencies both in terms of magnitude of surface vibration (a) and phase (b).
Result of t-test for phantoms (a) healthy and (b) having a 20 mm tumor at 6-o’ clock. The thresholded outcome 1 − p hypothesis rejected (lighter area with value 1) or accepted (dark area with value 0) is shown in each case, indicating an abrupt change in the natural frequencies and thus a stiffer inclusion at the red area.
MRE reconstruction of a phantom with “composition-B” as background and two inclusions: “composition-C” on the left and “composition-A” on the right. A subset of slices from the full volume data read shown: (a) is a T2* weighted image, (b) is the storage modulus (kPa), (c) is the loss modulus (kPa), and (d) is the damping ratio.
Materials used for mimicking breast tissues and the measured values of Young's modulus by previous investigators.
Description of tumor location (depth) in heterogeneous breast phantoms.
Materials used for mimicking different tissues in DIET anthropomorphic breast phantoms.
Materials used for mimicking background and inclusions in the MRE phantom.
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