Strain histograms are equal to strain ratios in predicting malignancy in breast tumours
Fig 3
(A) Strain histogram analysis of an 11 mm BI-RADS 3 tumour. The strain elastogram shows a predominantly blue tumour. Strain histogram analysis was performed from a single ROI within the tumour (ROI A). The B-mode image shows an oval, circumscribed, hypoechoic tumour, which is wider than tall and with slight posterior enhancement. Histology showed carcinoma. (B) The strain histogram is displayed as a bar chart, with the pixel colour values on the x-axis, and the number of pixels of a certain colour pr. 1000 pixels within the ROI on the y-axis. The mean colour value of the tumour is then calculated. In this case the mean colour value was 190, signifying a relatively stiff tumour, consistent with carcinoma.