1a) A 65 year old woman who presented with nodularity of the right breast, eventually diagnosed as invasive ductal carcinoma. Transverse ultrasound image revealed an oval, hypoechoic mass with parallel orientation, indistinct margins and a thick echogenic halo interpreted as BI-RADS 4A.
1b) Side by side display of B mode and elastography images with colour mapping used for evaluation of elastography score. There is no strain seen within the lesion as well as in the surrounding area i.e. Elastography Score of 5
1c) To calculate the strain ratio, relative strain values of the mass (ROI 2) and fat (ROI 1) were measured taking care that both regions of interest (ROI) were of the same size. The strain ratio defined as the fat to mass strain ratio was automatically calculated. The strain index was 5.72.
1d) Calculation of distance ratio: The longest lesion dimension was manually measured on both the elastogram (D1) and the corresponding B mode image(D2). The corresponding distance ratio was calculated. The distance ratio was 1.4
1e) The area ratio was then calculated from the automated tracing of the area of the lesion on the elastogram (A1) and on B mode (A2). The area ratio was 2.25