Briefly, which are the strain and acoustic radiation force impulse elastographic characteristics for the differential diagnosis of a benign from a malignant lesion?
Strain elastography: Benign lesions: elasticity score: 1-3 and strain ratio<2.45. Malignant lesions: elasticity score: 4,5 and strain ratio>2.45. Acoustic radiation force impulse elastography: Benign lesions: a)black and white virtual touch tissue image: 'softer/whiter', 'equal stiffness/same darkness' color map virtual touch tissue image: purple, green. Malignant lesions: 'darker', 'cellular sample'. b)Virtual touch tissue quantification/ shearwave velocity inside the lesion <3.065 m/sec. Maignant lesions >3.065 m/sec.
There is a hypoechoic, oval, well defined, wider than the taller lesion. The colour Doppler revealed a mild, peripheric flow. Elasticity score of 1. One the black and white Virtual Touch Tissue Image there is equal stiffness between the mass and the surrounding breast tissue.
Colour map Virtual Touch Tissue Imaging: green colour (benign).
Shear wave velocity inside the lesion is equal to 2.5 m/sec (<3.065 m/sec).