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Real-Time Shear Strain Movies
 
BREAST ADENOCARCINOMA MOVIE: Cine-loop from an in vivo hand-held acquisition of breast adenocarcinoma showing no "fill-in" of axial-shear strain inside the tumor. Shown left to right: cine-loop of Sonogram, Axial Strain Elastogram, Axial-Shear Strain Elastogram (ASSE), and color-overlay of ASSE on the corresponding sonogram. Note that frame-filtering was done to automatically remove noisy frames from the loop. Original clinical scans were acquired by Dr Brian Garra from the University of Vermont using an Ultrasonix scanner. 83.0 MB
 
BREAST FIBROADENOMA MOVIE: Cine-loop from an in vivo hand-held acquisition of breast fibroadenoma showing "fill-in" of axial-shear strain inside the lesion over many frames. Shown left to right: cine-loop of Sonogram, Axial Strain Elastogram, Axial-Shear Strain Elastogram (ASSE), and color-overlay of ASSE on the corresponding sonogram. Note that frame-filtering was done to automatically remove noisy frames from the loop. Original clinical scans were acquired by Dr Brian Garra from the University of Vermont using an Ultrasonix scanner. 29.1 MB
 
EFFECT OF ASPECT RATIO ON AXIAL SHEAR STRAIN FILL-IN EFFECT IN ELLIPTICAL INCLUSIONS:
A Finite Element simulation showing the effect of the aspect ratio on the axial shear-strain fill-in effect in firmly-bonded (left) and loosely-bonded (right) elliptical inclusions oriented at 5 degrees from horizontal. The range of aspect ratio is between 1 and 2. Observe the fill-in of the loosely-bonded inclusion even at aspect ratios slightly >1, and the lack of this effect in the firmly-bonded inclusion at all aspect ratios.
 
EFFECT OF ANGLE ON AXIAL SHEAR STRAIN FILL-IN EFFECT IN ELLIPTICAL INCLUSIONS:
A Finite Element simulation showing the effect of the angle of orientation on the fill -in effect in firmly-bonded (left) and loosely-bonded (right) elliptical inclusions (aspect ratio 1.5) oriented at angles between 0 and 180 degrees from horizontal. Observe the blue fill-in of the loosely-bonded inclusion even at very small angles >0; diminutions of this effect near 90 degrees and; a reversal of the effect (red fill-in starting from the opposite direction) at angles larger that 90 degree, which disappears near 189 degrees. Observe the lack of fill-in in the firmly-bonded inclusion at all angles.
 
Axial Shear Bonded      47 MB
Axial Shear Unbonded  37 MB
 
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Last Modified October 13, 2009