5C-4 Volumetric Strain Imaging

This study compares 3D strain volumes formed from RF echo data that was acquired using the same phantom with a commercially available C7F2 mechanically rocked array (MRA) operating at 6.15 MHz and a prototype 2-D capacitive micromachined ultrasound transducer (CMUT) operating at 9 MHz. Multiple motion tracking techniques were used in both cases to compare resulting strain images. The different tracking methods produced images with varying degrees of quality. Normalized cross correlation between the motion-compensated deformed RF data and the reference RF data was used as a measure of the accuracy of the motion tracking. The contrast to noise ratio of the inclusion and background were used as a measure of strain image quality.