Alternatively strain can be measured directly from the change in distance between speckles .
From this , a velocity field again can be generated over the whole sector , as with tissue Doppler , and strain rate can be derived , and then strain can be integrated .
Strain can be measured directly from the change in distance between speckles .
From this , a velocity field again can be generated over the whole sector , as with tissue Doppler , and strain rate can be derived , and then strain can be integrated .