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Cervical elastography image obtained from a short cervix using E-cervixTM. Acquisition of cervical elastography was performed in the mid-sagittal plane when measuring cervical length. Elastographic parameters and cervical length (CL) are displayed on the bottom left of the image. ECI, elasticity contrast index; EOS, mean of external os strain; HR, hardness ratio; IOS, mean of internal os strain.
