Abstract
AbstractMethods for measuring and evaluating changes in volume of small tissue blocks prepared for transmission electron microscopy are presented. The results indicate: (1) that some blocks swell and others shrink, and (2) that changes in block volume can be explained by inhomogeneous changes occurring in three different tissue compartments.For stereological studies attempting to extrapolate changes in fixed and embedded tissue to those of fresh tissue, consequences of inhomogeneous volume changes in tissue compartments include a decrease in reliability and an increase in statistical variance of stereological density estimates. Since factors could not be found to correct for the changes in individual tissue compartments, alternative strategies are considered for dealing with the volume artifacts of fixation.
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