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Published online by Cambridge University Press: 14 March 2018
Valuable information concerning the relative amounts of the end proucts of histochemical and immunochemical reactions present in sections may be provided by qualitative evaluations, however, greater reliance is often placed on quantitative evaluations. Many quantitative evaluations are based on the use of image analysis and optical density readings of the visible end products. An important question is whether these quantitative measurements are reliable, accurate and reproducible, and if quantitation of these reactions offers any real advantage over qualitative evaluations.