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Using technique factors to predict patient ESE.

This paper describes a formula for estimating patient skin entrance exposures from representative techniques used in radiographic facilities. A flexible nomogram has been formatted to the parameters of patient dimensions and focal film distance. The corresponding exposure rate (mGy/mAs) is expressed for any assumed projection and selected kilovoltages. This measured approach is a valuable tool for exposure assessment and is in compliance with emerging government standards and the pursuit of the ALARA (as low as reasonably achievable) concept.