A Rapid Method for Producing Subtraction Technic Roentgenograms

Abstract
A method is described for making subtraction technique films with materials found in most radiology departments. All films are developed by a rapid film processor. The quality of the subtraction films is improved by programming the film-changer to expose films at the beginning of each run immediately before the injection of contrast material; these roentgenograms make better masks than do routine scout roentgenograms.

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