Radiographic total lung capacity determination aided by a programmable calculator.

Abstract
This report describes a method that was used to determine total lung capacity from routine chest radiographs, using a programmable calculator to facilitate computation. The results correlated closely with those obtained by a computerized method. The technique was rapid, inexpensive (the necessary equipment cost less than $400), and could be used in any pulmonary laboratory or office. The program is listed, and an example provided.

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