Digital radiography of the chest: clinical experience with a prototype unit.

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Abstract
A prototype digital unit dedicated to chest radiography was used to examine 50 selected patients for a comparison study of the capability of digital images and conventional chest radiographs to reveal normal anatomic structures and a variety of pathologic states. The images in both modes were submitted for interpretation to 7 experienced radiologists and a standardized questionnaire completed for each. Visibility of 7 anatomic structures in the mediastinum was consistently better on the digital images than on the conventional radiographs. With minor exceptions, pathologic states were equally well seen in the 2 systems. Despite the less familiar viewing format of the digital images, the mean confidence levels achieved were higher than for those on the conventional radiographs; this difference was statistically significant both for normal anatomic structures (P = 0.001) and pathologic states (P = 0.01). The advantages and disadvantages of the digital technique are discussed.

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