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Efficacy of an intracassette filter for improved pneumocolon decubitus radiographs.

Decubitus radiographs are important in air-contrast barium enemas [i -5]. Uneven exposure of the film, however, often interferes with the diagnostic quality of the image. Because of uneven beam attenuation, the upper portion of the film is often overexposed when compared with the lower portion. In this study we evaluated the efficacy of an intracassette filter for improving the quality of decubitus radiographs obtained during the pneumocolon examination.