The Value of Plain Radiographs Prior to Oral Cholecystography

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Abstract
The diagnostic significance of a routine preliminary plain radiograph of the right upper abdominal quadrant prior to oral cholecystography was evaluated retrospectively. The plain radiograph was decisive in the diagnosis in only 1 case out of 1022 consecutive cholecystrographic examinations (0.1%) (95% confidence limits: 0.00-0.55%). The sensitivity of oral cholecystography, now approximately 90%, would drop by only 0.43% (95% confidence limits: 0.01-2.14%) if the routine plain radiograph were omitted.

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