Abstract
Recommended power requirements for the modern radiology department become a major deterrent to department expansion if manufacturers' recommendations are met in additive fashion. This is particularly true on a cost-feasibility basis when the distribution line from the power transformer must be long. The additional requirement may be as much as 112.5 kVA for a 1,000 milliampere generator (3). The National Electrical Code (2) indicates that the line feeder rating shall be the sum of the name plate ratings unless simultaneous operation is not possible. The purpose of this study was to determine and evaluate such needs. Three logical steps became apparent with early consideration of the problem. First, calculated statistics had to be tested in actual work condition, as a bayesian bias led us to believe that simultaneous exposures would occur more frequently than had been calculated. Second, it was necessary to determine the effect of simultaneous exposures on radiographic quality. Third, a system of preventin...
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