Densitometer 391

The 391 Densitometer includes all of the capabilities of the 390 and automatically establishes aim values and control limits, calculates crossover values, and plots monthly control charts - freeing the operator to focus on patient care. 31 daily readings for up to 12 processors can be stored in the internal memory. Networking capabilities of the 391 enable facilities with multiple processor sites to communicate processor quality control information across phone lines. The 391 reads and stores densities in less time than it takes to measure manually. Immediately after completing a measurement, the 391 displays the 21 density readings in addition to QC parameters, such as base plus fog, speed, contrast index, average gradient, D-Max and gamma.