Chapter 2: Safety and RegulatoryOptima XR220amx X-Ray System 54400222-1EN Rev 1 DRAFT 11092010 2-28Operator Manual © 2010 General Electric Company. All rights reserved.CAUTION Use the largest possible focal spot-to-skin distance to keep the patient absorbeddose as small as possible.CAUTION If no technical factors are present in the system for any view, the default settingsare:– kV = 50– ma = 100 (fixed setting)– mAs = .05These values are placeholders only. No exposures should be made until the userselects values appropriate for the patient size.CAUTION This system source assembly is designed to be used with only the OptimaXR220amx tube and collimator. Replacement of either of these components withdifferent types may render the system non-compliant to applicable radiationsafety standards and regulations.4.00 4003.20 5002.50 6402.00 8001.60 1000Table 2-18 Dose ChartExpected receptor Default Dose (μGy) at 80 kVpis less than: Equivalent Film SpeedDRAFT REVIEW COPYCTRL+SHIFT+F to search using Search Index (faster)