A good radiograph is taken with 100 mA, 240 ms, 150 RS, 200 cm SID and a 5:1 grid. If mA is kept constant what time will be used if a technique of: 75 RS, 100 cm SID and a 10:1 grid is substituted?
A radiograph has an intensity of 360 mR at a distance of 80 inches what will the intensity be at 120 inches?
A good exposure is taken using 60 mAs and then the radiographer increases the SID by a factor of two while decreasing the GCF by a factor of 2 what change should occur for the mAs value to maintain good exposure conditions i.e. maintain intensity.
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