<prompt> Distance between x-ray source and film cassette should be:60 inches50 inches65 Inches55 inches  <response>: 3 distancesx ray source midsaggital : 5 Feet : 60 : 152.4 cmmid saggital film cassettes : 15 cm Acc to Jacobson 18 cm 7 Gurkeerat singx ray source film casetes : 176 170 cm around 66 