Abstract
BASIC QUALITY CONTROL IN A RADIOLOGICAL FACILITYE. Dale TroutRadiological PhysicsX -Ray Science and Engineering LaboratoryOregon State UniversityCorvallis, Oregon 97331This paper was presented at the meeting,but is not being published in these Proceedings.Herewith are the questions and answers which followed the oral presentation:Question from C. S. McCamy, Macbeth:(General Comment) You have stated that the performance specifications of modern densi-tometers exceed the needs of radiology for routine densitometric checks. If the accepta-ble range of density variation in the finished radiograph is of the order of 0.2 as hasbeen stated by some speakers, and if you accept the usual rule that the precision of ameasuring instrument should be ten times as good as that of the process being measured,then the instrument should have a precision of 0.02, which is axactly what is specified bydensitometer manufacturers.Question from T. Sandor, Harvard Medical School:The light intensity fluctuates in a viewbox considerably. This would affect your den-sity measurements. Also, what is your opinion or experience with the plastic Kodak cas-settes?Answer by E. Dale Trout:
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