IQI - IMAGE QUALITY INDICATOR
What is Image Quality indicator(IQI) or Penetrameter? The time of radiographic testing, the use of Image Quality Indicator (IQI) or Penetrameter , provides the first indication of the quality of the radiograph. The IQI is used in RT to establish the RT film image quality. It is placed on the test object that has to be radiographed to evaluate the radiograph sensitivity. The Image Quality Indicator (IQI) consists of wires of different thickness (where wire material is the same as the test piece material), which are welded into a plastic film. The thinner the depicted wire on the radiograph, the higher the image quality level. Penetrameters It is used to determine the sensitivity of the radiograph by placing it on the test piece. Generally these are made of the same material that is being radiographed. Thus, if the penetrameter can be seen clearly on the radiograph any change in thickness of the test object (2% or more) will be seen clearly also. Radio...