What is the primary advantage of using an IQI in radiography?

The primary advantage of using an Image Quality Indicator (IQI) in radiography is that it provides a measurement of image quality. IQIs are specifically designed to assess the characteristics of a radiographic image and ensure that the image produced meets the required standards for clarity and detail. By using an IQI, inspectors can evaluate whether the radiographic technique was adequate to detect any flaws or irregularities in the weldments being examined.

IQIs consist of specific patterns or materials that are radiologically detectable and are placed alongside the subject being inspected. The resulting image is then analyzed to determine if the necessary contrast and resolution are achieved, indicating that the inspection can be confidently utilized for evaluating the integrity of welds and structures. Thus, the use of an IQI helps ensure that the radiographic inspection is reliable and effective, serving as a crucial component in quality assurance processes for pipelines and related facilities.