Evaluation of Image Quality Parameter MTF in Non-Destructive Testing of Oil and Gas Pipeline Using CT scans

Industrial computed tomography (CT), also known as industrial CT scanning, is now utilized as a portable method for evaluating corrosion, blockages, and other defects in oil and gas pipelines. The output images of this technique provide cross-sectional views of the interior of pipelines. As with any other non-destructive imaging method, assessing image quality is essential. In reconstructed CT images, the Modulation Transfer Function (MTF) serves as a measure of spatial resolution and image clarity. In this study, dual-energy linear detectors were employed to acquire projections of a standard aluminum cylinder with a diameter of ۲.۵ cm. Subsequently, image reconstruction was performed using the filtered back projection method, yielding cross-sectional images of the cylinder. By analyzing the edge spread function (ESF) and performing mathematical operations on the measured values, the imaging system's MTF at ۲۰% contrast was determined to be ۱.۲. This research highlights the importance of MTF as a quantitative metric for evaluating the performance of industrial tomography systems and contributes to the optimization of imaging techniques for critical pipeline inspections.

کلیدواژه ها:

Non-destructive testing ، Industrial computed tomography ، Image quality assessment ، Modulation transfer function (MTF).