Nondestructive testing or non-destructive testing (NDT) is a wide group of analysis techniques used in science and technology
industry to evaluate the properties of a material, component or system without causing damage.The terms nondestructive
examination (NDE), nondestructive inspection (NDI), and nondestructive evaluation (NDE) are also commonly used to describe
this technology. Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that
can save both money and time in product evaluation, troubleshooting, and research. Common NDT methods include ultrasonic,
magnetic-particle, liquid penetrant, radiographic, remote visual inspection (RVI), eddy-current testing, and low coherence
NDT is commonly used in forensic engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering, aeronautical engineering, medicine, and art. Innovations in the field of nondestructive testing have had a profound impact on medical imaging, including on echocardiography, medical ultrasonography, and digital radiography.