The industry with the most welders is the architectural and structural metals manufacturing industry. It offers a mean wage of $34,960, much closer to the average for welders as a whole. Pay in the five industries with the greatest number of welders ranges from $32,900 to $37,600 per year.
Magnetic Resonance Imaging device [36â39]. However, the original idea of applying NMR to medical. imaging (MRI) was first proposed by Raymond V, Damadian, M.D. [40], who was granted a U.S. patent for an MRI scanner, and founded a company to manufacture such scanners.
Robert S. Ledley, who invented the whole-body CT scanner, with the first such device, at Georgetown University in 1974. Credit National Biomedical Research Foundation.efore the advent of CT scanning in the early 1970s, radiologists had limited tools. CT scanning gave them not only a far higher resolution than traditional X-rays but also three-dimensional, cross-sectional images to work with, significantly reducing the need for exploratory surgery and its attendant risks.