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.
CT scan and MRI introduced. 1972 - 1985. The use of x-rays in medicine was a huge breakthrough at the turn of the century. The problem with x-rays, though, is that they're two-dimensional. Organs of the same density look the same. But British engineer Godfrey Hounsfield came up with an improvement on the 70-year-old technology. It combined x-ray images with a computer. If you took many x-rays of the same area, at slightly different angles, a computer could put the information from the x-rays together to create a cross-sectional image.