Re: BE ALERT to short sharp stabbing pains in head!! Lucky, The reason they are suggesting an mri is for 2 reasons. The first being mris are alot more detailed than cat scans and can show things that cat scans cannot. Second they do it to cover their butts.
Quick Answer. Physicist Ernst Ruska and German engineer Max Knoll are credited with creating the first electron microscope in 1932. It permitted researchers greater magnification and resolution than traditional light microscopes.
1929 - the kinescope cathode ray tube was invented by Vladimir Kosma Zworykin. It formed some of the first television systems. 1931 - Allen B. Du Mont invented the first reproducible CRT used on television sets. Cathode Rays improved monumentally with the Discovery of the Electron.