Change:  performance medical X-ray tubes. Contemporary CT tubes have power ratings of up to 100 kW and anode heat capacity of 6 MJ, yet retain an effective focal spot area of less than 1 mm2. Simplified rotating anode tube schematic A: AnodeC: cathodeT: Anode targetW: X-ray window   View changes from previous version. (Word count: 931)

Change: 10-4 Pa, or 10-6 Torr). In the Coolidge tube, the electrons are produced by thermionic effect from a tungsten filament heated by an electric current. The filament   View changes from previous version. (Word count: 601)

Change: Crookes X-ray tube from early 1900s. The cathode is on the right, the anode is in the center with attached heat sink at left. The device at top is used to regulate the gas pressure. Historically, the first X-ray tube was invented   View changes from previous version. (Word count: 627)

Change: Created by Anonymous Jul 23 2008, 12:35 AM EDT for: no reason given