LRA 222 FINAL REVIEW

The three main parts of the x-ray imaging system are the x-ray tube, _____, and _____. - Answer-operating console, high voltage generator Each tube has its own tube rating chart to show... - Answer-maximum exposure times Because of the line focus principle, the effective focal spot size decreases with increasing... - Answer-target angle The negative side of the x-ray tube holds the... - Answer-filament The difference in the waveform between the primary and secondary sides of the high voltage transformer is _____. - Answer-amplitude The high voltage generator contains the high voltage transformer, the _____, and the _____. - Answer-timer, rectifiers The filament is made of... - Answer-tungsten Extrafocal or off-focus radiation is produced from... - Answer-rebounding electrons The rotating anode is turned by the... - Answer-magnetic field The principal disadvantage of three-phase equipment is _____. - Answer-cost The x-ray intensity is lower on the anode side of the two because of the... - Answer-heel effect When electrons bombard the target, _____ of their kinetic energy is converted to heat - Answer-99% The _____ spot is the source of radiation in the x-ray tube. - Answer-focal What is the most common cause of tube failure? - Answer-tungsten vaporization High capacity tube rotors revolved... - Answer-10,000 rpm The cathode side of the tube should be directed toward the _____ part of the patient. - Answer-thicker Thermionic emission at the filament creates a... - Answer-space cloud