Here are some ways to extend the service life of CT tubes:

(1) Shorten the filament preheating time: The filament preheating time often exceeds the exposure time. Long-term power supply will shorten the lifespan of the filament, and the tungsten evaporated from the filament will adhere to the core glass and cause unstable operation of the CT tube.

(2) Operate with low tube current: High tube current will also shorten the filament's lifespan. Therefore, under the condition that the milliampere-second (the product of tube current and exposure time) is equal, low tube current and long exposure should be used as much as possible, and high tube current and short exposure should be used sparingly. Operating conditions that lower the exposure level limit are conducive to extending the lifespan of the focus trajectory and will also reduce the drop in radiation output caused by rough and uneven focus trajectories.

(3) Avoid high milliampere exposure on the cold target surface: As it may cause irregular contraction, it may lead to cracking of the target surface or explosion of the glass shell, thereby reducing the service life of the tube.

(4) Regularly maintain the CT tube. Tube maintenance can effectively improve the working environment of the tube core, thereby extending the service life of the tubes.