Chapter 7 X-ray tube - Bushong
The most widely used support structure for the x-ray tube is the - answer ceiling support
system
The external structure of the x-ray tube includes the support structure, the protective
housing and the – answer Glass envelope
As an x-ray tube ages, the inside can become coated with tungsten, which can cause
_____ in the tube. - answer arcing
The negative side of the x-ray tube hold the ______ - answer filament
What is the most common cause of the tube failure ? – answer Tungsten vaporization
The filament is made of – answer Tungsten
(smaller better resolution
bigger better heat capacity )
Thermionic emission at the filament creates a _____. – answer Space charge
The rotating anode is turned by a - answermagnetic field
When electrons bombard the target, _____ % of their kinetic energy is converted to heat
- answer99
(electron 10 % hit the IR 90% is attenuated )
The target of the rotating anode is usually coated with a _______ alloy -
answertungsten
The ______ is the source of radiation in the x-ray tube - answerfocal spot
Because of the line focus principal, the effective focal spot size decreases with
decreasing _____. - answertarget angle
High capacity tube rotors revolve at _____ rpm. - answer10,000 rpm
The x-ray intensity is lower on the anode side of the tube because of the _________ . -
answerheel effect
( 40 percent different on heel effect
75% ---------120% )
The most widely used support structure for the x-ray tube is the - answer ceiling support
system
The external structure of the x-ray tube includes the support structure, the protective
housing and the – answer Glass envelope
As an x-ray tube ages, the inside can become coated with tungsten, which can cause
_____ in the tube. - answer arcing
The negative side of the x-ray tube hold the ______ - answer filament
What is the most common cause of the tube failure ? – answer Tungsten vaporization
The filament is made of – answer Tungsten
(smaller better resolution
bigger better heat capacity )
Thermionic emission at the filament creates a _____. – answer Space charge
The rotating anode is turned by a - answermagnetic field
When electrons bombard the target, _____ % of their kinetic energy is converted to heat
- answer99
(electron 10 % hit the IR 90% is attenuated )
The target of the rotating anode is usually coated with a _______ alloy -
answertungsten
The ______ is the source of radiation in the x-ray tube - answerfocal spot
Because of the line focus principal, the effective focal spot size decreases with
decreasing _____. - answertarget angle
High capacity tube rotors revolve at _____ rpm. - answer10,000 rpm
The x-ray intensity is lower on the anode side of the tube because of the _________ . -
answerheel effect
( 40 percent different on heel effect
75% ---------120% )
