Xray Production Flashcards
Electrons have
Same mass
Electron KE is increased by
Raising kVp
Increased electron KE will result to
Increased in both the intensity and energy of the X-ray beam
Distance bet the filament and X-ray tube target
Approx. 1cm
Accelerating force needs to raise the velocity of electrons from
Zero to half the speed of light in a short distance
Electrons travelling from cathode to anode
Projectile electrons
When projectile electrons travels
Hit the target
Transfer their kinetic energy to the target atoms
Most kinetic energy of projectile electrons is
Converted into heat
Interact with the outer-shell electrons but do not transfer sufficient energy
Projectile electrons
Responsible for most of the heat generated in the X-ray tube
Constant excitation
Return of outer-shell electrons
Approx. 99% of KE of projectile electrons is
Converted into heat
Tube current and anode heat is
Directly proportional
Efficiency of X-ray production increases
Increasing kVp
Emitted when an outer-shell electron fills an inner shell void
Characteristic radiation
Result when the interaction is sufficiently violent to ionize the target atom through removal of inner shell electron
Characteristic radiation
Ejection if an inner shell electron resulted to
Void in the k-shell
Only shell that is useful in imaging
K-characteristic X-rays of tungsten
LMNO shell
Less energy due to lower binding energy
Type of x-radiation is called characteristic because it is
Characteristics of the target element
Higher the atomic number of the target
Higher the energy of characteristic X-ray
Bremsstrahlung is also known as
General
White radiation
Polychromatic
Continuous
Electromagnetic radiation generated when
Negatively charged electrons in motion are deflected by positively charged atomic nuclei
Interaction bet projectile electron and the nuclear force field of a target atom
Bremsstrahlung radiation
Attraction bet projectile electron that may come close the nucleus
Electrostatic force of attraction
Loss of kinetic energy reappears as an X-ray
Bremsstrahlung X-rays
Bremsstrahlung is a German word that means
“Slowed down radiation” “braking radiation”
Bremsstrahlung refers to the
Deceleration of electrons as the cause of radiation
Low energy bremsstrahlung results when
The projectile electron is barely influenced by the nucleus
High energy X-rays occurs when
The projectile electrons loses all its kinetic energy and simply drifts away from the nucleus
Greater the change in direction
the more energy loss of energy,
Higher energy photon
At 100 kVp,
Approx 15% of the X-ray bean is characteristic
Remaining is bremsstrahlung
Energy of motion
Kinetic energy
