Physics- X-ray production
Four Principal Factors Influencing the Shape of an X-Ray Emission Spectrum
1. Kinetic Energy of the Projectile Electrons 2. Thickness of the target 3. Low-energy x-rays absorbed by the target 4. External filtration - absorbs low-energy
Effect of mA and mAs on the Shape of an X-Ray Emission Spectrum
A change in mA or mAs results in a proportional change in the amplitude of the x-ray emission spectrum at all energies.
Effect of kVp on the Shape of an X-Ray Emission Spectrum
A change in voltage peak affects both the amplitude and the position of the x-ray emission spectrum.
Factor:Tube Voltage Effect?
Effect: Amplitude and position
Factor:Tube Current Effect?
Effect: Amplitude of Spectrum
Factor: Target Material Effect?
Effect: Amplitude of spectrum, position of line spectrum
Factor: Voltage Waveform Effect?
Effect: Amplitude, most effective at high energy
Factor: Added Filtration Effect?
Effect: Amplitude, most effective at low energy
Effect of Added Filtration
The overall result of added filtration is an increase in the average energy of the x-ray beam with an accompanying reduction in x-ray quantity.