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.