Podcast
Questions and Answers
What causes the emission of X-ray photons in Bremsstrahlung radiation?
What causes the emission of X-ray photons in Bremsstrahlung radiation?
- An electron colliding with another electron
- An electron being decelerated by the nucleus' electric field (correct)
- An electron being accelerated towards the nucleus
- An electron ejecting another electron from an inner shell
What does the amount of Bremsstrahlung radiation depend on?
What does the amount of Bremsstrahlung radiation depend on?
- The speed of light
- The distance between electrons and the nucleus
- The electric field of the target
- The number of protons and the kV peak (correct)
What happens during the characteristic X-ray emission?
What happens during the characteristic X-ray emission?
- An electron fills a vacancy created by an ejected electron (correct)
- An electron's direction is changed by a magnetic field
- An electron slows down as it approaches a nucleus
- An electron is absorbed by the nucleus
What parameter represents the initial beam intensity in the X-ray attenuation equation?
What parameter represents the initial beam intensity in the X-ray attenuation equation?
What does the linear attenuation coefficient measure?
What does the linear attenuation coefficient measure?
In the equation $I=I_0e^{-rac{
ho L}{m}}$, what does $x$ represent?
In the equation $I=I_0e^{-rac{ ho L}{m}}$, what does $x$ represent?
Which type of radiation is emitted when an electron is decelerated by the positive electric field of a nucleus?
Which type of radiation is emitted when an electron is decelerated by the positive electric field of a nucleus?
What happens to the ejected electron in characteristic X-ray emission?
What happens to the ejected electron in characteristic X-ray emission?
What is the numerical value for $e$ in the exponential term of the X-ray attenuation formula?
What is the numerical value for $e$ in the exponential term of the X-ray attenuation formula?
Which process involves an outer shell electron filling a vacancy in an inner electron shell?
Which process involves an outer shell electron filling a vacancy in an inner electron shell?
Study Notes
Types of X-rays
- Bremsstrahlung Spectrum (Continuous X-ray) is produced when accelerated electrons are decelerated by the positive electric field of an atomic nucleus, emitting X-ray photons of equal energy.
Bremsstrahlung Radiation
- Occurs when electrons change direction, losing kinetic energy, which is emitted as an X-ray photon.
- The amount of bremsstrahlung depends on the number of protons in the target and the kV peak.
Characteristic X-ray
- Produced when an electron interacts with an atomic electron within the anode, ejecting it from its shell.
- The ejected electron vacancy is filled by an outer shell electron, emitting an X-ray photon with energy equal to the binding energy difference between the two shells.
X-ray Absorption by Tissue
- X-ray attenuation is the reduction of the X-ray beam due to absorption and scattering.
- Attenuation of an X-ray beam can be measured using the equation: I=I₀e^(–μx).
Attenuation Equation Variables
- Iâ‚€ = initial beam intensity
- I = unattenuated (transmitted) beam intensity
- μ = linear attenuation coefficient
- e = 2.718
- x = thickness of the attenuator (e.g., brain tumor, bone, aluminum)
Linear Attenuation Coefficient (μ)
- Measures the probability that a photon interacts (is absorbed or scattered) per unit length it travels in a specified material.
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Description
Learn about the different types of X-ray spectra, including Bremsstrahlung or Continuous X-ray, and its properties.
