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Related Concept Videos

Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

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The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
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Radiation physics.

Britt H Tonnessen1, Lori Pounds

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This summary is machine-generated.

Understanding radiation doses is crucial for patient safety during imaging procedures. Physicians must manage radiation exposure risks for themselves and patients.

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Area of Science:

  • Medical Imaging Physics
  • Radiation Biology

Background:

  • Radiation is energy in motion, with varying forms.
  • Radiation doses and imaging areas are critical factors in patient procedures, especially percutaneous interventions.

Purpose of the Study:

  • To review fundamental concepts of radiation imaging and dosimetry.
  • To provide guidance on managing radiation exposure in medical settings.

Main Methods:

  • Literature review of essential physics, radiation imaging principles, and dosimetry.
  • Graphical tabulation of radiation dose, exposure, and total body delivery.

Main Results:

  • Dose, radiation exposure, and total body radiation delivery were analyzed.
  • Data on radiation parameters were presented in graphical tables.

Conclusions:

  • Institutions monitor individual radiation doses.
  • Physicians are responsible for minimizing excessive radiation exposure by understanding dosages and biological risks to protect patients and themselves.