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Related Concept Videos

Biological Effects of Radiation02:59

Biological Effects of Radiation

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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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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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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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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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Updated: Feb 11, 2026

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 Dose in Breast Imaging.

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    Annual screening mammography and advanced breast imaging expose radiosensitive breast tissue to low-dose radiation over time. This review covers radiation effects, dose estimates for breast imaging, and strategies for dose optimization.

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    Area of Science:

    • Radiology
    • Medical Physics
    • Oncology

    Background:

    • Annual screening mammography involves repeated low-dose radiation exposure over decades.
    • Advanced breast imaging and follow-up procedures increase radiation dose to radiosensitive breast tissue.

    Purpose of the Study:

    • To review the biological effects of radiation on breast tissue.
    • To summarize radiation dose measurements and estimates for various breast imaging modalities.
    • To discuss current efforts in optimizing radiation dose during breast imaging.

    Main Methods:

    • Literature review of studies on radiation effects in breast tissue.
    • Compilation and analysis of dose data from different breast imaging techniques.
    • Review of strategies for radiation dose reduction in mammography and other breast imaging.

    Main Results:

    • Breast tissue is particularly sensitive to radiation, with cumulative effects from repeated exposures.
    • Dose estimates vary across different imaging modalities, including mammography, tomosynthesis, and MRI.
    • Ongoing research focuses on advanced imaging techniques and protocols to minimize patient dose.

    Conclusions:

    • Understanding radiation effects and accurately estimating doses are crucial for breast imaging safety.
    • Optimizing radiation dose is essential to balance the benefits of early cancer detection with potential risks.
    • Continued research and technological advancements are key to improving radiation safety in breast imaging.