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Related Concept Videos

Dose Size and Dosing Frequency: Determination Methods01:21

Dose Size and Dosing Frequency: Determination Methods

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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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Determination of Multiple Dosing Parameters: Loading and Maintenance Doses01:25

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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
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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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Salvage brachytherapy for locally recurrent prostate cancer after definitive radiotherapy - a multicentric French cohort by the SFRO brachytherapy group.

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Related Experiment Video

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Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
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Dose rate in brachytherapy using after-loading machine: pulsed or high-dose rate?

J-M Hannoun-Lévi1, D Peiffert2

  • 1Département de radiothérapie oncologie, centre Antoine-Lacassagne, université Nice-Sophia, 33, avenue de Valombrose, 06000 Nice, France.

Cancer Radiotherapie : Journal De La Societe Francaise De Radiotherapie Oncologique
|September 8, 2014
PubMed
Summary

The French Brachytherapy Group recommends after-loading machines over iridium wires for radiation oncology. This analysis compares pulsed-dose rate and high-dose rate brachytherapy, considering biological, technological, organizational, and financial factors.

Keywords:
After-loading machineBrachytherapyCuriethérapieDébit de dose pulséHaut débit de doseHigh-dose rateProjecteur de sourcePulsed-dose rate

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Area of Science:

  • Oncology
  • Medical Physics
  • Radiation Therapy

Background:

  • Industrial production of 192 iridium sources (IRF1 and IRF2) ceased in February 2014.
  • This cessation necessitates a transition away from low-dose rate iridium wire brachytherapy.

Purpose of the Study:

  • To provide a comparative analysis of pulsed-dose rate (PDR) and high-dose rate (HDR) brachytherapy.
  • To evaluate PDR and HDR brachytherapy based on biological, technological, organizational, and financial considerations.

Main Methods:

  • Comparative analysis of PDR and HDR brachytherapy techniques.
  • Evaluation across multiple domains: biological effects, technological requirements, organizational logistics, and financial implications.

Main Results:

  • The study facilitates an informed decision-making process for adopting new brachytherapy technologies.
  • Identifies key differences and considerations for implementing PDR versus HDR after-loading systems.

Conclusions:

  • The shift from iridium wires to after-loading machines is a critical change in brachytherapy practice.
  • A comprehensive evaluation of PDR and HDR brachytherapy is essential for optimizing patient care and resource allocation in radiation oncology.