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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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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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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
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Updated: Sep 19, 2025

Radiation Planning Assistant - A Streamlined, Fully Automated Radiotherapy Treatment Planning System
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Roadmap: medical physics technologies in brachytherapy.

William Y Song1, Michael Roumeliotis2, Junghoon Lee2

  • 1Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, United States of America.

Physics in Medicine and Biology
|June 6, 2025
PubMed
Summary
This summary is machine-generated.

Brachytherapy utilization is declining due to complexity and cost, impacting cancer patient outcomes. Advances in imaging, planning, and delivery offer solutions to revitalize this effective radiotherapy technique.

Keywords:
brachytherapy roadmapbrachytherapy technologymedical physics

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Area of Science:

  • Oncology
  • Medical Physics
  • Radiotherapy

Background:

  • Brachytherapy is a vital cancer radiotherapy technique delivering targeted radiation doses.
  • Utilization has decreased due to complexity, reimbursement issues, and dexterity demands.
  • Despite challenges, brachytherapy shows growth in Africa and benefits from technological advancements.

Purpose of the Study:

  • To provide a comprehensive overview of brachytherapy advancements.
  • To preview strategies addressing key challenges in brachytherapy.
  • To enhance the efficacy of cancer treatments through improved brachytherapy.

Main Methods:

  • Roadmap paper format.
  • Comprehensive review of current literature and technological trends.
  • Analysis of challenges and solutions in four critical areas: Imaging/Image Guidance, Treatment Planning, Treatment Delivery, and Brachytherapy Outcomes.

Main Results:

  • Identification of key challenges hindering brachytherapy adoption.
  • Preview of technological and strategic advancements in imaging, planning, delivery, and outcomes.
  • Highlighting growing applications in regions like Africa.

Conclusions:

  • Advances in medical physics and strategic planning can overcome brachytherapy barriers.
  • Enhanced therapeutic efficacy is expected through improved techniques and tools.
  • The paper aims to equip clinicians globally for state-of-the-art cancer care, ensuring a positive future for brachytherapy.