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Global radiation therapy research is growing but lags behind other cancer treatments. Key areas like preparation and delivery dominate, while health services and palliative care are underrepresented, indicating a need for policy changes and international collaboration.

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Area of Science:

  • Oncology
  • Public Health
  • Bibliometrics

Background:

  • Radiation therapy is a fundamental cancer treatment facing underutilization and research prioritization challenges.
  • Despite rapid technical advancements, its research domain requires strategic evaluation from a public policy standpoint.
  • Understanding the global research landscape is crucial for identifying strengths, weaknesses, and opportunities in radiation therapy.

Purpose of the Study:

  • To quantitatively analyze the evolution of global radiation therapy research from 2001 to 2015.
  • To identify research trends, country-specific contributions, and impact across different domains.
  • To inform future research programs and public policy for radiation therapy.

Main Methods:

  • Bibliometric analysis of 62,550 radiation therapy research articles.
  • Data sourced from the Web of Science database, covering 127 countries and 2531 journals.
  • Focus on research output, citation impact, and regional patterns among leading countries.

Main Results:

  • The United States led global research output (32.3%), followed by Japan and Germany.
  • Preparation, delivery, combined modalities, and fractionation constituted nearly half of all publications.
  • Health services, palliative care, and quality of life research were significantly underrepresented (2-5%).
  • Trial-related publications were limited (5.1%), and research impact varied significantly by country.
  • Publication output is increasing but lags behind other cancer management fields.

Conclusions:

  • Radiation therapy research shows regional patterns and a disconnect between output volume and citation impact.
  • There is a need for increased support and international collaboration, particularly for low- and middle-income countries.
  • Findings provide a knowledge base to guide future radiation therapy research and policy development.