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Mohammad Javad Keikhai Farzaneh1,2, Mehdi Momennezhad1,3, Shahrokh Naseri1,4

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Organ movement during radiation therapy for chest and abdominal tumors poses a significant challenge. Respiratory gating techniques and motion monitoring systems are crucial for precise dose delivery and protecting healthy tissues.

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Biomedical Engineering

Background:

  • Organ movement during respiration complicates radiation therapy for thoracic and abdominal tumors.
  • Respiratory motion causes discrepancies between planned and delivered radiation doses, potentially harming healthy tissues.
  • Accurate radiation delivery requires effective management of intra-fractional tumor motion.

Purpose of the Study:

  • To review technologies and strategies for managing respiratory motion in radiation therapy.
  • To highlight the importance of motion monitoring and respiratory gating systems.
  • To discuss the potential for gated radiotherapy to become a standard treatment for relevant cancers.

Main Methods:

  • Review of existing literature on respiratory motion management techniques in radiotherapy.
  • Discussion of various monitoring systems including fiducials, surface scanners, and spirometers.
  • Exploration of respiratory gating and breath-hold techniques for motion compensation.

Main Results:

  • Respiratory gating systems and motion monitoring are effective in compensating for respiratory motion.
  • These systems enable precise radiation delivery while safeguarding healthy organs.
  • Current technologies, though beneficial, are not universally available in radiotherapy centers.

Conclusions:

  • Respiratory gating is vital for improving the efficacy and safety of radiation therapy for chest and abdominal tumors.
  • Wider adoption of these technologies is anticipated, making gated radiotherapy a routine practice.
  • Continued development and accessibility of motion management systems are essential for advancing cancer treatment.