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MRI-Guided Adaptive Radiation Therapy.

Cecil M Benitez1, Michael D Chuong2, Luise A Künzel3

  • 1Department of Radiation Oncology, UCLA Medical Center, Los Angeles, CA.

Seminars in Radiation Oncology
|December 17, 2023
PubMed
Summary
This summary is machine-generated.

Magnetic resonance imaging-guided radiation therapy (MRIgRT) offers superior soft tissue visualization for improved cancer treatment planning. Addressing technical and workflow challenges is key to wider adoption of this advanced radiotherapy technique.

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Area of Science:

  • Radiotherapy and Medical Imaging

Background:

  • Magnetic resonance imaging-guided radiation therapy (MRIgRT) enhances soft tissue contrast compared to computed tomography (CT)-based image-guided RT.
  • Improved visualization aids in precise targeting and protection of surrounding healthy tissues, potentially improving oncological outcomes.

Purpose of the Study:

  • To review the workflow of adaptive MRIgRT planning.
  • To highlight the components of adaptive MRIgRT, from simulation to delivery.
  • To identify factors influencing the increased utilization of MRIgRT.

Main Methods:

  • The review outlines the adaptive MRIgRT planning workflow.
  • Key steps include simulation imaging, daily MRI, isocenter shift identification, contouring, plan optimization, quality control, and treatment delivery.

Main Results:

  • MRIgRT provides superior soft tissue contrast, enabling safer dose escalation and adaptive planning.
  • The adaptive workflow integrates daily MRI for precise treatment adjustments.

Conclusions:

  • Wider adoption of MRIgRT depends on overcoming technical limitations.
  • Addressing treatment efficacy, cost-effectiveness, and workflow training are crucial for advancing MRIgRT utilization.