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Noninvasive In Vivo Small Animal MRI and MRS: Basic Experimental Procedures
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MRI basics for radiation oncologists.

Uulke A van der Heide1,2, Marloes Frantzen-Steneker1, Eleftheria Astreinidou2

  • 1Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, the Netherlands.

Clinical and Translational Radiation Oncology
|July 26, 2019
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Summary

Magnetic Resonance Imaging (MRI) is vital for radiation oncology, improving tumor delineation and image guidance. This review highlights critical MRI considerations for radiation oncologists, emphasizing treatment position accuracy and safety protocols.

Keywords:
Geometrical fidelityMR-guided radiotherapyMRIRadiotherapy planning

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiology

Background:

  • Magnetic Resonance Imaging (MRI) is increasingly adopted in radiation oncology for precise tumor and organ-at-risk delineation.
  • Its integration supports enhanced image guidance during radiotherapy treatments.

Purpose of the Study:

  • To review key issues concerning MRI interpretation for radiation oncologists.
  • To provide guidance on optimizing MRI for radiotherapy workflows, including MRI-only approaches.

Main Methods:

  • Review of current literature and practices regarding MRI in radiation oncology.
  • Discussion of technical aspects including image acquisition, distortions, and geometrical fidelity.

Main Results:

  • MR images must be acquired in the treatment position using standard radiotherapy devices for accurate delineation.
  • Dedicated MRI scan protocols are essential to minimize image distortions and ensure geometrical fidelity.
  • Safety screening for magnetic field and radiofrequency radiation hazards is crucial for patients and staff.

Conclusions:

  • Adherence to specific protocols ensures the accurate and safe use of MRI in radiation oncology.
  • Optimized MRI acquisition and safety measures are paramount for effective radiotherapy planning and delivery.