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Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

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Updated: Jul 8, 2025

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Published on: June 7, 2015

MRI-Guided Radiation Therapy Systems.

Daniel A Low¹, B Gino Fallone², Bas W Raaymakers³

¹Radiation Oncology, UCLA, Los Angeles, CA..

Seminars in Radiation Oncology

|December 17, 2023

Summary

This summary is machine-generated.

Commercial vendors have developed innovative MR-Guided Radiation Therapy (MRIgRT) systems by integrating MRI with linear accelerators. This paper details three distinct commercial MRIgRT systems, aiding understanding of their configurations and scientific literature.

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Area of Science:

Medical Physics
Radiation Oncology
Biomedical Engineering

Background:

Conventional linear accelerators face challenges integrating with Magnetic Resonance Imaging (MRI) for radiation therapy.
Commercial vendors have pioneered novel solutions to combine MRI and linear accelerator (Linac) technologies for advanced cancer treatment.
The development of MR-Guided Radiation Therapy (MRIgRT) represents a significant technological advancement in oncology.

Purpose of the Study:

To provide a comprehensive overview of the technical configurations of three leading commercial MRIgRT systems.
To elucidate the distinct approaches taken by vendors in integrating MRI and Linac functionalities.
To equip readers with the knowledge to better interpret scientific literature on commercial MRIgRT systems.

Main Methods:

Analysis of the integration strategies employed by three distinct commercial MRIgRT systems.
Comparison of different magnetic field strengths (0.35T to 1.5T) utilized in these systems.
Examination of variations in system design philosophies, including patient support and treatment planning workflows.

Main Results:

Each commercial MRIgRT system exhibits unique integration techniques for MRI and Linac components.
Significant variability exists in the chosen magnetic field strengths and overall system design philosophies across vendors.
Different approaches to patient handling and treatment planning are evident in the analyzed systems.

Conclusions:

Understanding the specific configurations of commercial MRIgRT systems is crucial for interpreting research findings.
The diversity in system design reflects different engineering solutions to the challenges of MRIgRT integration.
This comparative analysis facilitates a deeper comprehension of the evolving landscape of image-guided radiation therapy.