MRI in RT – a new vision for radiotherapy

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Realizing the benefits of MRI in the radiotherapy workflow

Despite MRI’s potential for radiotherapy, integrating the modality into the workflow can present challenges – specifically the novelty of a changed workflow and adjusting to the unique requirements for MRI use in radiation therapy versus as a diagnostic modality only .

Whether you are looking for a dedicated system in the RT department or for a shared service with radiology, Philips is committed to facilitating the integration of MRI and to helping you realize the benefits of MRI in radiation therapy.

Learn how successful implementation of MRI in radiotherapy workflows can open new treatment pathways for patients.

Discover the benefits of MRI for radiotherapy

With its exceptional soft-tissue visualization capabilities and wide range of image contrasts, MRI has become a powerful tool to help more precisely define tumor boundaries. This is particularly important as it has been established that there is a high degree of uncertainty in target volume delineation, and it is even reported to represent the largest uncertainty in the entire radiotherapy process for most tumor sites**. Better visualization of the target area and nearby organs-at-risk is a key factor in enhancing target volume delineation. MRI’s expanding role also can be attributed to its functional imaging capabilities, which can inform both target characterization and treatment response.

Excellent soft-tissue contrast

With its superior soft tissue contrast compared to CT, MRI offers exquisite visualization of tumor boundaries and proximity to nearby critical structures.

The ability to tune contrasts can provide even more valuable information about tumor characteristics and tumor extent to facilitate enhanced delineation, and also provides possibilities for dose boosting strategies.
Functional imaging

In addition to anatomical imaging, MRI offers the ability to obtain functional information that is beneficial for tumor detection and delineation, and for response monitoring.

Diffusion-weighted imaging (DWI) for example depicts areas of high signal intensity in soft tissues that are indicative of the restricted water mobility (i.e., diffusion) of a tumor and can also be used to identify lymph nodes. Changes in the tissue’s or lesion’s apparent diffusion coefficient (ADC) can provide insights that help predict the tumor’s response to radiotherapy.
No ionizing radiation

Unlike CT, MRI images are created without using ionizing radiation. This is particularly important when the patients are children, in which exposure to a radiation dose should be minimized to reduce long-term secondary effects. The option to acquire multiple MRI exams paves the road towards “plan-of-the-day” approaches or monitoring treatment response for adaptive strategies.
Density information for dose calculation

Innovative strategies in MRI-only simulation have made it possible to derive CT-like electron density information from MR imaging data. This capability enables physicians to use MRI as the radiotherapy department’s primary imaging modality for specific applications to eliminate tedious and error-prone CT-MR registration and simplify workflows.

Streamline your integration of MRI in the RT workflow

It is very good that we can collaborate with Philips to improve the knowledge on MRI in Radiotherapy in the radiotherapy community"

Marielle Philippens, MD, PhD

Associate Professor at University Medical Center Utrecht, The Netherlands.

Learn from your peers and broaden your network

Successful implementation of MRI in the RT department requires workflow modifications, comprehensive training and collaboration across departments. The volume of information and planning needed can be challenging. Fortunately, our active and engaged user community is committed to advance the use of MRI in radiotherapy. Learn from their insights on implementation and best practices.

NetForum Community

Visit our NetForum online community to learn from your peers around the world. Download imaging protocols and receive tips and tricks on implementing MRI in radiotherapy.

Explore clinical cases that demonstrate the use of MRI for RT planning.

Peer-to-peer training MRI in RT

An ideal opportunity for teams on the path to increase the level of MRI integration in their treatment planning workflows and who are seeking to deepen their knowledge and learn from best practices.

The tailored training by our partnership hospital helps multi-disciplinary teams of radiation oncologists, medical physicists and radiotherapy technicians to successfully implement MRI for treatment planning.

More information

Read experiences on clinical implementation of MRI in Radiotherapy

Approaches for including MRI in radiation therapy planning

Dr. Philippens at University Medical Center Utrecht relates her site’s experience integrating MRI into its RT planning workflow.

Read the full article

What’s the right MRI field strength for radiation therapy planning?
Cervical cancer treatment with 3D MRI-guided brachytherapy

Arhus University Hospital at the forefront of MRI guidance in adaptive cervical cancer radiotherapy.

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Ingenia solution enhances delineation for RT planning

Beaumont Health System brought MRI into its routine RT practice by acquiring Ingenia 3.0T MR-RT.

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MRI and radiotherapy treatment at the same time

A fully integrated Elekta linear accelerator and 1.5T Philips MRI system usher in the clinical era of high field MR-guided radiotherapy.

Read the full article
MR-only simulation in prostate cancer radiotherapy

Clinicians at Finland’s Turku University Hospital have streamlined their workflow for prostate cancer radiotherapy with MR-only simulation.

Read the full article

The confident path to treatment

Philips offers a proven portfolio of dedicated radiotherapy solutions that span diagnostic imaging to treatment planning. By integrating tools, systems, and software – we help you to improve patient care, accelerate time to treatment and enhance patient satisfaction, while maximizing the value of your investment.

Together with Philips, you can make your workflow simple, fast, and precise from start to finish. And be certain you can deliver consistent treatment results.

* Tested in a non-clinical environment with single Pinnacle³ user and a 5-beam IMRT plan. Excluding time for optional manual adjustments.
** Njeh, J Med Phys. 2008, 33(4). Segedin et al., Radiol. Oncol. 2016, 50(3).

MRI in RT – a new vision for radiotherapy

Contact information

Realizing the benefits of MRI in the radiotherapy workflow

Discover the benefits of MRI for radiotherapy

Excellent soft-tissue contrast

Functional imaging

No ionizing radiation

Density information for dose calculation

Streamline your integration of MRI in the RT workflow

Learn from your peers and broaden your network

NetForum Community

MR Body Map

Peer-to-peer training MRI in RT

Read experiences on clinical implementation of MRI in Radiotherapy

Approaches for including MRI in radiation therapy planning

Cervical cancer treatment with 3D MRI-guided brachytherapy

Ingenia solution enhances delineation for RT planning

MRI and radiotherapy treatment at the same time

MR-only simulation in prostate cancer radiotherapy

The confident path to treatment

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