News | Radiation Therapy | October 25, 2017

MR-Guided Radiotherapy Prolongs Median Survival for Inoperable, Locally Advanced Pancreatic Cancer

Study indicates higher dosing enabled by MR-guidance combined with daily on-table adaptation led to significant potential clinical benefits for pancreatic cancer patients

MR-Guided Radiotherapy Prolongs Median Survival for Inoperable, Locally Advanced Pancreatic Cancer
MRIdian MRI-guided radiotherapy overall survival for pancreatic cancer patients

Early clinical data suggests nearly 2X prolonged median survival for inoperable, locally advanced pancreatic cancer with MRIdian MR-Guided Radiation Therapy. Image from “Higher Maximum Biological Effective Dose Utilizing Adaptive MRI Guided Radiation Therapy Improves Survival of Inoperable Pancreatic Cancer Patients. Rudra S, Jiang N, Rosenberg S, Olsen J, Lagerwaard F, Bruynzeel A, Parikh P, Bassetti, M, Lee P, ASTRO 2017”

October 25, 2017 — ViewRay Inc. announced outcomes data presented during the recent 2017 Annual Meeting of the American Society for Radiation Oncology (ASTRO), Sept. 24-27 in San Diego. This data highlighted compelling early results using the company's magnetic resonance imaging (MRI)-guided MRIdian radiation therapy system for the treatment of inoperable, locally advanced pancreatic cancer.

MRIdian allows clinicians to see the tumor and nearby soft-tissue anatomy throughout radiation treatments using real-time diagnostic MR-visualization. As a result, MRIdian's on-table adaptive radiation therapy allows doctors to respond to subtle anatomical changes observed on a day-to-day basis and reshape the dose to better match the current contours of the tumor. By more accurately targeting the tumor, and reducing treatment radiation dose to surrounding organs such as the duodenum, small bowel, stomach and liver, a higher and potentially more effective radiation dose may be delivered without increasing the risks of side effects and complications for the patient.

As featured in the ASTRO Scientific Session poster titled "High Dose Adaptive MRI Guided Radiation Therapy Improves Overall Survival of Inoperable Pancreatic Cancer," key data points and findings from the presentation include the following:

  • The study detailed a retrospective review of 42 locally-advanced pancreatic cancer patients treated with MRIdian at four institutions (University of California Los Angeles, University of Wisconsin, VU University Medical Center, Washington University);
  • The authors examined survival and toxicity rates for two unique cohorts of patients. One sample received a higher biologically effective dose (maxBED10 >90), primarily enabled by MRIdian MR-guided on-table adaptive radiotherapy. The other sample received a lower, more conventional biologically effective dose (maxBED10 <90), using non-adaptive therapy;
  • The cohort receiving a higher dose demonstrated a near doubling of median overall survival (Kaplan-Meier estimated median overall survival of 27.8 months compared to 14.8 months); and
  • Patients treated with higher radiation doses reported no grade 3 or higher toxicities (0 percent). In comparison, those patients receiving lower doses via non-adaptive treatments experienced 15.8 percent grade 3 or higher toxicities.

"High-definition MR now enables oncologists to detect the slightest anatomical changes that occur from one day to the next and in real-time while the patient is being treated. Coupled with new adaptive radiation therapy software tools, we create new customized plans in minutes, all while the patient is on the treatment table," said Percy Lee, M.D., senior author and associate professor and vice chair of education for the Department of Radiation Oncology at the David Geffen School of Medicine at UCLA. "The data presented at the 2017 ASTRO Annual Meeting suggests that higher radiation doses with adaptive MR guided radiation therapy may improve survival in pancreatic cancer while maintaining a very favorable toxicity profile. These outcomes warrant further investigations."

The early results highlighted above, along with other data obtained using MRIdian, will be tested in a multi-center, prospective, single-arm clinical trial for inoperable, locally advanced or borderline resectable pancreatic cancer. The trial will be conducted by ViewRay's Clinical Cooperative Think Tank (C2T2), a group of MRIdian medical institutions focused on evidence gathering to support MR-guided radiation therapy.

For more information: www.viewray.com

Related MRI-Guided Radiotherapy Content

WEBINAR: Pancreatic Cancer Outcome Highlights via On-table Adaptive MR-guided Radiation

Related Content

IBA Gathers Experts on Flash Irradiation During ASTRO
News | Proton Therapy | September 17, 2019
IBA (Ion Beam Applications SA, held its third Victoria Consortium Meeting focusing on Flash irradiation at the 2019...
Noninvasive Radioablation Offers Long-term Benefits to High-risk Heart Arrhythmia Patients
News | Radiation Therapy | September 17, 2019
September 17, 2019 — Treating high-risk heart patients with a single, high dose of...
Sun Nuclear Presents Portfolio of Independent Radiotherapy QA Solutions at ASTRO 2019

The PlanCheck module now part of SunCheck, automates plan quality checks, validates treatment plans against requirements, and automatically assesses plan performance versus intent.

News | Quality Assurance (QA) | September 16, 2019
At the 2019 American Society for Radiation Oncology (ASTRO) Annual Meeting, running Sept. 15-18 in Chicago, Sun Nuclear...
Varian Unveils Ethos Solution for Adaptive Radiation Therapy
News | Image Guided Radiation Therapy (IGRT) | September 16, 2019
At the 2019 American Society for Radiation Oncology (ASTRO) annual meeting, being held Sept. 15-18 in Chicago, Varian...
Long-term Hormone Therapy Increases Mortality Risk for Low-PSA Men After Prostate Surgery
News | Prostate Cancer | September 16, 2019
Secondary analysis of a recent clinical trial that changed the standard of care for men with recurring prostate cancer...
The Siemens Somatom Go.Sim computed tomography (CT) system for dedicated radiation therapy planning

The Siemens Somatom Go.Sim computed tomography (CT) system for dedicated radiation therapy planning. Image courtesy of Siemens Healthineers.

News | Computed Tomography (CT) | September 15, 2019
Siemens Healthineers debuted two computed tomography (CT) systems dedicated to radiation therapy (RT) planning at the...
Isoray to Spotlight Cesium-131 Advances at ASTRO Annual Meeting
News | Brachytherapy Systems | September 13, 2019
Isoray Inc. announced it will spotlight the growing cancer treatment applications of Cesium-131 brachytherapy at the...
Akesis Galaxy SRS System Receives FDA 510(k) Clearance
Technology | Radiation Therapy | September 13, 2019
The Akesis Galaxy, a gamma stereotactic radiosurgery system (SRS) with continuous 360-degree rotational technology, has...
Philips Showcases Integrated Radiation Oncology Portfolio at ASTRO 2019
News | Radiation Oncology | September 13, 2019
Philips will showcase its integrated radiation oncology portfolio at the American Society of Radiation Oncology (ASTRO...
RefleXion Highlights Novel Approach to Radiotherapy at ASTRO 2019

The RefleXion X1 Machine without the Gantry Cover. The patented technology incorporates PET imaging data, which enables tumors to continuously signal their location. Image courtesy of Reflexion Medical.

News | Radiation Therapy | September 12, 2019
Therapeutic oncology company RefleXion Medical announced it will showcase the RefleXion X1 Machine at the American...