News | Radiation Therapy | August 10, 2017

First Radixact Results Presented at AAPM 2017

Studies of next-generation TomoTherapy treatment delivery system demonstrate faster planning time, high image quality and accuracy in dose calculations

First Radixact Results Presented at AAPM 2017

August 10, 2017 — Accuray Inc. announced that the first studies validating the benefits of the Radixact System were presented at the 59th Annual Meeting of the American Association of Physicists in Medicine (AAPM), held July 30-Aug. 3 in Denver. This smart radiation therapy system represents the next generation in TomoTherapy treatment delivery, significantly increasing treatment speed and ease of use, according to Accuray. The Radixact System enables clinicians to treat a wide range of cancer cases, from initial plan delivery to adaptive therapy to complex retreatments, with precision and increased efficiency.

Research highlights include:

Faster planning and reduced treatment time

A study evaluated the performance of the Radixact System based on a comparison of treatment plans developed for this system and the TomoHDA System. Treatment plans were created using the VoLO Planning Solution for the TomoHDA technology, then recreated using the Accuray Precision Treatment Planning System (TPS) for the Radixact System. Developing optimal plans using the Accuray Precision TPS was much faster, and the treatment beam-on time was reduced by up to 50 percent while maintaining the excellent plan quality. Researchers at the Miami Cancer Institute in Miami, Fla., and Accuray conducted the research.

Proven image quality and stability

The first clinical assessment of Radixact low-dose fan beam megavoltage computed tomography (MVCT) image guidance found there was no statistically significant difference in the noise, uniformity and Hounsfield units (HU) stability over the three-month evaluation period, demonstrating the strength of the system's MVCT image quality and its potential value for dose calculation. Clinicians at the Miami Cancer Institute team conducted the research.

Easy installation

Radixact and TomoTherapy System dosimetric beam characteristics were compared over a six-month period. Radixact data were within the specifications established for the TomoTherapy System and showed a good agreement with the beam model. These results indicate that the beam commissioning process will be straightforward for the Radixact System. Researchers at Miami Cancer Institute and Accuray conducted the study.

The future of radiation therapy

Two studies demonstrated the feasibility of real-time motion management leveraging the TomoTherapy System's helical delivery capabilities.

  • Accuray researchers investigated the potential for adapting the CyberKnife System's Synchrony Respiratory Tracking System to an experimental TomoTherapy System. The study showed Synchrony-like real-time respiratory motion management is technically feasible using TomoTherapy technology, enabling a high level of accuracy when delivering dose to tumors that move with respiration; and
  • The dosimetric impact of using real-time primary jaw/multileaf collimator (MLC) compensation approaches to mitigate motion during TomoHelical delivery was analyzed by a team of researchers from the University of Wisconsin-Madison and Accuray. Dose was calculated for treatment plans assuming 1) no motion, 2) respiratory motion and 3) respiratory motion compensated by adjusting the jaw and MLC position during delivery. The team found that a jaw and MLC compensation approach mitigated the large difference between planned and delivered dose caused by motion, thus enabling reductions in margin.

For more information: www.accuray.com

Related Content

MedStar Georgetown Proton Center Selects RayStation for Treatment Planning
News | Treatment Planning | August 17, 2017
August 17, 2017 — The proton center at MedStar Georgetown University Hospital will utilize RayStation for planning on
DOSIsoft Releases ISOgray Proton Therapy Treatment Planning System
Technology | Treatment Planning | August 15, 2017
DOSIsoft SA announced the official release, with CE marking, of ISOgray Treatment Planning System (TPS) release 4.3 for...
Virtual Phantoms Inc. Releases VirtualDose-IR
Technology | Radiation Dose Management | August 07, 2017
Virtual Phantoms Inc. announced the release of VirtualDoseIR, a tool for assessing organ dose from interventional...
Clinical Data Supports Use of Xoft System for Endometrial Cancer
News | Brachytherapy Systems | August 03, 2017
Researchers presented clinical data supporting use of the Xoft Axxent Electronic Brachytherapy (eBx) System for the...
Aktina’s interchangeable cones are lightweight and extremely accurate
News | Radiation Therapy | August 02, 2017
Aktina Medical announced a collaboration with Philips Medical Systems and Elekta Instruments for SRS interlocking at...
GE’s DoseWatch is a digital informatics solution that automatically collects, monitors and reports on radiation dose indices for diagnostic imaging exams
News | Radiation Dose Management | July 31, 2017
GE Healthcare announced that it has licensed computed tomography (CT) organ dosimetry technology developed at Duke...
News | Image Guided Radiation Therapy (IGRT) | July 31, 2017
Elekta’s magnetic resonance radiation therapy (MR/RT) system will be the subject of 21 abstracts at the 59th American...
Accuray Receives 510(k) Clearance for iDMS Data Management System
Technology | Oncology Information Management Systems (OIMS) | July 31, 2017
July 31, 2017 — Accuray Inc. announced it has received 510(k) clearance from the U.S.
more healthcare providers and patients are choosing options such as Gamma Knife stereotactic radiosurgery
News | Radiation Therapy | July 31, 2017
Each year, up to 650,000 people who were previously diagnosed with various forms of cancer will develop brain...
Overlay Init