Technology | August 02, 2011

First Liquid-Filled 2-D Ion Chamber Array From PTW Assesses SBRT Quality Assurance

Aug. 2, 2011 — The accurate determination of dose in very small fields poses great challenges for high-precision radiation therapy. With Octavius Detector 1000, which was developed for the dosimetric verification of very small fields, PTW has developed a technology to aid stereotactic body radiation therapy (SBRT) and stereotactic radio surgery (SRS) quality assurance (QA).

The new liquid-filled 2-D ion chamber array combines the advantages of ion chambers and solid state detectors, offering a spatial resolution and field coverage as only known from film measurement. It will be on showcase at the Joint AAPM/COMP Meeting in Vancouver, Canada, July 31 – Aug. 4 2011.

??The Octavius Detector is the first commercially available 2-D flat-panel detector array to employ liquid-filled ionization chambers.

Liquid-filled ionization chambers show an excellent signal-to-noise ratio even for very small volumes. They are thus capable of providing high spatial resolution, which is particularly useful for dose determination in very small radiation fields and high dose gradients as encountered in stereotaxy and radiosurgery. Other than solid state detectors, however, liquid-filled ion chambers have a density very close to water and a superior surface coverage. These particular characteristics put them in the same line with dosimetric films. ??

With 977 liquid-filled ionization chambers, each as small as 2 x 2 x 0.4 mm, and a spatial resolution of only 2.5 mm, the array delivers highly accurate dose measurements for field sizes of less than 1 cm x 1 cm up to 10 cm x 10 cm. It will be available by the end of 2011.??

For more information:

Related Content

RaySearch Developing RayCommand Treatment Control System for U.K. Proton Therapy Facility
Technology | Radiation Therapy | December 10, 2018
RaySearch has decided to develop a treatment control system, RayCommand, to act as a link between its RayStation...
Mirada Medical Joins U.K. Consortium Exploring Healthcare AI
News | Artificial Intelligence | December 04, 2018
Mirada Medical, a leading global brand in medical imaging software, will form part of an artificial intelligence (AI)...
Ohio State University to Open Region’s First Proton Therapy Facility

Image courtesy of The Ohio State University James Comprehensive Cancer Center

News | Proton Therapy | November 21, 2018
The Ohio State University Wexner Medical Center and the Arthur G. James Cancer Hospital and Richard J. Solove Research...
Immune Inflammatory Levels Linked to Disease-Free Survival in Prostate Cancer
News | Prostate Cancer | November 19, 2018
Data from a validation study of a high-risk prostate cancer trial suggests that higher levels of pretreatment...
Merit Medical Completes Acquisition of Cianna Medical
News | Women's Health | November 14, 2018
Disposable device manufacturer Merit Medical Systems Inc. announced the closing of a definitive merger agreement to...
Videos | ASTRO | November 08, 2018
ITN Editor Dave Fornell took a tour of some of the most innovative technologies on display on the expo floor at the 
The Fujifilm FCT Embrace CT System displayed for the first time at ASTRO 2018.
360 Photos | 360 View Photos | November 07, 2018
Fujifilm's first FDA-cleared compu...
This is the Siemens Magnetom Sola RT edition 1.5T MRI system optimized for radiation therapy displayed for the first time since gaining FDA clearance in 2018. It was displayed at the American Society for Radiotherapy and Oncology (ASTRO) 2018 annual meeting. Read more about this system at ASTRO 2018. #ASTRO18 #ASTRO2018
360 Photos | 360 View Photos | November 07, 2018
This is the Siemens Magnetom Sola RT edition 1.5T MRI system optimized for...