Jul 2, 2019 - A new small gap ion chamber comes in handy for flash
Flash radiotherapy using protons and heavier ions has become a hot topic of research. It offers the promise of improved long-term outcomes and faster patient throughput. Yet it raises several interesting challenges for the system developers. One of the obvious ones being how to measure beams which have higher intensity than those used today. This causes problems for established ion chamber technology due to ion recombination losses. While other detectors are in development, ion chambers remain the trusted technology.
The new Pyramid IC64-6 chamber provides a tool for researchers in the field. Featuring small chamber gaps, high position resolution, and different fill gases. This allows it to operate even when the particle beams are narrow and have high charge density. Thin polyimide electrodes with 300A gold patterning absorbs almost no beam energy. The new IC64-6 is capable of being the new gold standard for flash therapy.
Proton therapy is well established for the treatment of localized cancer tumors, especially when there are vital organs close by. This healthy tissue sparing makes it the method of choice for maintaining quality of life and especially for treating children. The proton beam delivery is fast and painless.
Proton therapy centers worldwide use Pyramid sensors, electronics, and software. Pyramid offers products for complete systems, sub-systems, or components. For more information see our Pencil Beam Scanning Brochure
The ionization chamber or ion chamber is conceptually the simplest of all gas-filled radiation detectors, and is widely used for the detection and measurement of ionizing radiation. It is the preferred device for proton therapy dose and beam position monitoring due to a combination of robustness, gain stability, very low material budget in the beam path and availability of large continuous sensing areas.
Pyramid offers a wide range of ionization chambers for proton and heavy ion therapy applications. Advanced electrode coating and patterning allows the creation of precise strip and pixel patterns for position readout. A wide range of sensitive areas and electrode gaps is provided to suit different system geometries and beam currents.