System and method for control of external beam radiation

Patent metadata

Field	Value
Publication number	US-9486646-B2
Application number	US-201414473858-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Aug 29, 2014
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A system for radiation therapy includes an ionizing radiation source for producing a beam oriented along an axis aligned with a target volume for delivering ionizing radiation to the target volume along a beam path and at a dose rate, wherein the beam includes a soft spectrum and a hard spectrum. The system also includes a filter arranged within the beam path and including a central aperture that is free of beam-filtering material, wherein the central aperture is surrounded by a beam-filtering material having a thickness dimension selected and positioned in the beam path to highly attenuate the soft spectrum of the beam to reduces external scatter of the beam and allow a majority of the hard spectrum of the beam to pass through the central aperture unfiltered. The beam path is free of beam-filtering material arranged to attenuate a central portion of the beam.

First claim

What is claimed is:

1. A radiation therapy system comprising:
an ionizing radiation source for producing a beam oriented along an axis aligned with a target volume for delivering ionizing radiation to the target volume along a beam path and at a dose rate, wherein the beam includes a soft spectrum and a hard spectrum;
a filter arranged within the beam path and including a central aperture that is free of beam-filtering material, wherein the central aperture is surrounded by a be…

Assignees

• Wisconsin Alumni Res Found

Inventors

• Paliwal Bhudatt
• Yan Yue

Classifications

• A61N5/1067

  Human Necessities · mapped topic

• A61N2005/1095

  Human Necessities · mapped topic

• A61N5/1042 Primary

  Human Necessities · mapped topic