The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2003
Filed:
Nov. 09, 1999
James L. Robar, Vancouver, CA;
Brenda G. Clark, Vancouver, CA;
The University of British Columbia, Vancouver, CA;
Abstract
A method and system for recording and verifying three-dimensional dose distributions administered during stereotactic radiosurgery using an anthropomorphic film phantom are provided. The method provides a phantom ( ) including a head-shaped hollow shell ( ), which mounts a cassettebox therein ( ), which in turn may contain a simulated lesion ( ) similar to the lesion to be treated. An image is taken of the head-shaped shell including the cassettebox and the simulated lesion using, for example, a CT or MRI scanner. The image is used to develop a stereotactic radiosurgery plan, which includes creating an intended three-dimensional dose distribution map to “treat” the simulated lesion. Thereafter, the simulated lesion is removed from the cassettebox and the cassettebox is loaded with multiple layers of film ( ) separated by spacers ( ) having tissue-equivalent characteristics. Then, the three-dimensional radiation dose described by the stereotactic radiosurgery plan is delivered to the head-shaped shell including the cassettebox loaded with the film. Next, the multiple layers of film are removed from the cassettebox, and multiple dose images are obtained based on the film. Thereafter, based on the multiple dose images, a measured three-dimensional dose distribution map is obtained. The measured three-dimensional dose distribution map is coregistered in software with the intended three-dimensional dose distribution map that was previously developed, to ascertain any discrepancies therebetween to determine inaccuracies included in the original stereotactic radiosurgery plan.