Patent · US Active

Using isodose surfaces for optimizing dose distribution in radiation treatment planning

US11278738B2 · kind B2 · utility

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1References

18Claims

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Assignee

VARIAN MEDICAL SYSTEMS INTERNATIONAL AG · CH

Inventors

Esa Kuusela · Espoo, FI
Hannu Laaksonen · Espoo, FI
Lauri Halko · Helsinki, FI

Key dates

Filing date	Mar 29, 2019
Grant date	Mar 22, 2022
Priority date	—
Expiry date	Sep 20, 2039

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61N5/1045
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

Cost functions and cost function gradients for use in radiation treatment planning can be computed based on an approximation of an “isodose” surface. Where a clinical goal is expressed by reference to a threshold isodose surface, a corresponding cost function component can be defined directly by reference to that isodose surface, and a corresponding contribution to the cost function gradient can be approximated by identifying voxels that are intersected by the threshold isodose surface and approximating the gradient of the dose distribution within each such voxel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.