Patent · US Active

System and method for scanned ion beam interplay effect mitigation using random repainting

US9981144B2 · kind B2 · utility

1Cited by

0References

20Claims

0Family size

Assignee

VARIAN MEDICAL SYSTEMS PARTICLE THERAPY GMBH & CO. KG · DE

Inventor

Markus Bach · Overath, DE

Key dates

Filing date	Sep 30, 2016
Grant date	May 29, 2018
Priority date	—
Expiry date	Sep 30, 2036

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61N2005/1087
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

Interference of dose application in scanned ion beam therapy and organ motion, also called interplay effect, may lead to dose deviations at target volumes. Current repainting methods are susceptible to artifacts due to a predominant scanning direction, ranging from fringed field edges to under and overdosed regions (hot and cold spots). To overcome the difficulties inherent in the repainting techniques of conventional proton therapy systems, new random repainting techniques are described herein for mitigating the under-dose and/or over-dose pattern inherent in existing repainting techniques using a random repainting approach that randomly selects spot locations within the target area.

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