Reto ANSORGE,Mathias LEHMANN,Stefan J. THIEME-MARTI
申请号：
US15449586
公开号：
US20180250531A1
申请日:
2017.03.03
申请国别(地区):
US
年份:
2018
代理人:
摘要：
Systems and methods for determining beam asymmetry in a radiation treatment system using electronic portal imaging devices (EPIDs) without implementation of elaborate and complex EPID calibration procedures. The beam asymmetry is determined based on radiation scattered from different points in the radiation beam and measured with the same region of interest ROI of the EPID.
