W. Davis Lee;Scott Penfold;Mark R. Amato;Lou Wainwright
发明人:
W. Davis Lee,Scott Penfold,Mark R. Amato,Lou Wainwright
申请号：
US15823148
公开号：
US20180078790A1
申请日:
2017.11.27
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The invention comprises a method and apparatus for determining state of a positively charged particle, such as a proton, for use in imaging a tumor of a patient prior to and/or concurrent with cancer therapy. The imaging system comprises: (1) a beam transport path of the positively charged particle sequentially passing through a patient, through a first time of flight detector, and, after traversing a pathlength, at least into a second time of flight detector and (2) a beam state determination system configured to: use elapsed time between detection at the first and second time of flight detectors and the pathlength to determine a residual beam energy, which, when compared to a known incident beam energy, is used in generation of an image of the tumor. An optional beam energy degrading element increases time differences between the time of flight detectors.
