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Systems And Methods For Isotopic Source External Beam Radiotherapy
专利权人:
发明人:
James F. Dempsey,Iwan Kawrykow
申请号:
US14617652
公开号:
US20150165233A1
申请日:
2015.02.09
申请国别(地区):
US
年份:
2015
代理人:
摘要:
The subject matter described herein provides methods for developing an IMRT treatment plan for a radiotherapy system. In one aspect, the method can include providing initial treatment parameters. These parameters can include a number of isotopic beams, a transmission angle for each beam, a prescribed dose for a target, and dose volume histogram constraints. The method can further include determining an initial fluence map including one or more beamlets. The initial fluence map can specify a fluence value for each beamlet. The method can further include determining a delivery sequence for the fluence values in the initial fluence map. The delivery sequence can include one or more apertures formed by the leaves of a collimator. These apertures can have a specified size constrained to substantially less than a maximum size associated with the collimator, when the isotopic beam is near a critical structure. Related apparatus and systems are also described.
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