نتایج جستجو برای: pinpoint chamber
تعداد نتایج: 45918 فیلتر نتایج به سال:
Surrey Space Centre Department of Electrical and Electronic Engineering Faculty of Engineering and Physical Sciences Doctor of Philosophy
We present a means of comparing texts to highlight their informational differences. The system builds a Directed Acyclic Graph representation of the combined WordNet hypernym hierarchies of the nouns. Comparison of these yields a graph which distinguishes minor lexical & major content differences.
Agreement between planned and delivered dose distributions for patient-specific quality assurance in routine clinical practice is predominantly assessed utilizing the gamma index method. Several reports, however, fundamentally question current IMRT QA practice due to poor sensitivity and specificity of the standard gamma index implementation. An alternative is to employ dose volume histogram (D...
The head and neck is a challenging anatomic site for intensity-modulated radiation therapy (IMRT), requiring thorough testing of planning and treatment delivery systems. Ideally, the phantoms used should be anatomically realistic, have radiologic properties identical to those of the tissues concerned, and allow for the use of a variety of devices to verify dose and dose distribution in any targ...
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