With the continuous development of science and technologies in China, radiotherapy technology medical field has been very significantly developing, intensity modulated radiation therapy (IMRT) most widely used. This paper first introduces components types two-dimensional matrix detector, ionization chamber detector semiconductor then analyzes dosimetric characteristics detector. In end, various...

background: the aim of this work was to establish how well gel dosimeters performed, as substitutes for brain tissue compared with standard phantom materials such as water, polymethyl-methacrylate (or pmma), a150 plastic and te- liquid phantom material for dosimetry of neutron beams in boron neutron capture therapy. materials and methods: thermal neutron fluence, photon dose and epithermal neut...