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Photographic film is widely used for the dose distribution verification of intensity-modulated radiation therapy (IMRT). However, analysis for verification of the results is subjective. We present a novel method for marking the isocenter using irradiation from a megavoltage (MV) beam transmitted through slits in a multi-leaf collimator (MLC).We evaluated the effect of the marking irradiation at 500...
In radiation therapy, 3D-dosimetry is needed for quality assurance of complicated irradiation geometries. Here, a preliminary evaluation of a combined system for dosimetry based on radiation sensitive gels, ultrasonic elastography and a plane strain inverse algorithm is presented. A block of gel was irradiated along one of its axes producing a stiff rod-like region. Good stiffness contrast between...
The irradiation of blood products is indispensable in order to avoid the otherwise associated Graft-Versus-Host-Disease. Normally a dose of 30 Gy is considered to be adequate with a minimum acceptable value of 25 Gy. Approximately 67 blood irradiators are now in operation in Germany. By means of thermoluminescence-dosimeters both dose and dose distribution in the beaker were determined in 15 institutes...
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