نتایج جستجو برای: megavoltage x
تعداد نتایج: 623540 فیلتر نتایج به سال:
One of the newest developments within radiotherapy is integration Magnetic Resonance (MR) scanners and Megavoltage X-rays from linear accelerators into new MR-Linacs. Some MR-Linacs are able to perform gated treatments based on continuously acquired 2D MR images taken during dose delivery, which has potential reduce margins required for tumor coverage. We have developed a dosimetry system that ...
INTRODUCTION Correct target positioning is crucial for accurate dose delivery in breast radiotherapy resulting in utilisation of daily imaging. However, the radiation dose from daily imaging is associated with increased probability of secondary induced cancer. The aim of this study was to quantify doses associated with three imaging modalities and investigate the correlation of dose and varying...
The imaging characteristics of an arc-shaped xenon gas ionization chamber for the purpose of megavoltage CT imaging were investigated. The detector consists of several hundred 320 microm thick gas cavities separated by thin tungsten plates of the same thickness. Dose response, efficiency and resolution parameters were calculated using Monte Carlo simulations. The calculations were compared to m...
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