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In this preliminary work, we present Magnetic Resonance Elastography (MRE) as a tool to study the mechanical properties of `MAGIC' polymer-gel dosimeter. For this purpose, a set of gels were submitted to radiation doses from 10 to 30 Gy, and their responses to shear wave excitation were studied. We investigated the dynamic mechanical response (shear modulus) of the gel to driver frequency range of...
This work presents Vibro-acoustography (VA) as a tool to visualize absorbed dose distributions in a polymer gel dosimeter. VA uses the radiation force of focused ultrasound to vibrate a small region of the sample. Different modalities of VA were used to investigate the feasibility of this technique to evaluate dose distribution in irradiated `MAGIC' polymer gel. A phantom was designed using this polymer...
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...
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