Spectrophotometry of PRESAGETM polyurethane dosimeters
نویسندگان
چکیده
Spectrophotometry has been the conventional technique for measuring optical density of irradiated gels [1]. Later, magnetic resonance imaging (MRI) was found to be capable of imaging radiation dose patterns in 3D [2]. Optical methods are still under investigation in the form of optical tomography [3– 6]. They promise to give three dimensional dose distributions without the cost attached to MRI. Spectro-photometry has an important role in this context. It provides a benchmark for optical density measurements which are then used to calibrate optical tomography results. Spectrophotometry measures transmittance T:
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