ABSTRACT
Modern radiotherapy dosimetry depends on the accuracy of radiation delivery to the target volume in the field of large dose gradients and requires high-precision dosimeters in its dose measurements. Dosimeters should therefore be small enough for high spatial resolution in their dose measurements and have tissueequivalent characteristics for accurate measurement without the need for complex calibration processes [1–3]. Also, radiotherapy dosimetry requires multidimensional dose measurement in real time [3]. In these respects, the plastic scintillation dosimeter (PSD) has a sufficiently small sensitive volume to obtain high measurement resolution in regions of high dose gradients; it also has water- or tissue-equivalent characteristics to avoid complex conversions arising from material differences https://www.w3.org/1998/Math/MathML"> [ 4,5 ] https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315372655/b2ce6ef4-5376-4be5-9af3-87940a039f56/content/eq1514.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> . Therefore, PSD can offer reproducibility, linear responses to dose and dose rate, energy independence, absolute dose measurements, relative dose measurements, and resistance to radiation damage [6–8]. Additionally, a multidimensional PSD consisting of PSD arrays can provide multidimensional dose distributions of therapeutic radiation beams in real time [9].
