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Experimental prototype used in this work. A 10 × 10 × 10 cm3 cube of green plastic scintillator (A) was inserted inside a cylindrical acrylic phantom (B) and imaged using a plenoptic camera (C) with the help of a 90° mirror (D) to enable radiation shielding of the camera. A beam's eye view projection of the incident radiation field was also acquired using the linac portal imager (E).
