小型化optical fiber光纤医用辐射剂量计
Miniaturized fiber dosimeter of medical radiations on a narrow optical fiber
摘要：
光纤剂量计近年来在医学辐射剂量的活体实时测量方面引起了人们的极大兴趣。本文介绍了第一个小型化的光纤剂量计集成在一个狭窄的125微米外径的光纤。小型化是可能的，通过利用漏波光学天线的概念接口的反射器和光纤，并通过利用窄石英光纤的低传播损耗和高检测产量的单像素光子计数器。在6 MV的辐照下，我们的光纤探针导致线性检测响应，在空气中的信噪比高达190。虽然实施与无机增透器和纤维，我们的光纤探头引起的强度对比度在撞击辐射低于0.9%的面积为0.153平方毫米。我们的纳米光学驱动方法为超紧凑型光纤剂量计开辟了道路，即使使用非水等效光纤和辐射过程中的足迹也可以忽略不计。依赖于电离辐射（光子或带电粒子）的一大组疗法可能会受益于这种纳米光学驱动技术。
英文摘要：
Fiber dosimeters have recently drawn much interest for measuring in vivo and in real time the dose of medical radiations. This paper presents the first miniaturized fiber dosimeter integrated at the end of a narrow 125-micron outer diameter optical fiber. Miniaturization is rendered possible by exploiting the concept of a leaky wave optical antenna for interfacing the scintillators and the fiber, and by taking advantage of the low propagation loss of narrow silica fibers and high detection yield of single-pixel photon counters. Upon irradiation at 6 MV, our fiber probe led to a linear detection response with a signal-to-noise ratio as high as 190 in air. Although implemented with inorganic scintillators and fiber, our fiber probe induces an intensity contrast in the impinging radiation lower than 0.9% over an area of 0.153 mm2. Our nano-optically driven approach opens the route for ultra-compact fiber dosimeters of negligible footprint in the radiotherapeutic processes, even with non-water equivalent fibers and scintillators. A large panel of therapies relying on ionizing radiations (photons or charged particles) may take benefit of this nano-optically-driven technology.
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