Temperature monitoring is extremely important during thermotherapy. Fiber‐optic temperature sensors are preferred because of their flexibility and immunity to electromagnetic interference. Although many types of fiber‐optic sensors have been developed, clinically adopting them remains challenging. Here, we report a silica fiber‐based radiometric thermometer using a low‐cost extended InGaAs detector to detect black body radiation between 1.7 and 2.4 μm. For the first time, this silica fiber‐based thermometer is capable of measuring temperatures down to 35°C, making it suitable for monitoring hyperthermia during surgery. In particular, the thermometer has potential for seamless integration with current silica fiber catheters, which are widely used in laser interstitial thermotherapy. The feasibility, capability and sensitivity of tracking tissue temperature variation were proved through ex vivo tissue studies. After further improvement, the technology has the potential to be translated into clinics for monitoring tissue temperature.

中文翻译：

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开发用于热疗的亚低温可测量纤维辐射温度计。

在热疗期间，温度监控非常重要。首选光纤温度传感器，因为它们具有灵活性和抗电磁干扰能力。尽管已经开发了多种类型的光纤传感器，但是在临床上采用它们仍然具有挑战性。在这里，我们报告了一种基于石英纤维的辐射温度计，它使用低成本的扩展InGaAs检测器来检测1.7至2.4μm之间的黑体辐射。这款基于石英纤维的温度计首次能够测量低至35°C的温度，使其适合在手术过程中监测体温过高。特别是，该温度计具有与目前的石英纤维导管无缝集成的潜力，该导管广泛用于激光间隙热疗中。可行性，通过离体组织研究证明了跟踪组织温度变化的能力和敏感性。经过进一步改进，该技术有可能被转化为用于监测组织温度的诊所。