Scientific Results

Radiation dosimetry with fiber Bragg gratings

Year: 2014

Authors: Avino S., D’Avino V., Giorgini A., Pacelli R., Liuzzi R., Cella L., Gagliardi G., De Natale P.

Autors Affiliation: Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), via Campi Flegrei, 34 – Comprensorio A. Olivetti, Pozzuoli (Naples) 80078, Italy; Consiglio Nazionale delle Ricerche, Institute of Biostructure and Bioimaging,
via Tommaso De Amicis, 95, 80131, Napoli, Italy: Università di Napoli Federico II, Dipartimento di Diagnostica per Immagini e Radioterapia, via Pansini 5, 80131, Napoli, Italy

Abstract: The measurement and monitoring of radiation dose delivered in patient tissues is a critical aspect in radiation therapy. Various dosimeters have proven effective in measuring radiations at low doses. However, there is a growing demand for new dosimeters based on small, non-invasive and high resolution devices. Here we report on a miniature dosimeter based on an optical fiber cavity. We demonstrate an ultimate detection limit of 160 mGy with an effective interaction region of 6 x 10-4 mm3. Due to its reliability, compactness and biomedical dose level sensitivity, our system shows itself suitable for applications in radiation therapy dosimetry.

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KeyWords: Dosimetry; Fiber Bragg gratings; Radiotherapy; Sensors, Detection limits; Dose levels; Effective interactions; Growing demand; High resolution; Low dose; Optical fiber cavity; Radiation therapy dosimetry; Dosimeters
DOI: 10.1117/12.2059067

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