@misc{oai:repo.qst.go.jp:00076884, author = {Yajima, Kazuaki and Eunjoo, Kim and Tani, Kotaro and Kurihara, Osamu and Yajima, Kazuaki and Eunjoo, Kim and Tani, Kotaro and Kurihara, Osamu}, month = {Sep}, note = {A new thyroid monitor using multiple Gd3(Al,Ga)5O12 (GAGG) detectors with each crystal size of one cubic centimeter has been developed. The GAGG detectors can be placed around the front surface of the human neck to increase the sensitivity for 131I in the thyroid, especially with the intension of measuring infants and small children. The arrangement of 8 GAGG detectors was tested using age-specific phantoms with thyroid shaped container filled with 131I solution, demonstrating that the minimum detectable activity (MDA) of the new monitor was lower than that of a conventional NaI(Tl) spectrometer (a crystal size of 2.54 cm in diameter x 2.54 cm in thickness)., 19th International Conference on Solid State Dosimetry}, title = {A new concept thyroid monitor using multiple GAGG detectors for the population monitoring in a nuclear accident}, year = {2019} }