RU2015122382A - Сцинтилляционный материал - Google Patents

Сцинтилляционный материал Download PDF

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RU2015122382A
RU2015122382A RU2015122382A RU2015122382A RU2015122382A RU 2015122382 A RU2015122382 A RU 2015122382A RU 2015122382 A RU2015122382 A RU 2015122382A RU 2015122382 A RU2015122382 A RU 2015122382A RU 2015122382 A RU2015122382 A RU 2015122382A
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gamma
photon
detector
scintillation material
range
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RU2015122382A
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RU2656315C2 (ru
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Корнелис Рейндер РОНДА
Якобус Герардус БУРЕКАМП
Сандра Йоханна Мария Паула СПОР
ДОНГЕН Анн-Мари Андрее ВАН
Херфрид Карл ВЕЧОРЕК
Вильхельмус Корнелис КЕУР
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Конинклейке Филипс Н.В.
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Claims (24)

1. Сцинтилляционный материал гранат с по существу керамической или поликристаллической структурой и временем затухания менее чем 300 нс, имеющий состав, представленный формулой: Gd3-x-yLuxCey)(Al5-zGaz-aLua)O12; причем x находится в диапазоне от 0 до 0,6, причем y находится в диапазоне от 0,003 до 0,03 и соответствует количеству церия в диапазоне от 0,1 мол % до 1,0 мол %, причем z находится в диапазоне от 1,5 до 3,5, причем a находится в диапазоне от 0 до 0,3.
2. Сцинтилляционный материал по п. 1, причем сцинтилляционным материалом-основой является гранат, имеющий состав, представленный формулой: (Gd-2,7-yLu0,3Cey)Al2,5Ga2,47Lu0,03)O12, причем y находится в диапазоне от 0,003 до 0,03 и соответствует количеству церия в диапазоне от 0,1 мол % до 1,0 мол %.
3. Сцинтилляционный материал по п. 2, имеющий время затухания менее чем 300 нс.
4. Сцинтилляционный материал по п. 1, причем состав регулируется так, что плотность состава находится в диапазоне от 5 до 8 г/см3.
5. Детектор гамма-фотонов, содержащий сцинтилляционный материал по п. 1 в оптической связи с оптическим детектором.
6. Детектор гамма-фотонов по п. 5, причем оптический детектор (3) имеет активную площадь менее чем 5 см2.
7. Детектор гамма-фотонов по п. 5, причем площадь приема гамма-фотонов составляет менее чем 5 см2.
8. Детектор гамма-фотонов по п. 5, причем оптический детектор является детектором с фотоэлектронным умножителем (ФЭУ).
9. Детектор гамма-фотонов по п. 8, причем пик оптической чувствительности детектора с ФЭУ находится в диапазоне от 450 нм до 700 нм.
10. Детектор гамма-фотонов по п. 5, причем оптический детектор является твердотельным полупроводниковым оптическим детектором.
11. Детектор гамма-фотонов по п. 10, причем твердотельный полупроводниковый оптический детектор является кремниевый оптическим детектором, имеющим структуру n+ - i - p+, и n+ слой расположен ближе к границе раздела со сцинтилляционным материалом, чем p+ слой.
12. Система визуализации ПЭТ (позитронно-эмиссионной томографии), имеющая поле сканирования и содержащая по меньшей мере два детектора гамма-фотонов по п. 5, причем детекторы гамма-фотонов расположены радиально вокруг поля сканирования и выполнены с возможностью принимать гамма-фотоны из упомянутого поля сканирования.
13. Система визуализации ПЭТ с измерением времени пролета частиц (TOF) по п. 12.
14. Система визуализации ПЭТ, имеющая поле сканирования и содержащая:
множество детекторов гамма-фотонов, расположенных радиально вокруг поля сканирования и выполненных с возможностью принимать гамма-фотоны из упомянутого поля сканирования;
причем каждый детектор гамма-фотонов содержит сцинтилляционный материал по п. 1 в оптической связи с оптическим детектором с фотоэлектронным умножителем;
причем система визуализации ПЭТ имеет площадь считывания гамма-фотонов менее чем 33 см2.
15. Система визуализации ПЭТ, имеющая поле сканирования и содержащая:
множество детекторов гамма-фотонов, расположенных радиально вокруг поля сканирования и выполненных с возможностью принимать гамма-фотоны из упомянутого поля сканирования;
причем каждый детектор гамма-фотонов содержит сцинтилляционный материал по п. 1 в оптической связи с твердотельным полупроводниковым оптическим детектором;
причем система визуализации ПЭТ имеет площадь считывания гамма-фотонов менее чем 10 см2.
16. Способ создания изображения ПЭТ, указывающего на распределение радиоактивной метки в пределах поля сканирования, причем способ содержит: введение радиоактивной метки субъекту,
ожидание в течение заранее заданного периода поглощения после введения радиоактивной метки и отображение по меньшей мере части тела упомянутого субъекта с помощью системы визуализации ПЭТ по п. 12.
17. Способ обнаружения по меньшей мере одного гамма-фотона, содержащий этапы: приема по меньшей мере одного гамма-фотона с помощью сцинтилляционного материала по п. 1; обнаружение сцинтилляционного света, сгенерированного упомянутым сцинтилляционным материалом, с помощью упомянутого оптического детектора в оптической связи с упомянутым сцинтилляционным материалом и генерирование электрического выходного сигнала от упомянутого оптического детектора в ответ на по меньшей мере один принятый гамма-фотон.
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