Praseodymium-Doped Gadolinium Oxysulfide Advances Toward Chinese National Standard for CT Detectors

Highlights

• China is advancing a national standard for praseodymium-doped gadolinium oxysulfide scintillator arrays used in CT scanners, with draft standard 20260493-T-469 launched January 2026.
• Key drafting organizations include Qiandong Rare Earth Group, Ningbo Qiandong Kehao Optoelectronics, and GRINM Rare Earth New Materials.
• China reports domestic GOS technology breakthroughs began in 2017, reducing reliance on Japanese suppliers Hitachi and Toshiba, though market-share claims lack independent verification.
• A related standard for cerium-doped gadolinium gallium aluminum garnet scintillators already took effect August 1, 2026, signaling a broader rare-earth advanced-materials ecosystem.
• Western rare-earth strategy risks focusing too narrowly on oxide supply while China builds the materials science and manufacturing needed to produce finished CT detector components.