A dye used in millions of magnetic resonance imaging (MRI) scans worldwide can be poison for people with serious kidney problems and cause a debilitating, incurable and sometimes fatal disease called neophrogenic systemic fibrosis (NSF).
Dyes based on gadolinium — the magnetic ion blamed for the condition — are safe for most people, said David Seidenwurm, a neuroradiologist with Radiological Associates of Sacramento. But for people with severe kidney problems, the ion can poison the patient by causing collagen to build up in tissues.
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