It's unusual for a company to evolve through three business models - all of them successful - in the span of just 10 years, but in the fast-paced world of nuclear medicine, it's "change or die." For John Millett, founder of Nuclear Medicine Professionals (NMPI), that meant finding a vehicle with the best combination of reliability, flexibility, and economy, and he got just what he needed with the Freightliner Sprinter. "We use only Sprinter Vans, and I've never even considered another product."