Two competing local companies, both working to produce a scarce radioactive isotope used in heart stress tests and cancer scans, have each brought in money from investors. And at least one is getting wooed by three communities to house the manufacturing plant it plans to build. SHINE Medical Technologies, Middleton, said Tuesday it is getting $11 million from investors led by Knox, a Las Vegas venture capital fund set up by UW-Madison alumnus Frederick Mancheski.
