The following is a concise description from Archaeology News from Archaeology Magazine Online of the contents of this article:
The Putnam Museum in Davenport has recently CT scanned its mummy. The coffin says it once held Isis Neferit, a chantress in the Temple of Isis, who lived about 3,000 years ago. The new research says the mummy isn’t Isis but a woman who lived 600 years later.
It's really quite fascinating how technologies such as CT scanning further our knowledge about certain artifacts, namely mummies, and correcting errors and outdated notions. I think this is especially important for museums, which is one fundamental reason they exist.