This undated photo provided by Dr Michael I. Miyamoto shows the mummified remains of Djeher, who lived in the Ptolemaic Era (304-30 BCE), entering a CT scanner tube set up outside of the Egyptian National Museum of Antiquities in Cairo. A team of researchers using CT scans, a type of X-ray, have found signs of heart disease in 3,500-year-old mummies. The subjects were from 1981 B.C. to 334 A.D.