ScienceDaily (May 2, 2008) — A technique called microscopic X-ray computed tomography (microCT) is affording scientists the ability to visualize even the subtlest birth defects in prenatal and postnatal bats, mice, opossums and primates, which one day may lead to new understandings about human birth defects, said Charles Keller, M.D., of The University of Texas Health Science Center at San Antonio.