Researchers at Penn State College of Medicine and Penn State Milton S. Hershey Medical Center (Hershey, Pa.) have categorized the appearance and evolution of abnormalities on neuroimages that represent abusive head trauma (AHT) in infants. The researchers' descriptions of these abnormalities are important for narrowing down the timing of AHT, which can aid police in identifying and excluding potential perpetrators. Appearances of a variety of abusive traumatic injuries on cranial CT scans and MRIs at different time points are described and discussed in "Serial neuroimaging in infants with abusive head trauma: timing abusive injuries. Clinical article," by Ray Bradford, M.D., Arabinda K. Choudhary, M.D., M.R.C.P., F.R.C.R, and Mark S. Dias, M.D., published online, ahead of print, in the Journal of Neurosurgery: Pediatrics. This study is the largest one on timing of AHT to date, and its findings confirm and extend those of a previous, smaller study conducted by the senior author, Mark S. Dias, M.D. The researchers hope that this article will serve as an important reference for professionals called upon to provide a time frame for abusive head injuries.