Visible atrophic changes after moderate TBI Visible atrophic changes after moderate TBI.A and B, Left frontal lobe contusion with local atrophy. Visible atrophic changes after moderate TBI.A and B, Left frontal lobe contusion with local atrophy. The first (A) and second (B) MR images were obtained 390 days apart.C and D, Left parietal lesion and increased sulcal prominence. The first (C) and second (D) MR images were 118 days apart. John D. MacKenzie et al. AJNR Am J Neuroradiol 2002;23:1509-1515 ©2002 by American Society of Neuroradiology