Atlas of normal radiographic anatomy and anatomic variants in the dog and cat [electronic resource] / Donald E. Thrall, DVM, PhD, DACVR (Radiology, Radiation Oncology), Emeritus Professor, Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, Quality Control, Radiologist, VDIC - IDEXX Telemedicine Consultants, IDEXX Laboratories, Inc., Clackamas, Oregon, Ian D. Robertson, BVSC, DACVR, Emeritus Clinical Professor, Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, Radiologist, Dragonfly Imaging PLLC, Cary, North Carolina.