Examples include assessing radiographs (x-ray images) of the human vertebral spine. Patrick Foye, M.D., professor of physical medicine and rehabilitation at Rutgers University, New Jersey Medical School, has published that pareidolia is used to teach medical trainees to assess for spinal fractures and spinal malignancies (cancers). When viewing spinal radiographs, normal bony anatomic structures resemble the face of an owl. (The spinal pedicles resemble an owl's eyes and the spinous process resembles an owl's beak.) But when cancer erodes the bony spinal pedicle, the radiographic appearance changes such that now that eye of the owl seems missing or closed, which is called the "winking owl sign". Meanwhile, when viewing human spinal radiographs taken at a partially sideways angle (oblique view), there are parts of the bony that resemble the silhouette outline of a "Scotty dog". When there is a fracture of part of the spine called the pars interarticularis, it creates the appearance that the dog is now wearing a collar on its neck (the fracture line looks like a dog collar on the Scotty dog). This can help doctors to diagnosis this type of fracture.