<prompt> Beheaded Scottish terrier sign is seen inSpondylosisSpondylolisthesisFracture transverse process of lumbar veebraFracture rib  <response>: Optimal view for visualizing spondylolysis defect isX-ray spine oblique view: - Scotty dog with broken collar or neck Spondylolysis. - Beheaded Scotty dog Spondylolisthesis. Oblique radiograph of lumbar spine is best view for radiographic diagnosis of spondylosis. Note the description of Scottish dog appearance as seen on oblique LS spine view and classical spondylolysis: 