"anterior vertebral line: anterior margin of the vertebral bodies"
"posterior vertebral line: posterior margin of the vertebral bodies (also known as George's line)"
"spinolaminar line: posterior margin of the spinal canal"
"posterior spinous line: tips of the spinous processes"
"posterior vertebral line: posterior margin of the vertebral bodies (also known as George's line)"
"These lines should follow a slightly lordotic curve, smooth and without step-offs. Any malalignment should be considered evidence of bony or ligamentous injury."