What is a cobb angle of 12 degrees regarding scoliosis?

ESpine.com: Scoliosis patients referred for evaluation of spinal deformities should obtain standing AP and lateral radiographs including the entire spine (36″x14″ film). If treatment is contemplated, bending films in the direction of each curve convexity will help to determine curve flexibility. Curves are measured according to the Cobb Method. The vertebrae, which are maximally tilted into the concavity.

End vertebrae: A Cobb angle is measured by taking a line parallel to the end vertebrae of a scoliosis curve and a second line parallel to the vertebrae on the other end, and then measuring the angle between those two line. If the spine is perfectly straight, the cob angle would be zero. A Cobb angle of 12 degrees represents a very mild curve.