How is the Cobb angle measured and what does it assess?

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Multiple Choice

How is the Cobb angle measured and what does it assess?

The Cobb angle measures scoliosis by quantifying the curvature in the coronal plane on a standing full-spine X-ray. To do it, identify the vertebrae at the top and bottom of the curve that are most tilted (the end vertebrae). Draw a line along the superior endplate of the top vertebra and another along the inferior endplate of the bottom vertebra. The angle formed between these lines (or between lines perpendicular to them) is the Cobb angle. This value expresses how severe the scoliosis is and is used to monitor progression over time and guide treatment decisions. This approach specifically assesses lateral curvature, not sagittal curves like lordosis, and it doesn’t involve measuring distances between lines or using MRI for the measurement.

The Cobb angle measures scoliosis by quantifying the curvature in the coronal plane on a standing full-spine X-ray. To do it, identify the vertebrae at the top and bottom of the curve that are most tilted (the end vertebrae). Draw a line along the superior endplate of the top vertebra and another along the inferior endplate of the bottom vertebra. The angle formed between these lines (or between lines perpendicular to them) is the Cobb angle. This value expresses how severe the scoliosis is and is used to monitor progression over time and guide treatment decisions.

This approach specifically assesses lateral curvature, not sagittal curves like lordosis, and it doesn’t involve measuring distances between lines or using MRI for the measurement.

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