How to measure Cobb angle on Xray Films using your iPhone

Step 1: Identify and mark the end vertebrae

Step 2: Open Measure App on Iphone. https://apps.apple.com/us/app/measure/id1383426740

Step 3: There are two options on the bottom screen. “Measure” and “Level”. Choose “Level”. This brings up the inclinometer.

Step 4: Place the iPhone’s edge along the line drawn on the lower end vertebra.

Step 5: Touch the iPhone’s screen somewhere in the middle. The degrees recalibrate to Zero.

Step 6: Now move the iPhone’s edge to the line drawn for the upper-end vertebra.

Step 7: The reading on the iPhone will give you the Cobb angle.

Author: Kshitij Chaudhary

Kshitij Chaudhary is a fellowship-trained spine surgeon working in Mumbai, India. He has been trained in USA at Harvard University's Beth Israel Medical Center, Boston and Twin Cities Spine Center, Minneapolis. Special Interests: Degenerative spine disorders Scoliosis and spinal deformity surgery Minimally invasive spine surgery Spinal trauma, tumor and infections Craniovertebral surgery

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