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 at PD Hinduja Hospital, 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: 1. Spinal Deformity and Scoliosis Surgery (Pediatric and Adult) 2. Cranio-vertebral and Cervical Spine Surgery 3. Spinal Tumors, Tuberculosis and Infections 4. Degenerative diseases of Lumbar spine 5. Spinal Trauma and Fractures 6. Minimally Invasive Spine Surgery

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