Related Experiment Video
Updated: Nov 12, 2025
Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
Published on: March 14, 2017
Reliability of 2 Smartphone Applications for Cobb Angle Measurement in Scoliosis
İsmail Emre Ketenci1, Hakan Serhat Yanık1, Özgür Erdoğan1
1Department of Orthopedics and Traumatology, Haydarpasa Numune Education and Research Hospital, Istanbul, Turkey.
Background:
As mobile technology has evolved, smartphone applications have been used for radiographic angle measurements in daily clinical practice. This study aimed to assess the reliability of 2 smartphone applications (iPinPoint and Cobbmeter) in measuring scoliosis Cobb angles compared with picture archiving and communication system (PACS) tools.
Methods:
Anteroposterior whole spinal digital radiographs of 50 patients were retrospectively analyzed. Four observers measured Cobb angles of predetermined major structural curves using the tools in the PACS software and 2 smartphone applications. The inter- and intraobserver reliabilty were measured using intraclass correlation coefficients (ICC).
Results:
Very good interobserver agreement was seen with PACS, iPinPoint, and Cobbmeter measurements (ICC, 0.991, 0.980, and 0.991, respectively). Intraobserver reliability of the 4 observers was also very good for all techniques (ICC > 0.9 for all observers).
Conclusions:
Both smartphone applications were reliable in measuring scoliosis Cobb angles, with reference to PACS tools. They may be useful when digital or manual mesurement tools are not available.
