Artificial Intelligence for Automatic Measurement of Sagittal Vertical Axis Using ResUNet Framework.
Chi-Hung WengChih-Li WangYu-Jui HuangYu-Cheng YehChen-Ju FuChao-Yuan YehTsung-Ting TsaiPublished in: Journal of clinical medicine (2019)
We present an automated method for measuring the sagittal vertical axis (SVA) from lateral radiography of whole spine using a convolutional neural network for keypoint detection (ResUNet) with our improved localization method. The algorithm is robust to various clinical conditions, such as degenerative changes or deformities. The ResUNet was trained and evaluated on 990 standing lateral radiographs taken at Chang Gung Memorial Hospital, Linkou and performs SVA measurement with median absolute error of 1.183 ± 0.166 mm. The 5-mm detection rate of the C7 body and the sacrum are 91% and 87%, respectively. The SVA calculation takes approximately 0.2 s per image. The intra-class correlation coefficient of the SVA estimates between the algorithm and physicians of different years of experience ranges from 0.946 to 0.993, indicating an excellent consistency. The superior performance of the proposed method and its high consistency with physicians proved its usefulness for automatic measurement of SVA in clinical settings.
Keyphrases
- deep learning
- artificial intelligence
- convolutional neural network
- machine learning
- big data
- primary care
- minimally invasive
- loop mediated isothermal amplification
- healthcare
- real time pcr
- magnetic resonance imaging
- emergency department
- high intensity
- diffusion weighted imaging
- neural network
- resistance training
- adverse drug
- image quality
- acute care
- sensitive detection