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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Sagittal intervertebral rotational motion: a deep learning-based measurement on flexion–neutral–extension cervical lateral radiographs

Fig. 2

Landmark annotations and the method for sagittal intervertebral rotational motion (SIRM) measurement. a Annotations of landmarks (taking the neutral view as an example). Each landmark has a specific name. b Sagittal intervertebral motion ranges included flexion–extension (F/E), flexion–neutral (F/N), and neutral–extension (N/E) motion based on flexion, neutral, and extension views (taking C4/5 as an example). c Measurement method for SIRM. For C2/3 (left), the SIRM was the difference in the angles between the plane of C2 and the midplane of C3 on F/E, F/N, and N/E motion. For C3/4-C6/7 (right), the SIRM was the difference in the angles between the midplane of Cn and Cn + 1 (3 ≤ n ≤ 6) on F/E, F/N, and N/E motion

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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