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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: Factors associated with non-fusion after direct pars repair of lumbar spondylolysis with pedicle screw and lamina hook: a clinical and CT-assessed study

Fig. 1

The width of the defect (segment a) is measured on reconstructed sagittal CT image in the middle of the pars interarticularis (A). The distance of the defect to the vertebral body is calculated on axial CT image by the following formula: distance = (c + c’)/2b (B). Angle of the defect (angle d) is the angle between the line of the posterior margin of the vertebral body and the line of the defect on the axial CT image (C)

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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