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Table 1 Root-mean-squares of difference between reference and computed intervertebral angles through 7 settings from -10° to + 20° in Calibration model 1 under optimal 1 and degraded 2 conditions for side bending and for flexion-extension

From: An objective spinal motion imaging assessment (OSMIA): reliability, accuracy and exposure data

 

Side-bending

Flexion-extension

 

Optimal

Degraded

Optimal

Degraded

RMS error (°)

0.32

0.40

0.52

1.03

  1. 1. Optimal condition: X-ray beam centred on universal joint; horizontal and orthogonal to model.
  2. 2. Degraded condition: X-ray beam centred on universal joint, but angled 10° downward and whole model axially rotated by 10°.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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