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Area of Science:

  • Radiology
  • Orthopedics
  • Spine Surgery

Background:

  • Cervical alignment is crucial for assessing spinal health.
  • Radiological parameters are used to quantify cervical alignment.
  • Understanding correlations between imaging modalities is important for clinical practice.

Purpose of the Study:

  • To investigate correlations among cervical radiological parameters using X-ray (X-CS) and CT (CT-CS).
  • To compare the consistency of these correlations within and between imaging modalities.

Main Methods:

  • 168 patients (≤60 years) without spinal deformity underwent both X-CS and CT-CS.
  • Measured parameters included occipital slope, various cervical slopes, and sagittal vertical axes (SVA).
  • Calculated angles (O-C2, O-C7, C2-7) and performed correlation analyses.

Main Results:

  • Intrinsic correlation patterns for cervical parameters were highly similar between X-CS and CT-CS.
  • Upper cervical slope parameters significantly influenced SVA parameters (r=|0.13-0.74|).
  • Most parameters showed significant correlation between X-CS and CT-CS (r=0.26-0.44), except O-s and StC7-SVA.

Conclusions:

  • Correlation patterns of cervical parameters are consistent across X-CS and CT-CS.
  • Upper cervical parameters are more predictive of head and neck translation than lower cervical parameters.
  • Horizontal gaze maintenance may improve inter-modality correlation for cervical parameters.