Cureus 2026 (Mar 25); 18 (3): e105827

Table 5. Case 2: Comparison of lateral cervical neutral radiographs.

X-ray 1 was acquired on 02.05.2024.
X-ray 2 was acquired on 04.04.2024.
The absolute rotation angle (ARA) is a radiographic measurement used to quantify the overall curvature of a spinal region on lateral radiographs. It is calculated by measuring the angle formed between posterior tangent lines drawn along the vertebral bodies at the superior and inferior limits of the spinal segment being evaluated, providing an estimate of the total sagittal curvature of that region.

RRA Segment Normal
Values X-ray 1
Values Versus Normal
(X-ray1) X-ray 2
Values Versus Normal
(X-ray 2) % Change
X-ray 1→2

ARA C2-C7 -42.0º 2.1º 105.00% -20.4º 51.40% 1071.40%

Translation
C2-C7 0.0 mm 19.7 mm 19.7 mm 15.5 mm 15.5 mm 21.30%

RRA Segment	Normal Values	X-ray 1 Values	Versus Normal (X-ray1)	X-ray 2 Values	Versus Normal (X-ray 2)	% Change X-ray 1→2
ARA C2-C7	-42.0º	2.1º	105.00%	-20.4º	51.40%	1071.40%
Translation C2-C7	0.0 mm	19.7 mm	19.7 mm	15.5 mm	15.5 mm	21.30%