15. Appendices
vatech A9 (Model name: PHT-30CSS) User Manual 191
English
15.5.2 Forward head posture vs Normal posture: X-ray path
When the patient is in a normal posture, the "distance of the cervical region through
which the X-ray passes" is short (orange arrow), so attenuation is small, but when the
patient is in the Forward head posture, the "distance of the cervical region through
which the X-ray passes" is relatively long Because of this (red arrow), the attenuation
is large. Therefore, it may occur as artifacts in the image depending on the degree of
attenuation.
Forward head posture Normal C-shaped neck posture
X-ray
path
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