A true lateral thoracic spine position can be determined when:
the zygapophyseal joints are visible
the posterior rib margin is superimposed and the intervertebral foramina are open
the intervertebral foramina are open
the posterior rib margin is superimposed
the posterior rib margin is superimposed and the intervertebral foramina are open
Rationale: A true lateral t-spine is determined when the posterior rib margins are superimposed and the intervertebral foramina are open.
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