Observation and measurement of applied anatomical features for thoracic intervertebral foramen puncture on computed tomography images

Figure 1 Measurement of spatial position parameters of the rib head/neck and transverse process space. A: Adjustment of the observation angle: The spinous process line (dashed) is located in the middle of the bilateral pedicle lines (dotted), and the inferior border coincides with the anteroposterior border (solid line) of the superior thoracic vertebra; B: Parameter measurement: The vertical distance from the horizontal line of the inferior margin of the superior transverse process to the horizontal line of the superior margin of the inferior transverse process (dotted) is the width of the transverse process space; the vertical distance from the horizontal line of the highest point of the rib neck/head (dashed) to the horizontal line of the superior margin of the inferior transverse process (dotted) is the height of the rib neck/head protrusion. D_P: The width of the intertransverse process space; D_R: The height of the rib neck/head protrusion.