With reference to the patient, where should the top border of the IR or collimated field be positioned for the AP projection of the thoracic vertebrae?

Refer to Image H, where is the CR directed?

A radiograph of an AP thoracic spine projection reveals that the upper thoracic spine is overexposed. The lower vertebrae have acceptable density and contrast.  Which one of the following modifications will improve the visibility of the upper thoracic spine?   Change 

Which of the following positions will demonstrate the lumbosacral (L5-S1) zygapophyseal articulations?

The AP-axial-vertebral arch projection may be performed to better demonstrate the:

Why are the anterior positions (LAO/RAO) preferred over the posterior positions (LPO/RPO) of the cervical spine?

 Which structure in Image A is labelled #6:

What compensation should be made in the lateral projection of the thoracic vertebral column on a recumbent patient when the lower thoracic region is not parallel with the table?

Which two vertebral curvatures are lordotic (posteriorly concave) curves?

 Image A represents which of the following projections?