Which statement about radiography of the vertebrae is true?

The statement about radiography of the vertebrae that indicates intervertebral disc spaces appear wider toward the center of the film and narrower toward the end of the film is accurate due to the geometric projection of the vertebral anatomy in radiographic imaging.

In radiography, the way structures are portrayed on film depends significantly on the angle from which they are viewed. Intervertebral disc spaces are typically more defined at the midpoint between adjacent vertebrae, which can lead to them appearing wider in the central region of the film. This is due to the alignment and the way the X-rays pass through the structures; discal spaces are also impacted by the natural curvature of the spine and the positioning of the patient during imaging. By contrast, the edges or ends of the film may not depict these spaces as clearly, leading to an optical illusion where they appear narrower.

Understanding this aspect is crucial for interpreting radiographs correctly in clinical practice and for accurately diagnosing conditions related to the vertebral column.