Which projection of the lumbar spine demonstrates the "Scottie dog" configuration of the zygapophyseal joint?

The projection of the lumbar spine that demonstrates the "Scottie dog" configuration of the zygapophyseal joint is the oblique view. This specific projection allows for the visualization of the lumbar vertebrae in a way that highlights the anatomy of the zygapophyseal joints, particularly the articulation between the inferior and superior articular processes.

When the lumbar spine is positioned in an oblique manner, the orientation of the zygapophyseal joints is altered such that they can be seen in profile. The "Scottie dog" appearance refers to the visual interpretation of the lumbar vertebrae where the various bony processes resemble the outline of a dog. The ear of the dog corresponds to the superior articular process, while the body represents the vertebral body, and the legs are illustrated by the inferior articular processes.

In contrast, the other projections do not effectively demonstrate this unique configuration. The AP (anterior-posterior) view provides a frontal perspective that does not reveal the spatial relationships of the zygapophyseal joints, while the lateral view offers a side profile that highlights vertebral alignment but obscures the joint anatomy. The sitting position does not correspond to a standard radiographic projection for evaluating the lumbar spine