Where should the central ray be positioned for a lateral coccyx x-ray?

For a lateral coccyx x-ray, positioning the central ray just below the sacrococcygeal joint is crucial for obtaining optimal imaging of the coccyx. This positioning allows for the best visualization of the coccyx itself while minimizing superimposition from surrounding structures.

The coccyx is located at the distal end of the vertebral column, and by placing the central ray just below the sacrococcygeal joint, you ensure that the x-ray beam accurately targets the area of interest without unnecessary exposure or distortion from adjacent anatomical features. Proper alignment here provides a clearer and more defined image of the coccyx, facilitating accurate diagnosis and assessment.