For the lateral sacrum projection, where do you measure?

In the lateral sacrum projection, measuring at the central ray level is essential to accurately position the patient and ensure that the x-ray beam is appropriately targeted to the region of interest. This method represents the most effective way to achieve optimal imaging of the sacrum.

When this measurement is taken at the central ray level, it helps to determine the appropriate distance from the film or detector to the patient. Focusing on the central ray level ensures that the x-ray beam will be perpendicular to the film and specifically aimed at the sacral area, thus improving the quality of the image and the visibility of anatomical structures.

Positioning considerations for the lateral sacrum also involve accounting for anatomical landmarks to align the central ray correctly, which further emphasizes the importance of measuring at this level to achieve the best diagnostic images.