What imaging study is recommended to confirm the diagnosis of orbital cellulitis?

A CT scan is the recommended imaging study to confirm the diagnosis of orbital cellulitis. This condition typically arises as a complication of sinusitis or from other sources of infection in the periorbital area. A CT scan provides detailed cross-sectional images of the orbits and surrounding tissues, allowing for the identification of inflammation, abscess formation, and any potential involvement of the sinuses.

The CT scan can also help differentiate orbital cellulitis from other conditions, such as preseptal cellulitis, by visualizing the extent of the infection and any associated complications, which is critical for initiating appropriate management. It offers superior detail compared to other imaging modalities in this context, making it the preferred choice for evaluation.

While other imaging studies such as X-ray, ultrasound, or MRI can be used in specific circumstances, they do not provide the same level of anatomical detail or clarity regarding the infectious process in the orbit. Hence, the CT scan stands out as the most effective tool in confirming orbital cellulitis.