**8. Radiological examinations**

The golden standard radiological measure of the PPCs is the CT. It can visualize the size of the cyst, its shape as well as any possible association with the adjacent tissues. Also, bearing in mind that PPCs are a progressive disease, CT can facilitate the follow-up.

Regarding the US, it is a side-bed, inexpensive, and noninvasive radiological modality. Also, with its ability to measure blood flow, it is suitable to differentiate pseudoaneurysms or ruptures inside the PPC. Finally, US can serve as an imaging guide for further diagnostic and interventional methods. Despite these advantages, the most crucial problem is the visibility and the exposure of the pancreas and the peri-pancreatic region due to the bowel gas and the patient's weight. In addition, it is operator-dependent with a sensitivity in pancreatic fluid collections of approximately 75–93% [17].

Last but not least, magnetic resonance imaging (MRI) can also provide similar data for the PPCs. Its main advantage is the capacity for easier differentiation of the solid debris [18]. MRI also proved to be superior to CT in the prediction of a potential drainable peri-pancreatic fluid collection [19]. However, MRI is far more expensive than CT and its availability is limited at several institutions.
