Ultrasonography of a patient in sepsis. Septic focus is suspected to be localised in the abdominal cavity. A patient underwent right-sided hemicolectomy one week ago. She had to be intubated due to the development of sepsis and MODS. She received mechanical ventilation. A nasogastric tube was inserted. Let´s suppose you just finished echocardiography (the patient was positioned to her left side). A finding below diaphragm attracted your attention during the examination of the left thoracic cavity: