PET Imaging in Patients at Risk for Acute Lung Injury

"PET-CT imaging with \[18F\]FDG will be performed within 24 hours of admission to the ICU. All patients imaged will be those remaining on mechanical ventilation at the time of PET imaging.~A low-dose CT scan (50 effective mAs) will be obtained with placement of the participant such that the lungs are centered within the field of view. After completing the transmission scan, 10 mCi of \[18F\]FDG will be injected intravenously at the start of a 60-minute dynamic scan acquisition and the intravenous (IV) catheter flushed with 10 ml saline. Imaging will be obtained with the following framing schedule: 24 5-sec, 6 3-minute and 8 5-minute frames."