Breathing Synchronized PET/CT Scans for the Detection of Malignant Lung & Liver Lesions and Assessment of Tumor Glycolysis

First, fiducial markers will be placed and taped on the patient's lower chest/upper abdomen. This will allow for monitoring of chest motion during breathing. A BH-CT scan will then be acquired with clinical CT scan parameters used in nuclear medicine. A BH-PET scan (acquisition time: 6 min per bed position) will follow the BH-CT scan. BH-PET images will cover the whole thorax, which, on average, corresponds to 1-3 PET FOV's (\~15 cm/FOV). Data for these 1-3 bed positions are acquired to cover the entire thorax. There will be no additional radiotracer injection for the BH-PET scan.