Investigate Role of Metabolic Imaging in Predicting Tumor Response/Outcome After Pancreatic CA Tx

Inclusion Criteria:- Adult patients (\>18) with histologically confirmed adenocarcinomas of the pancreas with a - treatment plan consisting of definitive or palliative radiation therapy and/or chemotherapy with or without surgery. * Negative urine pregnancy test if a woman of child-bearing potential (WOCBP). * WOCBP must be using an adequate method of contraception to avoid pregnancy throughout the study period. * All patients will be evaluated in a uniform manner at the Stanford GI Combined Modality Tumor Board to determine eligibility. Exclusion Criteria:1. Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. 2\. Any concurrent malignancy other than non-melanomaskin cancer, or carcinomainsitu of the cervix. Patients with a previous malignancy without evidence of disease for \>5 years will be allowed to enter the trial. 3\. WOCBP who is pregnant or breastfeeding. 4. Inability to sign written consent.