Inclusion Criteria:
- Men and women, 18 years of age or older
- Willing and able to fast for at least 6 hours before and for the duration of the scan
- Willing and able to lay motionless in a supine position for 60 and 20 minutes at separate timepoints.
- Willing and able to give informed consent
Exclusion Criteria:
- No Primary Care Physician
- Body weight >240 kg
- Allergy to iodine contrast (only for subjects enrolled in Arm 3)
- Creatinine levels > 1.5 mg/dL or estimated glomerular filtration rate (eGFR) < 60 ml/minute (only for subjects enrolled in Arm 3)
- Recent (1 month) contrast enhanced CT
- Any known concomitant acute infection (including upper respiratory infection, genitourinary infections, etc.
- History of metastatic or newly (last 5 years) diagnosed locally invasive cancer.
- Chemotherapy in the last 5 years
- Radiation therapy in the last 3 years
- Major surgery within the last 6 months.
- Pregnancy or breast-feeding
- Diabetes
- Fasting blood glucose level > 160 mg/dL before administration of FDG
- Prisoners
- The standard MRI contraindications apply, including but not limited to:
Having a pacemaker or other implanted electronic device. Metal foreign bodies, aneurysm clips, heart valve prosthesis, vascular stents, cochlear implants, embolization coils, gunshot wounds with retained bullet fragments, penile implant, IUCD.
Claustrophobia