 - Pregnant females are not eligible to participate in this study because there is a chance PETCT scans might be risky for the developing baby. Females physically capable of getting pregnant will be required to get a urine pregnancy test at no cost before each of the PETCT scans. If the pregnancy test is positive, the T1DM patient or healthy control will be excluded from the study. The consent form describes the risks in detail and the need for women of childbearing age to undergo a pregnancy test. 