The standardized uptake value (SUV) is a nuclear medicine term, used in positron emission tomography (PET) as well as in modern calibrated Single Photon Emission Tomography (SPECT) imaging for a (semi)quantitative analysis.[1] Its use is particularly common in the analysis of [18F]fluorodeoxyglucose ([18F]FDG) images of cancer patients.
As you know tums tablets are mainly made of calcium carbonate. To get calcium carbonate, mining or quarrying is required but pure calcium carbonate can be made from a pure quarried source such as marble, etc.
In addition to the standard Regular Strength antacid, Tums also offers Extra Strength, which has 750 milligrams of calcium carbonate, and Ultra, with 1,000 milligrams. The inactive ingredients in Tums differ depending on the selected flavor of antacid, according to DailyMed.gov.