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.
Tums assorted fruit antacid tablets contain the active ingredient calcium carbonate, which is a type of medicine called an antacid. Antacids are used to reduce the acidity of the stomach's juices. Stomach acid is produced in the stomach as a normal part of the digestive process.