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.
On to your questions. The common assumption is that Spam is made of stuff even pigs don't like to admit they've got. Not so, says a spokeswoman for Hormel Foods, which manufactures Spam. It contains a mixture of ham and chopped pork shoulder. (Ham is the pig's thigh; pork is everything else.) Ham is Hormel's top-of-the-line product, and Spam was created in 1937 partly to use up what was left of the pig after the ham had been removed. But only the wholesome parts.