An ellipse is a set of points, such that for any point of the set, the sum of the distances | |, | | to two fixed points , , the foci, is constant, usually denoted by , > .
Foods to Eat Before a PET Scan. A PET (positron emission tomography) scan is a powerful process for detecting cancer. Cancer cells grow extremely fast and need a lot of glucose. A doctor will inject the patient with glucose, and the PET scanner detects if any cells are emitting signs of high glucose use. If you eat before your PET scan, you risk throwing your glucose levels off balance and getting inaccurate results.
Blood glucose meters are used to test blood sugar levels and will tell you if your level is below 70 mg/dL. If you do not have a blood sugar testing machine on hand and are experiencing signs or symptoms of low blood sugar, those symptoms may be enough to diagnose low blood sugar.