Answer Happy

¹1C 18F P Cr 58 Fe Ga Se 81 Kr Sr 99m Tc 1331 1Hg 20171 Some Radioactive Isotopes Useful in Medical Imaging Mode of Decay Isotope Carbon-11 Fluorine-18 Phosphorus-32 Chromium-51 Iron-59 Gallium-67 Selenium-75 Krypton-81m Strontium-81 Technetium-99m Iodine-131 Mercury-197 Thallium-201 B+, Y B+, Y B E.C., Y B, Y E.C., Y E.C., y Y B Y B, Y E.C., Y E.C., y Half-life 20.3 m 109 m 14.3 d 27.7 d 44.5 d 78.3 h 118 d 13.3 s 22.2 m 6.01 h 8.04 d 64.1 h 3.05 d Use in Medical Imaging Brain scan to trace glucose metabolism Brain scan to trace glucose metabolism Detect eye tumors Diagnose albinism, image the spleen and gastrointestinal tract Bone marrow function, diagnose anemias Whole-body scan for tumors Pancreas scan Lung ventilation scan Scan for bone diseases, including cancer Brain, liver, kidney, bone scans; diagnosis of damaged heart muscle Diagnosis of thyroid malfunction Kidney scan Heart scan and exercise stress test The radioactive isotope chromium-51 is used in medical imaging as indicated on the table above. If 51.4 milligrams of chromium-51 is administered to a patient, how many milligrams are left in the body after 110.8 days? mg