Question

13. Which of the following is not part of an oscilloscope: a flood gun b. accelerator grid c. control grid d. deflection plate 7. The flat field collimator is used for the thyroid uptake test because of its a. isoresponse b. spatial resolution C. focus d. depth of resolution 8. The percent of all measurements falling within two standard deviations of the mean is: a. 34 b. 68 c. 95 d. 99 14. The time period during which a gas detector is insensitive to incoming radiation because it is processing a previous event is called: a. analyzing time b. dead time c. nonparalyzable time d. resolution 9. A solution of Sm Tc has a concentration of 150 mCi/ml. What is its concentration, in mCi/ml, 24 hours later: a. 9.4 b. 18.8 c. 37.5 d. 62.8 15. Radionuclides used in PET imaging are usually made by: a. bombarding stable nuclei with neutrons in a fission reactor b. extraction the radionuclides from nuclear fuel rods c. bombarding stable nuclei with protons in a cyclotron d. isolating the radionuclide from naturally occurring radioactive ores 16. 1311 and 122xe is an example of a. isotopes b. isotones c. isomers d. isobars 10. A sulfur colloid study shows increased uptake in the spleen and bone marrow. Which type of liver cell is most likely associated with this colloidal shift: a. Kupffer b. parenchymal c. polygonal d. pseudohepatic 17. You are taking a series of counts with at least 10,000 counts being obtained during each measurement. What is your percent error for two standard deviations: a. 2% b. 5% C. 8% d. 10% 11. At what times post dose can blood samples be drawn for plasma calculations during a Schilling's test: a. every hour for 6 hours b. 2, 4, 6 and 8 hours c. 6 and 24 hours d. 48 and 72 hours 18. Which of the following statements regarding an alpha particle is TRUE! a. It is composed of one neutron and one proton. b. It gains energy during each ionizing event. C. It has the highest specific ionization of the naturally occurring radiations d. It is the most penetrating of all types of radiations. 12. The introduction of excessive aluminum salts into a sulfur colloid kit makes the radiopharmaceutical unusable because the aluminum salts: a. are acidic and the resulting pH is too low for injection b. react with the acid in the kit and the colloid never has a chance to form. C. cause anaphylactic reactions in patients. d. cause the colloid to precipitate out of solution. 19. Determine the energy of a 5890 à photon: a. 5890 ergs b. 5890 Mev C. 2.11 ev d. 2.11 Mev

Answer 1

7) The correct option is b) spatial resolution. The Flat Field collimator is used for single scintillation detectors such as the uptake probe and has uniform sensitivity across the face of the collimator.

8. The correct option is c) 95% is the percent of data that falls within 2 standard deviations above and below the mean.

10) The correct option is a) Kupffer cells are involved in colloidal shift in liver.

11) The correct option is c) every 6 and 24hourly blood sample will be drawn .