Question

20. A rad is defined as: a the ratio of the dose of x or gamma radiation to the dose of alpha particles needed to produce a specific biologic effect. b. 100 ergs of energy being absorbed per gram of absorbing material. c. REM X RBE d. one electrostatic unit of charge per milliliter of dry air at STP 27. The total counts injected into a patient undergoing a plasma volume were 5.2 x 10 cpm. A 5 ml plasma sample counted in the well gave 25,000 cpm. What would be the patient's calculated plasma volume in milliliters: a. 1040 b. 1750 C. 1890 d. 2311 21. When 11'in oxine is used to label white blood cells, all pipetting and centrifugation must be done gently in order to: a. preserve cell viability b. facilitate the entrance of indium into the cell C. allow for complete settling of the blood cells d. precipitate the white blood cells only out of the plasma 28. The bombardment of stable nuclei with low energy neutrons describes the process of a. fission b. fusion c. neutron activation d. transmutation 22. The most apparent advantage of SPECT imaging is its a. high spatial resolution b. increased sensitivity Cremoval of overlying and underlying structures around the ROI d. rapid, multiple dynamic acquisition 29. What is the energy, in electron volts, of a 2532 à Wave: a. 0.204 b. 4.9 c. 1755 d. 4897 30. 23. The biorouting of thallium is similar to that of: a. potassium b. sodium c. iodine d. sulfur The relative ability of a film emulsion to respond to radiation is known as its: a. speed b. latitude C. sensitivity d. gray scale 31. If a radionuclide gives an exposure rate of 25 mR/hr at 15 cm, what would be the exposure rate in mR/hr at 45 cm: a 1.12 b. 2.78 C. 8.33 d. 75 24. The agent of choice for a GFR determination is somTc labeled: a. pertechnetate b. DTPA c. GHA d. DMSA 25. Which of the following would be LEAST likely to be used for a radionuclide renogram study: a. 9m Tc DTPA b. 99m Tc MAG -3 c. 1231 hippuran d. 1311 hippuran 26. At 48 hours post dose, the presence of 'Ga citrate in the considered to be abnormal. a spleen b. kidney c. liver d. intestine 32. A 90 unit window is needed to detect a 185 kev photon. What would your LLD and ULD settings be: a. 90 and 185 b. 95 and 295 c. 140 and 230 d. 165 and 205

Answer 1

20. The correct option is b) 100ergs of energy being absorbed per gram of absorbing material .

22) The correct option is a) high spatial resolution

23) The correct option is a) potassium

24) The correct option is d) DSMA .DMSA binds to proximal renal tubules, is useful for imaging the renal parenchyma and clears very slowly in the urine. 99mTc GH is cleared by both glomerular filtration rate and the renal tubules, and is also useful for imaging the renal cortex.