Capstone Exam Study Guide Anew Update Version 100% Questions & Correct Answers.

Which algorithm is most accurate for calculating photon dose? a. Convolution b. Super Position c. Collapsed Cone d. Monte Carlo - correct answer d. Monte Carlo What is the principal element imaged with MRI? a. Hydrogen b. Phosphorus c. Carbon d. Nitrogen - correct answer a. Hydrogen For registration of CT to MRI, what number of points would give the greatest accuracy? a. 2 b. 3 c. 4 d. none of the above - correct answer c. 4 What is approximate dose at 6cm for a 12 MeV electron? a. 90% b. 80% c. 50% d. 3% - correct answer d. 3% What is the thickness of Pb required to ensure that less than 0.1% dose is transmitted? TVL for Pb is 2 inches. a. 2 inches b. 4 inches c. 6 inches d. 8 inches - correct answer c. 6 inches A lateral beam enters the femoral head. What is the dose upstream of the femoral head as compared to a plan run homogeneous? a. slightly higher b. slightly lower c. the same d. none of the above - correct answer a. slightly higher For a right triangle, leg A is 6 cm, leg B is 9 cm, what is the length of the hypotenuse? a. 11.4 b. 12.1 c. 10.8 d. none of the above - correct answer c. 10.8 Pi radians equals how many degrees? a. 90 b. 180 c. 270 d. 360 - correct answer b. 180 The following binary number equals what in base 10: 1100111 a. 93 b. 98 c. 103 d. 111 - correct answer c. 103 The dose in air at 3cm vs the dose in water at 3cm for Ir-192 is: a. less b. greater c. about the same d. 9 times greater - correct answer c. about the same what regulations governs the medical use of byproduct radioactive material? a. 10CFR Part 20 b. 10CFR Part 35 c. NCRP 147 d. NCRP 151 - correct answer b. 10CFR Part 35 Which equation defines an electron cut out factor? The cone being used is a 20cm cone. a. Rdg Cone Size 20/ Rdg Cone 10 b. Rdg Cut Out/ Rdg Open Cone 10 c. Rdg Cut Out/ Rdg Open Cone 20 d. None of the above - correct answer c. Rdg Cut Out. Rdg Open Cone 20 Which detector would be best to evaluate small field profiles a. Ion chamber b. Parallel plate chamber c. Rem ball d. film - correct answer d. film What is the design goal for members of the general public? a. 0.02 mGy/week b. 0.10 mGy/weel c. 0.02 mGy/month d. 0.10 mGy/month - correct answer a. 0.02 mGy/week Which of the following individuals would require a personal monitoring device (badge)? a. fetal badge: worker did not declare pregnancy b. Patient family member. Patient being treated with linac. c. Hospital greeter at the front of the Cancer Center d. X-ray tech student - correct answer d. X-ray tech student What is the rest mass of a proton? a. 938 MeV b. 938 keV c. 511 MeV d. 511 KeV - correct answer a. 938 MeV What is the threshold energy for pair production? a. 1.022 keV b. 1.022 MeV c. Must be greater than 25keV d. None of the above - correct answer b. 1.022 MeV What is the range of a 6 MeV electron in hard bone? a. 3cm b. 2.5cm c. 1.8cm d. 6cm - correct answer c. 1.8 cm Which of the following is a good shield for neutrons? a. Borated polyethylene b. Boron or Cadmium c. Concrete d. All of the above - correct answer d. All of the Above What is the y-axis for a differential dose volume histogram? a. % Volume b. # of voxels