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1. Electric force and magnetic force are actually the same type of interaction, so called electromagnetic interaction. Which physicist unified those two interactions ?
A. Einstein, with the theory of special relativity
B. Maxwell, with Maxwell equation group
C. Hertz, with the discovery of electromagnetic wave
D. Faraday, with his discovery of electromagnetic induction
2. A patient is receiving 250 cGy/fx to a depth of 5 cm from a single spine field at 100 SSD. What will be the dose received at 5 cm depth if the optical distance indicator (ODI) is misread and the therapist set up the patient at 100 cm SSD when in reality it is 115 cm SSD?
A. 189.cGy
B. 217 cGy
C. 330 cGy
D. 200 cGy
3. Which of the following dosimetric parameters is considered on large total skin electron irradiations (TSE)?
A. 1, Il, and Ill.
B. land Ill only.
C. Il and IV only.
D. IV only.
|. Field flatness at Dmax
ll. Electron beam output at dose calibration point
lll. PDDs measured at a depth of 15cm
IV. TMR measured at a depth of 15cm
4: Which of the following radionuclides are used to treat thyroid cancer?
A.1, Il, and III.
B. l and III only.
C. ll and IV only.
D. IV only.
1.1311
1.1251
Hl. 32P
IV. 103P
5: During the time of uptake and waiting, a patient to take a PET/CT scan should void to clear the activity in the bladder by urinating, and this amount is about what percentage of total activity?
A. 5%
B. 15%
C. 25%
D. 35%
E. 45%
6. Which of the following will not reduce patient dose during a fluoroscopy procedure?
A. Minimise beam-on time
B. Use magnification mode
C. Collimate to region of interest
D. Use last image hold
7. For a gradient in the x direction of 3 mT.m-1 and a receiver bandwidth of 32KHz tuned, to hydrogen nuclei (42.576 MHz.T-1), what is the field of view? [pp. 109]
A. 25cm
B. 3.9cm
C. 39cm
D. 250cm
8. When high energy MV photons collide with nuclei they can undergo (g,n) nuclear interaction, leading to the production of free neutrons. This process also occurs in medical linear accelerators, as some photons may interact with the components in the linac treatment head and elsewhere. This phenomenon occurs:
A. For all MV photon beams of any energy
B. For photon beams below 6 MV energy
C. For photon beams above 10 MV energy
D. Itis the protons that are ejected from the nuclei not neutrons
9. Which of the following statements regarding radiation-induced cell death is TRUE?
A. Most cells undergoing radiation-induced cell death do so following mitotic catastrophe
B. The cells that will undergo mitotic catastrophe can be identified immediately post irradiation by their characteristic morphological features
C. Apoptosis occurs exclusively through a p53-dependent pathway
D. Cells that undergo necrosis can be identified by blebbing of their cell membrane, shrinking of the cytoplasm and development of specific DNA fragmentation patterns
E. At sublethal doses, most cells undergo permanent growth arrest
10. What is the most common type of cancer identified in children who were in the vicinity of the Chernobyl nuclear power plant when it exploded in 1986?
A. Osteosarcoma
B. Leukemia
C. Thyroid cancer
D. Glioma
E. Mesothelioma