| Question 1: What is the adaptive radiation therapy? |
| Reference: | XA Li, ed. Adaptive Radiation Therapy. Phys. Taylor & Francis, 2011. |
| Choice A: | Creating a boost plan |
| Choice B: | Modify patient contours mid-treatment |
| Choice C: | Modifying radiation plans during treatment to account for patient anatomy changes |
| Choice D: | Adapting imaging procedures to improve anatomical visualization |
| Choice E: | All of the above |
| Question 2: What are the major differences between low- and high-field MRI? |
| Reference: | Scarabino, et al. 3.0T MRI Diagnostic Features: Comparison with Lower Magnetic Fields. High Field Brain MRI: Use in Clinical Practice. Springer, Feb 27, 2017. |
| Choice A: | Shorter T1 relaxation time for high-field MRI |
| Choice B: | Lower signal to noise ratio as field strength increases |
| Choice C: | Flow/motion artifacts are often more apparent on images from lower field scanners |
| Choice D: | Similar spatial and temporal resolution in low and high fields |
| Choice E: | Improved functional images with high-field MRI |
| Question 3: Relative to no magnetic field, the relative dosimetric advantages of inline MRI-Linac systems when treating lung tumors are maximized when: |
| Reference: | Oborn, Bradley M., et al. "Dose enhancement in radiotherapy of small lung tumors using inline magnetic fields: a Monte Carlo based planning study." Medical physics 43.1 (2016): 368-377. |
| Choice A: | The magnetic field is low and the tissue density is low |
| Choice B: | The magnetic field is low and the tissue density is high |
| Choice C: | The magnetic field is high and the tissue density is low |
| Choice D: | The magnetic field is high and the tissue density is high |
| Question 4: When comparing open bore magnets, to closed bore magnets: |
| Reference: | Keall, Paul J., Michael Barton, and Stuart Crozier. "The Australian magnetic resonance imaging–linac program." Seminars in radiation oncology. Vol. 24. No. 3. WB Saunders, 2014. |
| Choice A: | The RF coils are easier to design and the gradient coils are easier to design |
| Choice B: | The RF coils are easier to design and the gradient coils are harder to design |
| Choice C: | The RF coils are harder to design and the gradient coils are easier to design |
| Choice D: | The RF coils are harder to design and the gradient coils are harder to design |
| Question 5: How does the radiation beam remain parallel to the Bo when the linac irradiates the patient at different angles (Alberta linac-MR system)? |
| Reference: | B. G. Fallone, The Rotating Biplanar-Magnetic Resonance Imaging System, Seminars in Radiation Oncology, 24(3), pp.200-202 (2014) |
| Choice A: | The patient rotates and the linac is stationary |
| Choice B: | The beam irradiates through the poles of the MRI |
| Choice C: | The beam irradiates through the bore of a cylindrical magnet |
| Choice D: | The beam irradiates through a center opening of a bi-planar open magnet and the linac and magnet rotate together around the stationary patient. |
| Question 6: Why can you place any peripheral tumor at the isocenter in the Alberta linac-MR? |
| Reference: | B. G. Fallone, The Rotating Biplanar-Magnetic Resonance Imaging System, Seminars in Radiation Oncology, 24(3), pp.200-202 (2014) |
| Choice A: | Uses only oblique angles |
| Choice B: | Open MRI in parallel configuration ( rectangular 110 cm by 60 cm patient opening) with specific rotational technique to bring the target at isocenter for optimum irradiation |
| Choice C: | Occurs only in one plane with the left-to-right 110 cm opening |
| Choice D: | A very large ( 110 cm diameter) MRI bore at a significant cost |
