Question 1: A parametric study of lung cancer patients indicated that the optimal coefficient of friction between the lungs and chest wall is:
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Reference: | Al-Mayah A1, Moseley J, Velec M, Brock KK. ‘Sliding characteristic and material compressibility of human lung: parametric study and verification.’ Med Phys. 2009 Oct;36(10):4625-33. |
Choice A: | 0 |
Choice B: | 0.1 |
Choice C: | 0.2 |
Choice D: | 1.0 |
Question 2: Validation of a biomechanical model-based registration on low-contrast images via a 3D deformable dosimeter demonstrated a gamma index (3%/3mm) of:
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Reference: | Velec M, Juang T, Moseley JL, Oldham M, Brock KK. ‘Utility and validation of biomechanical deformable image registration in low-contrast images.’ Pract Radiat Oncol. 2015 Jul-Aug;5(4):e401-8
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Choice A: | 50% |
Choice B: | 65% |
Choice C: | 75% |
Choice D: | 91% |
Question 3: Anatomical changes, including tumor regression or progression and change in atelectasis or pleural effusion, occur in only a minority of lung cancer patients. |
Reference: | M. Kwint, S. Conijn, E. Schaake, J. Knegjens, M. Rossi, P. Remeijer, J.-J. Sonke, and J. Belderbos, “Intra Thoracic Anatomical Changes in Lung Cancer Patients during the Course of Radiotherapy.” Radiother. Oncol. 113, 392–7 (2014).
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Choice A: | True. |
Choice B: | False. |
Question 4: Brachytherapy applicators would be expected to make registration of an image pair most challenging when: |
Reference: | F.F. Berendsen, A.N.T.J. Kotte, A.A.C. de Leeuw, I.M. Jürgenliemk-Schulz, M.A. Viergever, and J.P.W. Pluim, “Registration of Structurally Dissimilar Images in MRI-Based Brachytherapy.” Phys. Med. Biol. 59, 4033–4045 (2014).
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Choice A: | The applicator is present in both images and the imaging modality is the same between both images. |
Choice B: | The applicator is present in one image but not the other, and the modality is the same between both images |
Choice C: | The applicator is present in one image but not the other, and the modality is different between the images. |
Choice D: | The applicator is absent in both images and the modality is different between the images. |
Question 5: Registration accuracy between thoracic image pairs can be improved by: |
Reference: | K. Cao, K. Ding, J.M. Reinhardt, and G.E. Christensen, “Improving Intensity-Based Lung CT Registration Accuracy Utilizing Vascular Information” Int. J. Biomed. Imaging 2012, 285136 (2012).
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Choice A: | Including segmented pulmonary vessels and/or airways. |
Choice B: | Including segmented individual lobes. |
Choice C: | Improving the uniqueness of feature correspondence through strategies such as attribute matching. |
Choice D: | All of the above. |
Question 6: A diffeomorphic transformation is most often parameterized by a(n) _______________. |
Reference: | Beg, Miller, Trouve, Younes. Computing Large Deformation Metric Mappings via Geodesic Flows of Diffeomorphisms. International Journal of Computer Vision, 61(2) 2005. |
Choice A: | Affine transformation. |
Choice B: | Displacement field. |
Choice C: | Velocity field. |
Choice D: | Identity transformation. |