2016 AAPM Annual Meeting
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Session Title: Session in Memory of Jean Pouliot: Next-Generation Deformable Image Registration
Question 1: A parametric study of lung cancer patients indicated that the optimal coefficient of friction between the lungs and chest wall is:
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:
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
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).
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).
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).
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.
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