![Page 1: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/1.jpg)
Motion correction in 3D PET/CT
using optical flow methods
M Dawood, F Büther, N Lang, X Jiang, M Schäfers, O Schober, KP Schäfers
Nuclear Medicine, University Hospital Münster, Germany
![Page 2: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/2.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Problem
Spatial non-correspondance between PET and CT due to motion
![Page 3: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/3.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Optical Flow
A method to estimate deformation between image frames
Independent of the form and type of movement between the frames
Non-rigid and pixel-based
![Page 4: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/4.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Combined Local/Global
Minimize fLG
dxdydzdtVVIIVkf TTLG )(*
2
![Page 5: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/5.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Discontinuity Preserving Non-Quadratic
Non-Quadratic approach allows better approximation than least squares
Discontinuity preservation allows better estimation across organ boundaries
Minimize fD
2
222
21
12
i
ii
ss
dxdydzdtSmoothingDataf D
![Page 6: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/6.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Lukas/Kanade Horn/Schunck Bruhn
Non-Linear Discontinuity Preserving Result
Demonstration
![Page 7: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/7.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Results 1 (Phantom)
![Page 8: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/8.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Results 2 (13N-NH3)
![Page 9: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/9.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
![Page 10: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/10.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Results 2 (13N-NH3)
![Page 11: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/11.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Results 3 (18F-FDG)
![Page 12: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/12.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Results 3 (18F-FDG)
![Page 13: Motion correction in 3D PET/CT using optical flow methods](https://reader035.vdocuments.net/reader035/viewer/2022062421/56812b0c550346895d8ef588/html5/thumbnails/13.jpg)
Motion correction with optical flow algorithms
M. Dawood et al. Motion correction in 3d pet/ct with advanced optical flow algorithms. Submitted to ieee transactions on medical imaging.
Thank you!