Senior Supervisor: Prof. Dr. Wolfgang Birkfellner
Junior Supervisors: Dr Gernot Kronreif, Univ.-Prof. Dr. DI Dietmar Georg
Department: Center for Medical Physics and Biomedical Engineering
Thesis since: 09/2016
Phone: +43 1 40400 54710
Patient specific source-detector trajectory optimization for Cone Beam Computed Tomography
Nowadays, three dimensional Cone Beam CT (CBCT) has turned into a widespread clinical routine imaging modality for image-guided interventions such as image-guided surgery and radiotherapy. One important feature in interventional radiology is that we have well-known targets provided by high-resolution pre-treatment imaging (e.g. preoperative CT). Therefore, prior knowledge of patient anatomy and target lesion is usually available. Incorporating such prior information into a low-dose CBCT using a minimum number of projections and angles may be sufficient to target the lesion with less radiation. In this case, the source-detector trajectory can be selected in the way to maximize performance of the reconstructed image at a particular region of interest. The main aim of our thesis is to investigate minimal trajectories which include necessary information to provide a reasonable image quality at particular regions of interest. Our optimized trajectories also have the potential to incorporate kinematic constraints (e.g. constraints related to the large patient size or other medical devices) into the image acquisition process and therefore facilitate CBCT under severe kinematic constraints when standard circular trajectory is not feasible.
Hatamikia, S., Biguri, A., Kronreif,G., Kettenbach, J., Russ, T., Furtado, H., Kumar Shiyam, L., Buschmann, M., Unger, E., Figl, M., Georg, D., Birkfellner, W. Optimization for customized trajectories in Cone Beam Computed Tomography. Medical Physics Journal, 2020. doi: 10.1002/mp.14403.
Hatamikia, S., Oberoi, G., Unger, E., Kronreif, G., Kettenbach, J., Buschmann, M., Figl, M., Knäusl, B., Moscato, F., Birkfellner, W. Additively Manufactured Patient-Specific Anthropomorphic Thorax Phantom With Realistic Radiation Attenuation Properties. Frontiers in Bioengineering and Biotechnology journal, 2020.
S. Hatamikia, A. Biguri, G. Kronreif, M. Figl, T. Russ, J. Kettenbach, M. Buschmann, W. Birkfellner. Towards on-the-fly trajectory optimization for C-arm CBCT under strong kinematic constraints. Submitted to PLOS ONE journal, August 2020.
F. Ulrich-Pur, T. Bergauer, A. Burker, S. Hatamikia, A. Hirtl, C. Irmler, S. Kaser, P. Paulitsch, F. Pitters, V. Teufelhart. Imaging with protons at MedAustron. Journal of Nuclear Instruments and Methods in Physics Research. A, 2020, 978 (164407).
S. Hatamikia, A. Biguri, G. Kronreif, T. Russ, J. Kettenbach, W. Birkfellner. Short scan source- detector trajectories for target-based CBCT. Full contributed paper in IEEE Engineering in Medicine and Biology Conference (IEEE EMBC), Montreal, Canada, July 20-24, 2020. DOI: 10.1109/EMBC44109.2020.9176667
S. Hatamikia, A. Biguri, G. Kronreif, J. Kettenbach, W. Birkfellner. CBCT reconstruction based on arbitrary trajectories using TIGRE software tool. Proceeding of the 19th joint conference on new technologies for Computer/Robot Assisted Surgery (CRAS). March 2019, Genova, Italy.
S. Hatamikia , A. Biguri, G. Kronreif, H. Furtado, J. Kettenbach, M. Figl, W. Birkfellner. Source- detector trajectory optimization for C-arm CBCT. Supplement of the International Journal of CARS (IJCARS), June 18 - 21, 2019, Rennes, France.
S Hatamikia , A Biguri, G. Kronreif, J. Kettenbach, W. Birkfellner. Massnahmen zur Reduktion der Strahlendosis bei Cone Beam-Computertomografie. Gemeinsamer Kongress der DRG und ÖRG, April 2020, Vienna, Austria.
S. Hatamikia, A. Biguri, G. Kronreif, J. Kettenbach,W. Birkfellner. Optimized orientations for C-arm CBCT reconstruction. European Congress of Radiology (ECR), 28 Feb-4 Mar 2018, Vienna, Austria.