Improving the robustness of 3D turbo spin echo imaging to involuntary motion
| Autor: | Jürgen Hennig, Guobin Li, Esther Raithel, Jan G. Korvink, Martin Büchert, Maxim Zaitsev, Dominik Paul |
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| Rok vydání: | 2014 |
| Předmět: |
Patient Motion
Scanner Radiological and Ultrasound Technology business.industry Computer science Movement Biophysics Matrix norm Reproducibility of Results Fast spin echo Image Enhancement Magnetic Resonance Imaging Imaging Three-Dimensional Compressed sensing Motion artifacts Robustness (computer science) Image Interpretation Computer-Assisted Feasibility Studies Humans Radiology Nuclear Medicine and imaging Computer vision Artificial intelligence Artifacts business Patient comfort |
| Zdroj: | Magnetic Resonance Materials in Physics, Biology and Medicine. 28:329-345 |
| ISSN: | 1352-8661 0968-5243 |
| Popis: | 3D TSE imaging is very prone to motion artifacts, especially from uncooperative patients, because of the long scan duration. The need to repeat this time-consuming 3D acquisition in the event of large motion artifacts substantially reduces patient comfort and increases the workload of the scanner. A new sampling strategy enables homogenized collection of k-space data for 3D TSE imaging. It is combined with Frobenius norm-based motion-detection to enable freely stopped acquisition in 3D TSE imaging whenever excessive subject motion is detected. The feasibility and reliability of the proposed method were demonstrated and evaluated in in-vivo experiments. It is shown that the additional overhead related to repeat scanning of the 3D TSE sequence as a result of patient motion can be substantially reduced by using the homogenized k-space sampling strategy with automatic scan completion as determined by Frobenius norm-based motion-detection. |
| Databáze: | OpenAIRE |
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