A5047512722- Medical Imaging Techniques and Applications
- Advanced Radiotherapy Techniques
- Advanced X-ray and CT Imaging
- Advanced MRI Techniques and Applications
- Atomic and Subatomic Physics Research
- Cardiovascular Function and Risk Factors
- Radiation Therapy and Dosimetry
- Advanced NMR Techniques and Applications
Technical University of Munich
2023-2024
Ludwig-Maximilians-Universität München
2014-2017
Purpose This work aims at investigating intensity corrected cone‐beam x‐ray computed tomography (CBCT) images for accurate dose calculation in adaptive modulated proton therapy (IMPT) prostate and head neck (H&N) cancer. A deformable image registration (DIR)‐based method a scatter correction approach using the data obtained from DIR as prior are characterized compared on basis of same clinical patient cohort first time. Methods Planning CT (pCT) daily CBCT (reconstructed measured...
The ability to perform dose recalculation on the anatomy of day is important in context adaptive proton therapy.The objective this study was investigate use deformable image registration (DIR) and cone beam CT (CBCT) imaging generate daily stopping power distribution patient.We investigated deformation planning scan (pCT) onto CBCT images a virtual (vCT) using phantom designed for head neck (H & N) region.The imaged at scanner configuration, yielding pCT deformed, treatment reference...
Abstract Purpose To develop a Dixon‐based self‐navigation approach to estimate and correct temporal variations in radial stack‐of‐stars gradient echo imaging for quantitative body MRI. Methods The proposed method estimates using self‐navigator estimated by graph‐cut‐based water‐fat separation algorithm on the oversampled k‐space center. was employed phase differences between spokes (one‐dimensional [1D] correction) perform motion‐resolved reconstruction spatiotemporal pseudo‐periodic...
Purpose: Multi-echo Stack-of-stars (SoS) radial k-space trajectories with golden angle ordering are becoming popular for free-breathing abdominal Dixon imaging and proton density fat fraction (PDFF) mapping. Gradient chain imperfections including eddy currents system delays known to affect the image quality of confound estimation PDFF This work proposes a retrospective trajectory correction method based on simple gradient modulation transfer function (GMTF) measurement predict correct...