A5050323258- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Advanced MRI Techniques and Applications
- Lung Cancer Diagnosis and Treatment
- Cardiac Imaging and Diagnostics
University of California, Los Angeles
2019
4D cone beam computed tomography (CBCT) images of the thorax and abdomen can have reduced quality due to limited number projections per respiratory bin used in gated image reconstruction. In this work, we present a new algorithm reconstruct high CBCT by simultaneously reconstructing generating an associated motion model. This is done updating model parameters compensate for during iterative reconstruction process. acquisition was simulated using digital eXternal CArdiac Torso (XCAT) phantom,...
Purpose To develop and evaluate a method of reconstructing patient‐ treatment day‐ specific volumetric image motion model from free‐breathing cone‐beam projections respiratory surrogate measurements. This Motion‐Compensated Simultaneous Algebraic Reconstruction Technique (MC‐SART) generates uses derived directly the projections, without requiring prior measurements 4DCT, can compensate for both inter‐ intrabin deformations. The be used to generate images at arbitrary breathing points, which...
To objectively compare the suitability of MRI pulse sequences and commercially available fiducial markers (FMs) for MRI-only prostate radiotherapy simulation. Most FMs appear as small signal voids in images making them difficult to differentiate from tissue heterogeneities such calcifications. In this study we use quantitative metrics evaluate visibility 27 patients an anthropomorphic phantom with a variety standard clinical FMs.