Perfusion measurements by micro-CT using prior image constrained compressed sensing (PICCS): initial phantom results
نویسندگان
چکیده
منابع مشابه
Prior image constrained compressed sensing (PICCS): a method to accurately reconstruct dynamic CT images from highly undersampled projection data sets.
When the number of projections does not satisfy the Shannon/Nyquist sampling requirement, streaking artifacts are inevitable in x-ray computed tomography (CT) images reconstructed using filtered backprojection algorithms. In this letter, the spatial-temporal correlations in dynamic CT imaging have been exploited to sparsify dynamic CT image sequences and the newly proposed compressed sensing (C...
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C-arm cone-beam CT could replace preoperative multi-detector CT scans in the cardiac interventional setting. However, cardiac gating results in view angle undersampling and the small size of the detector results in projection data truncation. These problems are incompatible with conventional tomographic reconstruction algorithms. In this paper, the prior image constrained compressed sensing (PI...
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4D-CT is an important tool for treatment simulation and treatment planning in radiotherapy. In order to capture the tumor and tissue movement over time, 4D-CT has to acquire more projection images compared to 3D-CT. This leads to more radiation dose, which is the main concern of the application. Using fewer projections can reduce the radiation dose. However, lack of projections degrades the rec...
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ژورنال
عنوان ژورنال: Physics in Medicine and Biology
سال: 2010
ISSN: 0031-9155,1361-6560
DOI: 10.1088/0031-9155/55/8/014