Iterative Optimization in Medical Imaging
نویسنده
چکیده
Medical imaging is a broad field and we shall focus here primarily on only two areas: x-ray transmission tomography (CAT-scans); and emission tomography (PET and SPECT scans). We use transmission tomography to illustrate the non-iterative filteredbackprojection (FBP) approach to imaging, and emission tomography, mainly singlephoton emission computed tomography (SPECT), to illustrate iterative methods. The topics we shall consider in this article are as follows: • 1. transmission tomography and non-iterative filtered backprojection; • 2. discretization and iterationART and MART; • 3. emission tomography and iterative likelihood maximization; • 4. the EMML algorithm for emission tomography; • 5. acceleration through block-iterative methods; • 6. iterative entropy maximization; • 7. the split feasibility problem and the CQ algorithm; • 8. intensity-modulated radiation therapy (IMRT).
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