Simultaneous source and attenuation reconstruction in SPECT using ballistic and single scattering data
نویسندگان
چکیده
منابع مشابه
Advanced reconstruction of attenuation maps using SPECT emission data only
Today, attenuation corrected SPECT, typically performed using CT or Gadolinium line source based transmission scans, is more and more becoming standard in many medical applications. Moreover, the information about the material density distribution provided by these scans is key for other artifact compensation approaches in advanced SPECT reconstruction. Major drawbacks of these approaches are t...
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We report theory and numerical simulations that demonstrate the feasibility of simultaneous reconstruction of the three-dimensional scattering and absorption coefficients of a mesoscopic system using angularly resolved measurements of scattered light. Image reconstruction is based on the inversion of a generalized (broken ray) Radon transform relating the scattering and absorption coefficients ...
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We consider the simultaneous reconstruction of the absorption coefficient and the source term in a linear transport equation from available boundary measurements. This problem finds applications in SPECT, a medical imaging modality. When the absorption coefficient is known, recently derived inversion formulas for the attenuated Radon transform can be used to reconstruct the source term. Moreove...
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Introduction: The main goal of SPECT imaging is to determine activity distribution inside the organs of the body. However, due to photon attenuation, it is almost impossible to do a quantitative study. In this paper, we suggest a mathematical relationship between activity distribution and its corresponding projections using a transfer matrix. Monte Carlo simulation was used to find a precise tr...
متن کاملAttenuation Correction Using SPECT Emission Data Only
A major step towards quantitative SPECT imaging may be achieved if attenuation, scatter and blurring effects are accounted for in the reconstruction process. Here we consider an approach which simultaneously estimates the unknown attenuation coefficient and the emission source using the emission data only. This leads to an inverse mathematical problem which could no longer be solved via iterati...
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ژورنال
عنوان ژورنال: Inverse Problems
سال: 2015
ISSN: 0266-5611,1361-6420
DOI: 10.1088/0266-5611/31/9/095002