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• W2110140760 abstract "<para xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> The generalized linear least square (GLLS) method can successfully construct unbiased parametric images from dynamic positron emission tomography data. Quantitative dynamic single photon emission computed tomography (SPECT) also has the potential to generate physiological parametric images. However, the high level of noise, intrinsic in SPECT, can give rise to unsuccessful voxelwise fitting using GLLS, resulting in physiologically meaningless estimates. In this paper, we systematically investigated the applicability of our recently proposed approaches to improve the reliability of GLLS to parametric image generation from noisy dynamic SPECT data. The proposed approaches include use of a prior estimate of distribution volume ( <formula formulatype=inline><tex Notation=TeX>$V_{rm d}$</tex></formula>), a bootstrap Monte Carlo (BMC) resampling technique, as well as a combination of both techniques. Full Monte Carlo simulations were performed to generate dynamic projection data, which were then reconstructed with and without resolution recovery, before generating parametric images with the proposed methods. Four experimental clinical datasets were also included in the analysis. The GLLS methods incorporating BMC resampling could successfully and reliably generate parametric images. For high signal-to-noise ratio (SNR) imaging data, the BMC-aided GLLS provided the best estimates of <formula formulatype=inline><tex Notation=TeX>$K_{1}$ </tex></formula>, while the <formula formulatype=inline><tex Notation=TeX>$hbox{BMC-V}_{rm d}hbox{-aided}$</tex></formula> GLLS proved superior for estimating <formula formulatype=inline><tex Notation=TeX>$V_{rm d}$</tex></formula>. The improvement in reliability gained with BMC-aided GLLS in low SNR image data came at the expense of some overestimation of <formula formulatype=inline><tex Notation=TeX>$V_{rm d}$</tex></formula> and increased computation time. </para>" @default.
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• W2110140760 date "2009-04-01" @default.
• W2110140760 modified "2023-09-24" @default.
• W2110140760 title "Constructing Reliable Parametric Images Using Enhanced GLLS for Dynamic SPECT" @default.
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• W2110140760 doi "https://doi.org/10.1109/tbme.2008.2009998" @default.
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