Two MSE plots or parameter selections of the neighbor window (A) and the controlling parameters (B) of KIBF algorithm.

<p>Two MSE plots or parameter selections of the neighbor window (A) and the controlling parameters (B) of KIBF algorithm.</p

The NSD versus Bias tradeoff curves of the influx rate estimated by the GF, BF and KIBF algorithms for different ROIs in the brain phantom.

<p>The NSD versus Bias tradeoff curves of the influx rate estimated by the GF, BF and KIBF algorithms for different ROIs in the brain phantom.</p

PSNRs at each frame of the activity images reconstructed by different algorithms.

<p>PSNRs at each frame of the activity images reconstructed by different algorithms.</p

The ¹⁸F-FDG PET simulation settings.

<p>(A) A brain phantom composed of gray matter, white matter and a small tumor; (B) the blood input function and regional time activity curves.</p

MSE plots for parameter selections of the standard deviation for GF algorithm (A) and the controlling parameters of BF algorithm (B).

<p>MSE plots for parameter selections of the standard deviation for GF algorithm (A) and the controlling parameters of BF algorithm (B).</p

The parametric images estimated by different algorithms.

<p>(A) is the result from the direct OSEM reconstruction; (B) is the result from the OSEM image filtered by the GF algorithm ( voxel); (C) is the result from the OSEM image filtered by the BF algorithm ( voxel, ); and (D) the result is from the OSEM image filtered by the KIBF algorithm ( voxel, ). All images are with a same display window.</p

The ground truth and the activity images reconstructed by different algorithms at frames #6, #16, and #26.

<p>(A) are the ground truth; (B) are the results from the direct FBP reconstruction; (C) are the results from the FBP images filtered by the GF algorithm ( voxel); (D) are the results from the FBP images filtered by the BF algorithm ( voxel, ); and (E) are the results from the FBP images filtered by the present KIBF algorithm ( voxel, ). All images are with a same display window.</p

Box plots of the mean value of with standard deviations in the gray matter, white matter and small tumor regions from different algorithms.

<p>Box plots of the mean value of with standard deviations in the gray matter, white matter and small tumor regions from different algorithms.</p

Kinetic parameters used in the ¹⁸F-FDG PET simulation.

<p>Kinetic parameters used in the ¹⁸F-FDG PET simulation.</p

The TSNRs of the activity images reconstructed by different algorithms.

<p>The TSNRs of the activity images reconstructed by different algorithms.</p