Profile of the bias and variance versus TV factor.

<p>Profile of the bias and variance versus TV factor.</p

Quantitative analysis of the reconstructions by EM, Poisson-TV, and LS-TV for brain phantom.

<p>Quantitative analysis of the reconstructions by EM, Poisson-TV, and LS-TV for brain phantom.</p

Reconstruction of the phantom case.

<p>Reconstruction of the phantom case.</p

Bias, variance, and CRC profiles for the Zubal phantom and brain phantom with different counts.

<p>Bias, variance, and CRC profiles for the Zubal phantom and brain phantom with different counts.</p

Reconstruction of the brain phantom.

<p>Reconstruction of the brain phantom.</p

Profiles of the marked region of the brain phantom.

<p>Profiles of the marked region of the brain phantom.</p

Reconstruction of images for the clinical patient.

<p>Reconstruction of images for the clinical patient.</p

Reconstruction of the EM, LS-TV, and Poisson-TV for the data with different counts.

<p>Reconstruction of the EM, LS-TV, and Poisson-TV for the data with different counts.</p

Scatterplots of glucose metabolism in local maximum of each cluster versus age in the male group (positive correlation).

<p>A quadratic polynomial fitting is used to express the relationship between glucose uptake and age. (a) Right lentiform nucleus, ; (b) Left thalamus, ; (c) Left paracentral lobule, ; (d) Right middle frontal gyrus, ; (e) Right precuneus, .</p

Synthetic Data.

<p>Top: Horizontal profiles along the (<i>left</i>), (<i>middle</i>), and (<i>right</i>) rows of the recovered activity maps for low count measurements. Bottom: Horizontal profiles along the (<i>left</i>), (<i>middle</i>), and (<i>right</i>) rows of the recovered activity maps for high count measurements.</p