Bayesian Analysis of a One Compartment Kinetic Model Used in Medical Imaging.
Bayesian Analysis of a One Compartment Kinetic Model Used in Medical Imaging.
复制标题
DOI:
10.1080/02664763.2014.934666
复制
发表时间:
2015
影响因子:
1.5
通讯作者:
Sitek A
中科院分区:
文献类型:
--
作者:
Malave P;Sitek A
Kinetic models are used extensively in science, engineering, and medicine. Mathematically, they are a set of coupled differential equations including a source function, otherwise known as an input function. We investigate whether parametric modeling of a noisy input function offers any benefit over the non-parametric input function in estimating kinetic parameters. Our analysis includes four formulations of Bayesian posteriors of model parameters where noise is taken into account in the likelihood functions. Posteriors are determined numerically with a Markov chain Monte Carlo simulation. We compare point estimates derived from the posteriors to a weighted non–linear least squares estimate. Results imply that parametric modeling of the input function does not improve the accuracy of model parameters, even with perfect knowledge of the functional form. Posteriors are validated using an unconventional utilization of the chi square test. We demonstrate that if the noise in the input function is not taken into account, the resulting posteriors are incorrect.
登录
查看更多内容
影响因子:
3.5
作者:
HUESMAN, RH;MAZOYER, BM
通讯作者:
MAZOYER, BM
影响因子:
2.7
作者:
HASTINGS, WK
通讯作者:
HASTINGS, WK
影响因子:
3.8
作者:
Muzic, RF;Christian, BT
通讯作者:
Christian, BT
影响因子:
3.5
作者:
CHEN, K;HUANG, SC;YU, DC
通讯作者:
YU, DC
影响因子:
9.9
作者:
Mintun, M. A.;LaRossa, G. N.;Morris, J. C.
通讯作者:
Morris, J. C.