Model-based blind estimation of kinetic parameters in dynamic contrast enhanced (DCE)-MRI.
Model-based blind estimation of kinetic parameters in dynamic contrast enhanced (DCE)-MRI.
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DOI:
10.1002/mrm.22101
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发表时间:
2009-12
影响因子:
3.3
通讯作者:
DiBella, Edward V. R.
中科院分区:
文献类型:
--
作者:
Fluckiger, Jacob U.;Schabel, Matthias C.;DiBella, Edward V. R.
关键词:
A method to simultaneously estimate the arterial input function (AIF) and pharmacokinetic model parameters from dynamic contrast-enhanced MRI data was developed. This algorithm uses a parameterized functional form to model the AIF and k-means clustering to classify tissue time-concentration measurements into a set of characteristic curves. An iterative blind estimation algorithm alternately estimated parameters for the input function and the pharmacokinetic model. Computer simulations were used to investigate the algorithm's sensitivity to noise and initial estimates. In 12 patients with sarcomas, pharmacokinetic parameter estimates were compared with “truth” obtained from model regression using a measured AIF. When arterial voxels were included in the blind estimation algorithm, the resulting AIF was similar to the measured input function. The “true” Ktrans values in tumor regions were not significantly different than the estimated values, .99±.41 and .86±.40 min−1 respectively, p=0.27. “True” kep values also matched closely, .70±.24 and .65±.25 min−1, p=0.08. When only tissue curves free of significant vascular contribution are used (vp<0.05), the resulting AIF showed substantial delay and dispersion consistent with a more local AIF such as has been observed in dynamic susceptibility contrast imaging in the brain.
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影响因子:
4.4
作者:
Cheng, Hai-Ling Margaret
通讯作者:
Cheng, Hai-Ling Margaret
影响因子:
4.4
作者:
Yankeelov, Thomas E.;DeBusk, Laura M.;Gore, John C.
通讯作者:
Gore, John C.
影响因子:
3.5
作者:
Schabel, Matthias C.;Parker, Dennis L.
通讯作者:
Parker, Dennis L.
影响因子:
3.3
作者:
WENDLAND, MF;SAEED, M;HIGGINS, CB
通讯作者:
HIGGINS, CB
DOI:
10.1109/4233.908397
发表时间:
2001-03-01
影响因子:
--
作者:
Wong, KP;Feng, DG;Fulham, MJ
通讯作者:
Fulham, MJ