Model selection for DCE-T1 studies in glioblastoma.
Model selection for DCE-T1 studies in glioblastoma.
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DOI:
10.1002/mrm.23211
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发表时间:
2012-07
影响因子:
3.3
通讯作者:
Ewing, James. R.
中科院分区:
文献类型:
--
作者:
Bagher-Ebadian, Hassan;Jain, Rajan;Nejad-Davarani, Siamak P.;Mikkelsen, Tom;Lu, Mei;Jiang, Quan;Scarpace, Lisa;Arbab, Ali S.;Narang, Jayant;Soltanian-Zadeh, Hamid;Paudyal, Ramesh;Ewing, James. R.
Dynamic Contrast Enhanced T1-Weighted MRI (DCE-T1) using the contrast agent (CA) Gd-DTPA was performed on ten patients with glioblastoma (GBM). Nested models with as many as three parameters were employed to estimate plasma volume (vp), or vp and forward vascular transfer constant (Ktrans), or vp, Ktrans, and the reverse vascular transfer constant (kep). These constituted Models 1, 2, and 3, respectively. Model 1 predominated in normal non-leaky brain tissue, showing little or no leakage of CA. Model 3 predominated in regions associated with aggressive portions of the tumor, and Model 2 bordered Model 3 regions, showing leakage at reduced rates. In the patient sample, vp was about four times that of white matter in the enhancing part of the tumor. Ktrans varied by a factor of ten between the Model 2 (1.9 ×10−3 min−1) and Model 3 regions (1.9 ×10−2 min−1). The mean calculated interstitial space (Model 3) was 5.5%. In Model 3 regions, excellent curve fits were obtained to summarize concentration-time data (mean R2 = 0.99). We conclude that the three parameters of the Standard Model are sufficient to fit DCE-T1 data in GBM under the conditions of the experiment.
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影响因子:
14.5
作者:
LEENDERS, KL;PERANI, D;JONES, T
通讯作者:
JONES, T
DOI:
10.1073/pnas.0804224105
发表时间:
2008-11-18
影响因子:
11.1
作者:
Li, Xin;Huang, Wei;Springer, Charles S., Jr.
通讯作者:
Springer, Charles S., Jr.
影响因子:
3.3
作者:
Johnson, G;Wetzel, SG;Tofts, PS
通讯作者:
Tofts, PS
影响因子:
3.3
作者:
Li, X;Rooney, WD;Springer, CS
通讯作者:
Springer, CS
影响因子:
3.3
作者:
Deoni, SCL;Peters, TM;Rutt, BK
通讯作者:
Rutt, BK