Image derived input function for [18F]-FEPPA: application to quantify translocator protein (18 kDa) in the human brain.

Image derived input function for [18F]-FEPPA: application to quantify translocator protein (18 kDa) in the human brain.
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DOI:
10.1371/journal.pone.0115768
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Strafella AP
Strafella AP
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Mabrouk R;Rusjan PM;Mizrahi R;Jacobs MF;Koshimori Y;Houle S;Ko JH;Strafella AP

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在[18F]-FEPPA正电子发射断层扫描(PET)成像中,自动采血系统(ABSS)是目前获得提取输入函数(IF)所需的血液时间活性曲线(TAC)的金标准。在这里,我们比较了两种基于图像的IF提取方法的性能,ABSS金标准方法用于定量人脑中的转运蛋白(TSPO)。从颈内动脉信号(CS)的直接描绘和独立成分分析(伊卡)的新概念,获得的IF。PET扫描从18名健康志愿者获得。将CS-IF和ICA-IF估计的总分布容积(VT)与ABSS-IF获得的额叶和颞叶皮质、小脑、纹状体和丘脑区域的参考VT进行比较。对于所有脑区,使用ICA-IF估计的VT值比CS-IF更可靠。具体而言,使用ICA-IF的额叶皮层的斜率回归为r2 = 0.91(p<0.05),使用CS-IF的斜率回归为r2=0.71(p<0.05)。   
In [18F]-FEPPA positron emission topography (PET) imaging, automatic blood sampling system (ABSS) is currently the gold standard to obtain the blood time activity curve (TAC) required to extract the input function (IF). Here, we compare the performance of two image-based methods of IF extraction to the ABSS gold standard method for the quantification of translocator protein (TSPO) in the human brain. The IFs were obtained from a direct delineation of the internal carotid signal (CS) and a new concept of independent component analysis (ICA). PET scans were obtained from 18 healthy volunteers. The estimated total distribution volume (VT) by CS-IF and ICA-IF were compared to the reference VT obtained by ABSS-IF in the frontal and temporal cortex, cerebellum, striatum and thalamus regions. The VT values estimated using ICA-IF were more reliable than CS-IF for all brain regions. Specifically, the slope regression in the frontal cortex with ICA-IF was r2 = 0.91 (p<0.05), and r2 = 0.71 (p<0.05) using CS-IF.
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