Quantitative fluorescence tomography with functional and structural a priori information.

Quantitative fluorescence tomography with functional and structural a priori information.
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DOI:
10.1364/ao.48.001328
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发表时间:
2009-03-01
期刊:
影响因子:
1.9
通讯作者:
Gulsen G
Gulsen G
中科院分区:
工程技术4区
文献类型:
--
作者:
Lin Y;Yan H;Nalcioglu O;Gulsen G

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我们论证了功能和结构先验信息的必要性,以定量荧光断层扫描(FT)与体模研究。这里,泛函先验信息被定义为可以由漫反射光学层析成像(DOT)系统测量的非均匀背景的光学特性。建立了一种基于CCD的多视角非接触式混合FT/DOT测量系统。构建了具有多个隔室的多模模体,并在实验中用于模拟非均匀光学背景。直径为3:6 mm的物体嵌入到非均匀光学背景中可以在没有任何先验信息的情况下进行定位,但恢复的荧光团浓度仅为真实浓度的十分之一。另一方面,利用功能先验信息和结构先验信息来指导和约束FT重建算法,可以恢复真实的荧光团浓度。
We demonstrate the necessity of functional and structural a priori information for quantitative fluorescence tomography (FT) with phantom studies. Here the functional a priori information is defined as the optical properties of the heterogeneous background that can be measured by a diffuse optical tomography (DOT) system. A CCD-based noncontact hybrid FT/DOT system that could take measurements at multiple views was built. Multimodality phantoms with multiple compartments were constructed and used in the experiments to mimic a heterogeneous optical background. A 3:6 mm diameter object deeply embedded in a heterogeneous optical background could be localized without any a priori information, but the recovered fluorophore concentration only reached one tenth of the true concentration. On the other hand, the true fluorophore concentration could be recovered when both functional and structural a priori information is utilized to guide and constrain the FT reconstruction algorithm.
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