Optimal analysis method for dynamic contrast-enhanced diffuse optical tomography.

Optimal analysis method for dynamic contrast-enhanced diffuse optical tomography.
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DOI:
10.1155/2011/426503
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发表时间:
2011
影响因子:
7.6
通讯作者:
Gulsen G
Gulsen G
中科院分区:
其他
文献类型:
--
作者:
Ghijsen M;Lin Y;Hsing M;Nalcioglu O;Gulsen G

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扩散光学断层扫描(DOT)是一种具有各种临床应用的光学成像模式。然而,由于生物组织中的强光子散射,DOT的空间分辨率和定量精度较差。来自另一种高空间分辨率成像模态(诸如磁共振成像(MRI))的结构先验信息已被证明显著提高DOT准确性。此外,可以使用造影剂通过使用动态对比增强DOT(DCE-DOT)来获得病变的差分吸收图像。这产生相对吸收图,其包括从包括光学对比度的重建图像中减去重建基线图像。在这项研究中,我们研究和比较了不同的重建方法和分析方法,经常内源性DOT和DCE-DOT与和没有MR解剖先验信息的任意形状的对象。我们的模型和动物研究表明,上级图像质量和更高的精度可以实现使用DCE-DOT与MR结构先验信息。因此,实施组合的MRI-DOT系统来成像ICG增强可能是乳腺癌成像的有前途的工具。
Diffuse Optical Tomography (DOT) is an optical imaging modality that has various clinical applications. However, the spatial resolution and quantitative accuracy of DOT is poor due to strong photon scatting in biological tissue. Structural a priori information from another high spatial resolution imaging modality such as Magnetic Resonance Imaging (MRI) has been demonstrated to significantly improve DOT accuracy. In addition, a contrast agent can be used to obtain differential absorption images of the lesion by using dynamic contrast enhanced DOT (DCE-DOT). This produces a relative absorption map that consists of subtracting a reconstructed baseline image from reconstructed images in which optical contrast is included. In this study, we investigated and compared different reconstruction methods and analysis approaches for regular endogenous DOT and DCE-DOT with and without MR anatomical a priori information for arbitrarily-shaped objects. Our phantom and animal studies have shown that superior image quality and higher accuracy can be achieved using DCE-DOT together with MR structural a priori information. Hence, implementation of a combined MRI-DOT system to image ICG enhancement can potentially be a promising tool for breast cancer imaging.
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