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Explicit geometric model of a radioscopic imaging system

机译:放射成像系统的显式几何模型

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In this paper a new explicit model of a radioscopic imaging system is presented. The model includes three parts: X-ray projection, image intensifier and CCD camera. The X-ray projection is modelled as a linear central projection. The image intensifier is modelled using a new explicit model that considers the curved input screen and the non-linear projection caused by electromagnetic fields. The CCD camera is modelled according to a general 2D projective transformation of the output screen of the image intensifier. Thus, the back-projection, required for 3D reconstruction, can be expressed in a closed-form. The model is compared to seven other known models. The presented model achieves high accuracy.
机译:本文提出了一种新的放射成像系统的显式模型。该模型包括三个部分:X射线投影,图像增强器和CCD相机。 X射线投影被建模为线性中心投影。使用新的显式模型对图像增强器进行建模,该模型考虑了弯曲的输入屏幕和电磁场引起的非线性投影。 CCD摄像机是根据图像增强器输出屏幕的一般2D投影变换建模的。因此,可以以封闭形式表示3D重建所需的反投影。该模型与其他七个已知模型进行了比较。提出的模型实现了高精度。

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