A general concept is presented for increasing the in-slice spatial resolution in computed tomography in a flexible manner, and with relatively large source focal spots and detector pixels. The flexibility is a result of probing the sample by an array of thin beamlets shaped by a mask. Provided that the mask apertures are smaller than the combined blur of the x-ray source and detector, and that no significant overlap between beamlets occurs, this introduces higher spatial frequencies into the image formation process. The application of a cycloidal acquisition scheme, by which the sample is simultaneously rotated and translated, facilitates an efficient exploitation of these frequencies and their reconstruction into high-resolution tomographic images. Additionally, a preliminary study of signal-to-noise ratio vs. delivered dose reveals significant dose saving potential.

中文翻译：

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摆线计算机断层扫描

提出了一种总体概念，用于以灵活的方式增加计算机断层摄影中的片内空间分辨率，并具有相对较大的源焦点和检测器像素。灵活性是通过由掩模形成的一系列细小光束探测样品的结果。假设掩模孔径小于X射线源和检测器的组合模糊，并且子束之间没有出现明显的重叠，这会将较高的空间频率引入图像形成过程。摆线采集方案的应用，使样品同时旋转和平移，有助于有效利用这些频率并将其重构为高分辨率断层图像。此外，初步研究了信噪比vs.