X-ray sCMOS camera with on-chip scintillator enables fast phase-contrast tomography
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چکیده
For the recording of a fast tomogram a continuous recording mode is established. This enables the stepless measurement of projections over the full range of 360° in a specifi ed time (here 70 s, leading to 1994 projections in total) while the exposure time is kept constant at 25 ms. The high speed of 30 fps (full sensor resolution) and the high effi ciency of the detector, together with the high fl ux of the X-ray source, facilitate such small exposure times. The 3D volume is obtained from a phase retrieval, which uses the Bronnikovaided correction (BAC) algorithm [8], followed by a standard fi ltered back projection. Figure 1 Top: sketch of the setup consisting of the source, sample and the X-ray detector. Bottom: photograph of the setup X-ray source
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