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Since these source-detector maps for one projection are generated based on the same excitation source and neighboring detectors, there are correlations among these vectors in each sub weight matrix.
The mean exposure time for all subjects for one projection was 30 seconds (SD 2.4) including centering and acquisition.
For one projection analyzed by Scannell et al. (1995) and Hilgetag et al. (2000b), no Δtype was available, because it targeted a region which had not been assigned a structural type.
As the number of averages was set to four, we recorded eight images (four FG and four BG images) for one projection image, requiring less than one second with the 10 Hz pulse repetition and camera frame rate.
Similar(54)
To further reduce the noise resulting from unavoidable inconsistencies with real projection data, the correction terms are simultaneously applied for all of the rays in one projection as in SIRT.
However, for the experiments in this paper, only one projection per data will be used.
One projection per spectrum is sufficient for reconstructing spatially homogeneous spectral images, since projections of neighboring locations can be combined to infer each spectrum.
The time for the phase retrieval of one single projection is dominated by the required 2D FFT whose complexity is O (N log(N)), with N the number of pixels in one projection.
A square diagram is the easiest to produce, though not a one-to-one projection for ±ISO mechanisms (±ISO is projected onto lines).
On the other hand, a diamond diagram is a one-to-one projection for all mechanisms, but the horizontal axis has a singularity.
Two sensors were fastened adjacent to one another underneath the compression paddle (model 1014011, dimensions: 28 × 20 × 0.16 cm) (Fig. 2) for one of the projection images (see above) and then removed before the remaining images were acquired because the sensors are radiopaque (Fig. 3).
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