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Carbonate sample • 20mm by 5 mm sample • 4 revolutions of data • 1760 x 1760 x 6000 voxels • 3.5 micron voxel size • 400mm wide detector • 330mm camera length • >10x speed-up Circular scan with same camera length
Summary • better SNR at high cone angle • good tomogram with 2048 3 from 4 hours acquisition • routine imaging of long objects • successfully reconstructed tomogram: 2048 x 2048 x 8192 • limited by • acquisition time • disk space • computer memory • 100mm vertical travel • currently ~1.5 micron resolution
Page 1 and 2: Theoretically-exact CT-reconstructi
Page 3 and 4: Can we reconstruct an object from X
Page 9: Can we reconstruct a 3D object from
Page 12 and 13: Why helical micro-CT? • Image lon
Page 14 and 15: Why helical micro-CT? • Image lon
Page 16 and 17: Reservoir carbonate • 556mm camer
Page 18 and 19: • • • discrete implementation
Page 20 and 21: 1.0ou change in alignment parameter
Page 22 and 23: Detector offset misalignment
Page 25 and 26: Optimisation-based reconstruction I
Page 27 and 28: Katsevich FFBP Horizontal detector
Page 29 and 30: Optimisation-based reconstruction I
Page 31 and 32: • • Auto-focus alignment post-p
Page 33 and 34: Sample distance • 556mm camera le
Page 35 and 36: Sample distance • 556mm camera le
Page 37: Comparison old vs. new system old:

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