The x-ray beam passes through beryllium windows in the vessels. A seal separates the specimen from the rotational stage so that the specimen remains frozen and no moisture can condense on or in the vessel. Iliac Crest Biopsy Scanned at - 80 F Volume rendered display of bone biopsy with cortical bone on right edge and cancellous bone in left two thirds of image. In case of optic at 50 mm the x-ray flux is 4 greater than at 100 mm. Left image shows ring artifact in CT image due to a defect in the CsI fluorescent crystal plate.
Right image shows the same slice reconstructed without the ring artifact.
This was achieved by shifting the specimen back and forth by 10 CCD pixel widths in the horizontal direction for alternate angles of view. The defects in the two data sets were then replaced by the good data in the alternate images. Example of super resolution tomography. Note that it provides resolution comparable to a regular reconstruction with twice the number of rays per angle of view. Specimen Manipulation Bone Strain Estimated from Progressive Torque 3D image of the magnitude of the first principal strain at sequential nested shells within the bone cortex.