Home

Article Search

TABLE 1. Scan set up conditions for the scan parameter experiment and the repeatability experiment. The full range of trials for the repeatability experiment (i.e., three replicates of three exposure times at three levels of averaging) could not be completed because the shell broke during the scan parameter experiment. All data, except for the last scan in the scan parameter experiment with the double voxel size, are plotted in Figure 1.

Scan parameter experiment
exposure time
(ms)
# x-ray radiographs
averaged per view
# replicate scans time
(mins)
voxel size
(µm)
200 2 1 15 1.86
200 3 2 20 1.86
200 5 1 30 1.86
333 3 1 33 1.86
333 5 1 50 1.86
400 4 1 50 1.86
500 2 1 37 1.86
500 3 1 50 1.86
500 5 1 75 1.86
500 5 1 75 3.72
Repeatability experiment
exposure time
(ms)
#x-ray radiographs
averaged per view
# replicate scans time
(mins)
voxel size
(µm)
333 3 3 33 1.70
333 4 3 41 1.70
333 5 1 50 1.70
400 3 1 40 1.70
400 4 1 50 1.70
400 5 1 60 1.70
500 3 1 50 1.70
500 4 3 62 1.70
500 5 2 75 1.70

 

 

TABLE 2. Average and standard deviation values showing how calculated shell volume varied with the different scan parameters in the two experiments.

Scan parameter experiment
Scan time
(mins)
Average volume
(mm3)
St. dev n
0-20 0.0477 0.0025 3
21-40 0.0480 0.0014 4
41-60 0.0503 0.0012 3
61-80 0.0500 n/a 1
Repeat scans experiment
Exposure time
(mins)
Average volume
(mm3)
St. dev n
333 0.0335 0.0006 7
400 0.0335 0.0005 3
500 0.0340 0.0003 6
# x-ray radiographs
 av. per view
Average volume
(mm3)
St. dev n
3 0.0334 0.0006 5
4 0.0337 0.0003 7
5 0.0342 0.0004 4
Scan time
(mins)
Average volume
(mm3)
St. dev n
21-40 0.0333 0.0006 4
41-60 0.0338 0.0004 7
61-80 0.0340 0.0004 5

logo smallPalaeontologia Electronica
Webmaster
1998–2020
23 years of electronic palaeontology

PE is archived by CLOCKSS and LOCKSS programs.