Spheres

These sphere data sets [B39] contains samples with varied volume fractions of borosilicate glass spheres encased in a polypropylene matrix [B5]. The sphere diameter is a gaussian distribution ranging from 38-45 µm. The samples were scanned at both 25 mm and 60 mm sample to detector distance with the experimental conditions reported in the table below:

Instrument

APS 2-BM-A fast tomo

Energy

27.4 keV

Monochromator

multi-layer

Scan Range

180 degree

Number of Projections

1500

White Fields

10 before

Dark Fields

10 before

Mode

fly-scan

Rotation Speed

0.75 deg/s

Sample Detector Distance

60 mm

Attenuator

mm C + 1mm Glass

Detector Name

PCO edge

Exposure Time

0.0001 s

Pixel Size

0.65 µm

Detector shutter mode

global

Detector Dimension x

2560

Detector Dimension y

2160

Objective Magnification

Mitutoyo 10x

Scintillator

LuAG 10 µm

The sphere data sets includes 6 tomographic data sets collected at different sample to detector distance and different concentrations as reported in the table below:

To load the data sets and perform a basic reconstruction using tomopy

tomopy recon --file-name tomo_00058.h5 --rotation-axis 1427
tomopy recon --file-name tomo_00059.h5 --rotation-axis 1440
tomopy recon --file-name tomo_00060.h5 --rotation-axis 1337
tomopy recon --file-name tomo_00061.h5 --rotation-axis 1316.5
tomopy recon --file-name tomo_00062.h5 --rotation-axis 1359.5
tomopy recon --file-name tomo_00063.h5 --rotation-axis 1322,5

To enable phase retrieval un-comment the appropriate setting in tomopy_rec.py

Tomo ID

Concentration (%)

Distance

Sample Name

Image

Axis

tomo_00058

20

60

Somya_20_60

00058

1427

tomo_00059

30

60

Somya_30_60

00059

1440

tomo_00060

30

25

Somya_30_25

00060

1337

tomo_00061

20

25

Somya_20_25

00061

1316.5

tomo_00062

10

25

Somya_10_25

00062

1359.5

tomo_00063

5

25

Somya_5_25

00063

1322.5