Small ROI

Small Region of Interest (ROI) includes a series of data sets in which the sample is larger than the field of view (see table below). The related sample description and the experimental conditions are reported in tables below.

Double Bamboo Tin Wire

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

tomopy recon --file-name tomo_00022.h5 --rotation-axis 980
tomopy recon --file-name tomo_00023.h5 --rotation-axis 893
tomopy recon --file-name tomo_00024.h5 --rotation-axis 972

tomo_ID

00022

Image preview

00022

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tomo_00022

Instrument

Elettra Syrmep

Sample name

Double Bamboo Tin Wire

X-ray energy

white beam mode

Ring energy

2 GeV

Exposure time

1 s

Detector

SCMOS 16-bit

Sample-to-detector distance

150 mm

Pixel size

2.4 µm

Scan Range

180 degree

Number of Projections

400

Rotation axis location

980

Bamboo Wires 2

tomo_ID

00023

Image preview

00023

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tomo_00023

Instrument

Elettra Syrmep

Sample name

Bamboo Wires 2

X-ray energy

white beam mode

Ring energy

2 GeV

Exposure time

1 s

Detector

SCMOS 16-bit

Sample-to-detector distance

150 mm

Pixel size

2.6 µm

Scan Range

180 degree

Number of Projections

1800

Rotation axis location

893

Polystyrene

tomo_ID

00024

Image preview

00024

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tomo_00024

Instrument

Elettra Syrmep

Sample name

Polystyrene

X-ray energy

white beam mode

Ring energy

2 GeV

Exposure time

1 s

Detector

SCMOS 16-bit

Sample-to-detector distance

150 mm

Pixel size

2.04 µm

Scan Range

180 degree

Number of Projections

400

Rotation axis location

972

Electrode Particles

Detection and quantification of grey level differences of ca. 1% in the electrode particles – local tomography is making this challenging task even more difficult. Standard solutions used at the TOMCAT beamline (e.g. constant padding) are not sufficient in the phase retrieved case [B36], if small grey level differences need to be reliably detected.

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

tomopy recon --file-name tomo_00070.h5 --rotation-axis 1289

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

tomo_ID

00070

Image preview

00070

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tomo_00070

Instrument

SLS TOMCAT

Sample name

SLS_02

X-ray energy

24.999 keV

Sample-to-detector distance

50 mm

Scan Range

180 degree

Number of Projections

1201

White Fields

200 (100 before 100 after)

Dark Fields

10

Pixel size

0.65 µm

Rotation axis location

1289.09525072

TomoLab

A second series of data sets (see table below) were acquired by microfocus CT at the TomoLab station of Elettra using a cone-beam geometry. The sample description and the experimental conditions are reported in tables below under tomo_00027 to tomo_00030.

Bone local

tomo_ID

00027

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00027

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tomo_00027

Instrument

TomoLab @Elettra

Sample Name

Bone local

Voltage

110 kV

Current

145 µA

Filter

0.1 mm Cu

Focal spot

16 µm

Exposure time/proj

4 s

Detector

CCD 12-bit

Source-to-sample distance

100 mm

Source-to-detector distance

250 mm

Pixel size

10.0 µm

Number of Projections

1800

Scan range

360 degrees

Start angle (degrees)

0

Horizontal image size

2004 pixels

Vertical image size

1335 pixels

Detector horizontal pixel size

25 µm

Detector vertical pixel size

25 µm

Bone local stone

tomo_ID

00028

Image preview

00028

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tomo_00028

Instrument

TomoLab @Elettra

Sample Name

bone local stone

Voltage

60 kV

Current

250 µA

Filter

1.0 mm Al

Focal spot

16 µm

Exposure time/proj

4 s

Detector

CCD 12-bit

Source-to-sample distance

100 mm

Source-to-detector distance

250 mm

Pixel size

10.0 µm

Number of Projections

1800

Scan range

360 degrees

Start angle (degrees)

0

Horizontal image size

2004 pixels

Vertical image size

1335 pixels

Detector horizontal pixel size

25 µm

Detector vertical pixel size

25 µm

Candy local

tomo_ID

00029

Image preview

00029

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tomo_00029

Instrument

TomoLab @Elettra

Sample Name

Candy local

Voltage

70 kV

Current

114 µA

Filter

1.5 mm Al

Focal spot

8 µm

Exposure time/proj

6 s

Detector

CCD 12-bit

Source-to-sample distance

100 mm

Source-to-detector distance

250 mm

Pixel size

10.0 µm

Number of Projections

1800

Scan range

360 degrees

Start angle (degrees)

0

Horizontal image size

2004 pixels

Vertical image size

1335 pixels

Detector horizontal pixel size

25 µm

Detector vertical pixel size

25 µm

Smiling sample

tomo_ID

00030

Image preview

00030

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tomo_00030

Instrument

TomoLab @Elettra

Sample Name

Smiling sample

Voltage

60 kV

Current

300 µA

Filter

1.5 mm Al

Focal spot

20 µm

Exposure time/proj

1 s

Detector

CCD 12-bit

Source-to-sample distance

250 mm

Source-to-detector distance

350 mm

Pixel size

58.0 µm

Number of Projections

720

Scan range

360 degrees

Start angle (degrees)

0

Horizontal image size

668 pixels

Vertical image size

445 pixels

Detector horizontal pixel size

75 µm

Detector vertical pixel size

75 µm