Skip to content

application - NXtomo: add 'half_acquisition' field. #1643

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
payno wants to merge 2 commits into
base: main
Choose a base branch
from
Open

application - NXtomo: add 'half_acquisition' field. #1643

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
2cd040d
application - NXtomo: add 'half_acquisition' field.
payno Jul 21, 2026
be85b96
Nexus application - NXtomo - update description of the `half_acquisit…
payno Sep 3, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 14 additions & 0 deletions applications/NXtomo.nxdl.xml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,20 @@
</field>
<field name="x_rotation_axis_pixel_position" type="NX_FLOAT" minOccurs="0" maxOccurs="1"/>
<field name="y_rotation_axis_pixel_position" type="NX_FLOAT" minOccurs="0" maxOccurs="1"/>
<field name="half_acquisition" type="NX_BOOLEAN" minOccurs="0" maxOccurs="1">
<doc>
In tomography, half-acquisition scanning mode allows you to double the field of view.

In half-acquisition mode, the rotation axis is deliberately offset toward one edge of the detector.
And the sample is not fully covered by the detector at any given angle.

As a consequence, a pre-processing step is required to reconstruct the complete (full-field of view) sinogram
before performing the tomographic reconstruction (stitching/merging of the projections acquired at complementary angles).

Also note that acquisitions with an offset rotation center are not necessarily half-acquisitions, and conversely,
if the rotation axis is not offset, the half-acquisition mode loses its purpose.
</doc>
</field>
</group>
</group>
<group type="NXsample" name="sample">
Expand Down
Loading