Related Experiment Video
Updated: May 3, 2026
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Adaptive zooming in X-ray computed tomography
Andrei Dabravolski1, Kees Joost Batenburg2, Jan Sijbers1
1iMinds-Vision Lab, University of Antwerp, Antwerpen, Belgium.
Background:
In computed tomography (CT), the source-detector system commonly rotates around the object in a circular trajectory. Such a trajectory does not allow to exploit a detector fully when scanning elongated objects.
Objective:
Increase the spatial resolution of the reconstructed image by optimal zooming during scanning.
Methods:
A new approach is proposed, in which the full width of the detector is exploited for every projection angle. This approach is based on the use of prior information about the object's convex hull to move the source as close as possible to the object, while avoiding truncation of the projections.
Results:
Experiments show that the proposed approach can significantly improve reconstruction quality, producing reconstructions with smaller errors and revealing more details in the object.
Conclusions:
The proposed approach can lead to more accurate reconstructions and increased spatial resolution in the object compared to the conventional circular trajectory.
More Related Videos
Related Concept Videos
01:10Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
01:24X-ray Imaging
01:27Imaging Studies III: Computed Tomography
01:07Electron Microscope Tomography and Single-particle Reconstruction
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...