A novel reconstruction tool (syngo DynaCT Head Clear) in the post-processing of DynaCT images to reduce artefacts and improve image quality

Journal of Neurointerventional Surgery
Stephanie LescherMarlies Wagner

Abstract

Latest generations of flat detector (FD) neuroangiography systems are able to obtain CT-like images of the brain parenchyma. Owing to the geometry of the C-arm system, cone beam artifacts are common and reduce image quality, especially at the periphery of the field of view. An advanced reconstruction algorithm (syngo DynaCT Head Clear) tackles these artifacts by using a modified interpolation-based 3D correction algorithm to improve image quality. Eleven volumetric datasets from FD-CT scans were reconstructed with the standard algorithm as well as with the advanced algorithm. In a two-step data analysis process, two reviewers compared dedicated regions of the skull and brain in both reconstruction modes using a 5-point scale (1, much better; 5, much worse; advanced vs standard algorithm). Both reviewers were blinded to the reconstruction mode. In a second step, two additional observers independently evaluated image quality of the 3D data (non-comparative evaluation) in dedicated regions also using a 5-point scale (1, not diagnostically evaluable; 5, good quality, perfectly usable for diagnosis) for both reconstruction algorithms. Both in the comparative evaluation of dedicated brain regions and in the independent analysis of th...Continue Reading

References

Jun 26, 2007·European Radiology·Willi A Kalender, Yiannis Kyriakou
Sep 26, 2007·AJNR. American Journal of Neuroradiology·G RichterA Doerfler
Jun 1, 2013·AJNR. American Journal of Neuroradiology·I M J van der BomA K Wakhloo
Jun 19, 2013·Radiological Physics and Technology·Mitsuaki TerabeKichiro Koshida

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