The described work is part of the COVIRA project whose goal is to provide prototypes of clinical workstations for neuroradiological diagnostics and therapy, neurosurgery and 3D radiation therapy for evaluation in several hospitals. An important aspect is the 3D reconstruction and visualisation of the cerebral vessel tree based on several DSA projections combined with an MRA volume data set. This combination promises a higher resolution than that yielded by MRA data alone. This paper presents tools for supporting the 3D reconstruction: the segmentation of blood vessels, the extraction of vessel intensities, diameters and centre lines. During the 3D reconstruction these features reduce the ambiguity that is present when only segmented binary image are used. A further application of these tools is the enhanced representation of blood vessels in 2D images. Blood vessels down to a diameter of 2 pixels can be intensified and visualised even if they are poorly filled with contrast agent. In a first evaluation radiologists confirmed the improved quality and the detailed resolution.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 email@example.com
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 firstname.lastname@example.org