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Ray Casting With &#8220;On-the-Fly&#8221; Region Growing: 3-D Navigation Into Cardiac MSCT Volume

This paper describes an extended ray casting scheme for three-dimensional (3-D) navigation into the heart cavities for preoperative planning using multislice X-ray computed tomography data. The key benefit is that artifacts due to contrast inhomogeneities can be eliminated during volume traversal, thus improving the visual perception of the endocardial wall