Transition zone: effect on image quality of CT virtual reality

Kenneth D. Hopper

doi:10.1117/12.428180

21 May 2001 Transition zone: effect on image quality of CT virtual reality

Kenneth D. Hopper

Proceedings Volume 4321, Medical Imaging 2001: Physiology and Function from Multidimensional Images; (2001) https://doi.org/10.1117/12.428180
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

Abstract

CT virtual reality is an exciting new technique for use in the colon, airways, and paranasal sinuses. Most work in this exciting new modality, however, has used surface rendering where a single threshold value is chosen to delineate a 100% opaque wall from an air-filled lumen. We have found that there is a transition layer 3 - 4 voxels thick between the wall and the lumen corresponding to the mucosa. When this transition layer is reconstructed separately using volumetric rendering, the mucosal detail is dramatically improved. We performed a study to prove this point using 27 anatomical sites and pathological lesions evaluated by 4 blinded reviewers. Each lesion was reconstructed with surface rendering with 3 different threshold values, and with volumetric rendering with the transition zone (mucosa) reconstructed separately. In this study, volumetric rendering with the transition zone reconstructed as a separate structure overwhelmingly was rated as best (p equals 0.0001). The added mucosal detail with volumetric rendering using this approach is significant. This technique should be considered for all virtual reality applications.

Citation Download Citation

Kenneth D. Hopper "Transition zone: effect on image quality of CT virtual reality", Proc. SPIE 4321, Medical Imaging 2001: Physiology and Function from Multidimensional Images, (21 May 2001); https://doi.org/10.1117/12.428180

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