Related Experiment Video
Updated: Aug 4, 2026
High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT
Published on: June 21, 2011
Mucosal detail at CT virtual reality: surface versus volume rendering
K D Hopper1, A T Iyriboz, S W Wise
1Department of Radiology, Milton S. Hershey Medical Center, Pennsylvania State University, 500 University Dr, Hershey, PA 17033, USA. khopper@psu.edu
Purpose:
To evaluate computed tomographic virtual reality with volumetric versus surface rendering.
Materials And Methods:
Virtual reality images were reconstructed for 27 normal or pathologic colonic, gastric, or bronchial structures in four ways: the transition zone (a) reconstructed separately from the wall by using volume rendering; (b) with attenuation equal to air; (c) with attenuation equal to wall (soft tissue); (d) with attenuation halfway between air and wall. The four reconstructed images were randomized. Four experienced imagers blinded to the reconstruction graded them from best to worst with predetermined criteria.
Results:
All readers rated images with the transition zone as a separate structure as overwhelmingly superior (P <.001): Nineteen cases had complete concurrence among all readers. The best of the surface-rendering reconstructions had the transition zone attenuation equal to the wall attenuation (P <.001). The third best reconstruction had the transition zone attenuation equal to the air attenuation, and the worst had the transition zone attenuation halfway between the air and wall attenuation.
Conclusion:
Virtual reality is best with volume rendering, with the transition zone (mucosa) between the wall and air reconstructed as a separate structure.
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