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Virtual pyeloscopy using volumetric depth peeling.

Julia R Fielding·David Borland·Kang Hoon Lee·John P Clarke·Eric Wallen·Raj Pruthi·Russell M Taylor
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Abstract

RATIONALE AND OBJECTIVES: The aim of the study is to test a new volume-rendering method, volumetric depth peeling (VDP), for use in virtual pyeloscopy. MATERIALS AND METHODS: VDP was applied to axial contrast-enhanced source computed tomographic (CT) images and coronal reformatted maximum intensity projections of three contrast-filled gloves containing objects of varying density. Similar renderings were performed on CT urograms performed to evaluate hematuria (n = 20). Renderings were assessed for anatomic appearance of ureters and specific calyces in comparison with source images. RESULTS: Objects of soft-tissue and calcific density ranging in size from 4 to 20 mm were identified by using VDP within the glove phantoms. Normal and deformed renal calyces were well visualized by using VDP; however, two stones were not identified. The minimal ureteral width that could be visualized was 3 mm. CONCLUSION: VDP may be a useful technique for virtual pyeloscopy providing that a robust and user-friendly computer interface can be developed.

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EndoscopyHumansImaging, Three-DimensionalKidney CalculiPilot ProjectsRadiographic Image Interpretation, Computer-AssistedTomography, X-Ray ComputedUser-Computer InterfaceJournal Article

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Julia R Fielding, David Borland, Kang Hoon Lee, John P Clarke, Eric Wallen, Raj Pruthi, Russell M Taylor. 2006. Virtual pyeloscopy using volumetric depth peeling.. https://doi.org/10.1016/j.acra.2006.02.042

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