oai:publications.rwth-aachen.de:62248
type: CreativeWork
name: Untersuchung zur technischen Durchführbarkeit der schwellenwertabhängigen Bildsegmentierung bei der óvirtuellen Endoskopieƒ des oberen Harntraktes auf der Basis kontrastangehobener T1-gewichteter MR-Urographie-Datensätze
description: This study evaluated the technical feasibility of the threshold value dependent image segmentation in virtual endoscopy of the upper urinary tract based on contrast-enhanced T1-weighted MR urography data sets. The aim was to find out whether different pathological structures could be differentiated from each other. Method: The data obtained from 69 gadolinium-enhanced MR-urographic examinations were post-processed to recunstruct a virtual endoscopy of the upper urinary tract using a threshold image segmentation. Results: Different pathological structures (tumor, nephroliths, stenosis) and filling defects could be evaluated from endoluminal view using the virtual endoscopy. By the reconstructed pictures the classification of the presented pathological structures could unfortunately not be achived in each single case. The exact characterisation of the pathological findings based only on the assessment of the surface structure was often impossible. Technical improvement in the near future will probably let it become possible.
abstract: This study evaluated the technical feasibility of the threshold value dependent image segmentation in virtual endoscopy of the upper urinary tract based on contrast-enhanced T1-weighted MR urography data sets. The aim was to find out whether different pathological structures could be differentiated from each other. Method: The data obtained from 69 gadolinium-enhanced MR-urographic examinations were post-processed to recunstruct a virtual endoscopy of the upper urinary tract using a threshold image segmentation. Results: Different pathological structures (tumor, nephroliths, stenosis) and filling defects could be evaluated from endoluminal view using the virtual endoscopy. By the reconstructed pictures the classification of the presented pathological structures could unfortunately not be achived in each single case. The exact characterisation of the pathological findings based only on the assessment of the surface structure was often impossible. Technical improvement in the near future will probably let it become possible.
author: Jacke, Christina
language: ger
keywords: info:eu-repo/classification/ddc/610, Medizin, upper urinary tract, MR-urography, virtual endoscopy
date published: 2007
date modified: 2026-07-30T19:43:19Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University