Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

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Gewählte Publikation:

Sorantin, E; Halmai, C; Erdohelyi, B; Palágyi, K; Nyúl, LG; Ollé, K; Geiger, B; Lindbichler, F; Friedrich, G; Kiesler, K.
3D cross section of the laryngotracheal tract. A new method for visualization and quantification of tracheal stenoses
RADIOLOGE. 2003; 43(12): 1056-1068. Doi: 10.1007/s00117-003-0990-8
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Führende Autor*innen der Med Uni Graz
Sorantin Erich
Co-Autor*innen der Med Uni Graz
Friedrich Gerhard
Kiesler Karl
Lindbichler Franz

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PURPOSE: Demonstration of a technique for 3D assessment of tracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts.
Find related publications in this database (using NLM MeSH Indexing)
Adolescent -
Adult -
Aged -
Aged, 80 and over -
Child -
Child, Preschool -
Female -
Humans -
Image Processing, Computer-Assisted -
Imaging, Three-Dimensional -
Infant -
Laryngoscopy -
Laryngostenosis - congenital Laryngostenosis - radiography
Male -
Middle Aged -
Reference Values -
Sensitivity and Specificity -
Tomography, Spiral Computed -
Tracheal Stenosis - congenital Tracheal Stenosis - radiography

Find related publications in this database (Keywords)
image processing
biomedical computing
biomedical measurements
feature extraction
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