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Titolo:
Analysis of artifacts found in endographic visualization of spiral CT scans.
Autore:
Bode, A; Dammann, F; Pelikan, EHW; Heuschmid, M; Schwaderer, E; Schaich, M; Claussen, CD;
Indirizzi:
Univ Tubingen, Radiol Klin, Abt Radiol Diagnost, D-72076 Tubingen, GermanyUniv Tubingen Tubingen Germany D-72076 agnost, D-72076 Tubingen, Germany Philips Med Syst Hamburg, Hamburg, Germany Philips Med Syst Hamburg Hamburg Germany Syst Hamburg, Hamburg, Germany
Titolo Testata:
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
fascicolo: 3, volume: 173, anno: 2001,
pagine: 245 - 252
SICI:
1438-9029(200103)173:3<245:AOAFIE>2.0.ZU;2-A
Fonte:
ISI
Lingua:
GER
Soggetto:
SPATIAL-RESOLUTION; VIRTUAL ENDOSCOPY; 3-DIMENSIONAL CT; HELICAL CT; ANGIOGRAPHY; PERSPECTIVE; PARAMETERS;
Keywords:
CT; three-dimensional; image processing; artifact; phantoms;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Dammann, F Univ Tubingen, Radiol Klin, Abt Radiol Diagnost, Hoppe Seyler Str 3, D-72076 Tubingen, Germany Univ Tubingen Hoppe Seyler Str 3 Tubingen Germany D-72076 many
Citazione:
A. Bode et al., "Analysis of artifacts found in endographic visualization of spiral CT scans.", ROFO-F RONT, 173(3), 2001, pp. 245-252

Abstract

Purpose: Analysis of patterns and causes of artifacts found in endographicvisualization of spiral CT data. Materials and methods: A straight perspextube with a diameter of 20 mm was scanned in three different positions with ten scan protocols of varying table feed, increment, kernel, and signal to noise ratio (Tomoscan AVE, Philips). The resulting 30 CT datasets were visualized as a virtual endoscopy (VE) with ten different visualization protocols (Easy Vision 4.2, Philips) of varying threshold, resolution, and perspective angle. 300 VE datasets were analyzed by two radiologists and compared with the Visualization of a software-generated tube in order to differentiate scanning and software artifacts. Results: Five different classes of artifacts have been identified. Two of them result from the scanning process and two from the specific Visualization method. Spiral patterns and the unevenness of the tube wall vary with the scanning parameter. Moire-like patterns are caused by the VE software and depend on the visualization matrix. Ahigh perspective angle distorts the size and form of the tube and makes itdifficult for the observer to locate his position within the tube. The appearance of pseudoforamina depends on both the scanning and the visualization parameters. Conclusion: The knowledge of the patterns and potential causes of artifacts in endographic Visualization of spiral CT scans are the basis for interpretation and optimization of this visualization method.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 12:29:17