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Titolo:
Multi-slice CT for visualization of pulmonary embolism using perfusion weighted color maps
Autore:
Wildberger, JE; Niethammer, MU; Klotz, E; Schaller, S; Wein, BB; Gunther, RW;
Indirizzi:
Univ Aachen, Dept Diagnost Radiol, D-5100 Aachen, Germany Univ Aachen Aachen Germany D-5100 iagnost Radiol, D-5100 Aachen, Germany Siemens Med Engn, Computed Tomog, Forchheim, Germany Siemens Med Engn Forchheim Germany , Computed Tomog, Forchheim, Germany
Titolo Testata:
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
fascicolo: 4, volume: 173, anno: 2001,
pagine: 289 - 294
SICI:
1438-9029(200104)173:4<289:MCFVOP>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
HELICAL CT; SPIRAL CT; COMPUTED-TOMOGRAPHY; ANGIOGRAPHY; DIAGNOSIS;
Keywords:
computed tomography (CT), spiral; computed tomography, (CT), function; embolism, pulmonary; lung, perfusion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Wildberger, JE Univ Hosp, Rhein Westfal TH Aachen, Dept Diagnost Radiol, Pauwelsstr 30, D-52057 Aachen, Germany Univ Hosp Pauwelsstr 30 Aachen Germany D-52057 en, Germany
Citazione:
J.E. Wildberger et al., "Multi-slice CT for visualization of pulmonary embolism using perfusion weighted color maps", ROFO-F RONT, 173(4), 2001, pp. 289-294

Abstract

Purpose: The purpose of our preliminary study was to evaluate the feasibility of a new technique for the perfusion weighted color display of the density of lung parenchyma derived from multi-slice CT (MSCT) data sets of clinical routine examinations for visualization of pulmonary embolism (PE). Materials and Methods: Imaging of patients with suspected PE was performed on a commercially available MSCT (Somatom Volume Zoom; Siemens, Forchheim, Germany) after intravenous application of 120 cc of contrast-medium using a power injector. Scan parameters were 140 kV and 100 mAs, using a thin collimation of 4 x 1 mm and a table speed of 7 mm (pitch: 1.75). Derived from thincollimation axial slices (slice thickness(eff) 1.25 mm, reconstruction increment 0.8 mm), a new image processing technique was deployed. Based on these source images, an automated 3D-segmentation of the lungs was performed followed by threshold based extraction of major airways and vascular structures. The filtered volume data were color encoded and finally overlayed ontothe original CT images. This color encoded display of parenchymal density distribution of the lungs was shown in axial, coronal and sagittal plane orientation. In four patients with excluded PE as well as in two patients with proven PE this new technique was performed. Results: In the four patientsthat were considered negative regarding PE on MSCT, lung densitometry showed a homogeneous distribution of color encoded densities without circumscribed decreased or increased areas, beside the usually present gravity-dependent gradient in ventro-dorsal direction. In the two patients with proven PE, low density values on perfusion weighted color maps were found distally to the occluded pulmonary arteries. Conclusions: Our initial experience indicates that lung densitometry with an optimized display of the density distribution within the lung parenchyma may provide additional information in patients with suspected or proven PE. However, a comparison with ventilation/perfusion scintigraphy and a larger number of patients are necessary for the full clinical evaluation of this new functional imaging methodology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 20:08:36