Artifacts in spiral CT protocols

dc.contributor.author	Λαβδάς, Ελευθέριος	el
dc.contributor.author	Βλυχού, Μαριάννα	el
dc.contributor.author	Ροκά, Βιολέτα	el
dc.contributor.author	Βόζνιακ, Γκρέτα	el
dc.contributor.author	Πρωτόγερου, Γεωργία	el
dc.date.accessioned	2015-01-16T21:44:54Z
dc.date.available	2015-01-16T21:44:54Z
dc.date.issued	2015-01-16
dc.identifier.uri	http://hdl.handle.net/11400/4145
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.elsevier.com/	en
dc.subject	Τα παράσιτα κίνησης
dc.subject	Τμηματικός
dc.subject	Αποκατάσταση
dc.subject	Motion artifacts
dc.subject	Segmental
dc.subject	Ρeconstruction
dc.title	Artifacts in spiral CT protocols	en
heal.type	journalArticle
heal.secondaryTitle	the importance of the spatial reconstruction	en
heal.classification	Medicine
heal.classification	Radiology, Medical
heal.classification	Ιατρική
heal.classification	Ακτινολογία, Ιατρική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85110777
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Ακτινολογία, Ιατρική
heal.contributorName	Φεζουλίδης, Ιωάννης Β.	el
heal.identifier.secondary	DOI:10.1016/j.ejradi.2009.09.004
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας.Σχολή Επαγγελμάτων Υγείας και Πρόνοιας.Τμήμα Ραδιολογίας και Ακτινολογίας.	el
heal.publicationDate	2009-06
heal.bibliographicCitation	Lavdas, E., Vlychou, M., Roka, V., Wozniak, G., Protogerou, G., et al. (2009). Artifacts in spiral CT protocols: the importance of the spatial reconstruction." European Journal of Radiography". 1 (2). p.73-79.	en
heal.abstract	Purpose This study recorded and analysed streak and motion artifacts in spiral CT examinations and evaluated the elimination and minimization of them by the use of segmental reconstruction with and without alterations of the initial examination protocol. Materials and methods One hundred CT scans of the chest and 300 CT scans of the brain have been included in this study. All studies were performed by a helical CT scanner (Philips 5000 SR) with the standard protocol and were randomly selected due to the presence of either streak or motion artifacts. Segmental reconstruction was applied in all cases by the same experienced radiographer. Image evaluation was performed by two experienced radiologists using a scoring system for each artifact and a grading system for classifying post-processing images. Results Among series of images that were evaluated after the application of segmental reconstruction, brain examinations demonstrated the following results: 10.9% of the cases showed no artifact improvement, 19.6% showed slight artifact improvement 31.5% showed moderate improvement and 38% showed significant improvement. The results of chest examinations were as follows: 27% of the cases showed no artifact improvement, 23% showed slight artifact improvement, 26% showed moderate improvement and 24% of showed significant improvement. Spatial reconstruction was useless in brain CT images when a patient moved during the entire scan and in chest CT images when streak and motion artifacts co-existed. Conclusions Spatial reconstruction may improve the image quality in brain and chest CT examinations and thus may contribute to more diagnostic images. Elimination of motion artifacts is also suggested due to the limitation of intravenous contrast medium that can be administered per patient per day and in cases of non-cooperative patients.	en
heal.publisher	Elsevier Science Ltd	en
heal.journalName	European Journal of Radiography	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true