Successful Implementation of a Radiation Dose Reduction Strategy for CT Protocols in a Neuroradiology Section

Détails

ID Serval
serval:BIB_96CA85B9A466
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Sous-type
Poster: résume de manière illustrée et sur une page unique les résultats d'un projet de recherche. Les résumés de poster doivent être entrés sous "Abstract" et non "Poster".
Collection
Publications
Titre
Successful Implementation of a Radiation Dose Reduction Strategy for CT Protocols in a Neuroradiology Section
Titre de la conférence
RSNA 2007, Radiological Society of North America, 93rd Scientific Assembly and Annual Meeting
Auteur⸱e⸱s
Smith A.B., Dillon W.P., Lau B., Gould R.G., Verdun F., Wintermark M.
Adresse
Chicago, Illinois, November 25-30, 2007
Statut éditorial
Publié
Date de publication
2007
Langue
anglais
Résumé
PURPOSE: To quantify the impact of systematic use of tube current modulation for neuroradiology CT protocols in terms of patient dose reduction and image quality.
METHOD AND MATERIALS: As part of a retrospective study, approved by our institutional review board and in compliance with Health Insurance Portability and Accountability Act (HIPAA), we evaluated the impact of dose modulation on 4 types of neuroradiological CT studies: brain noncontrast CT (NCT) in adult patients, brain NCT in pediatric patients, adult cervical spine CT, and adult cervical and intracranial CT-angiogram (CTA). For each type of CT study, three series of 100 consecutive studies were reviewed: (1) 100 studies without dose-modulation; (2) 100 studies with Z-axis dose-modulation; (3) 100 studies with XYZ-axis dose-modulation. For each examination, the weighted computed dose tomographic index (CTDIvol) and dose length product (DLP) were recorded, and noise was measured. Each examination was reviewed by a neuroradiologist blinded to the dose modulation mode for image quality. Continuous variables (CTDIvol, DLP, noise) were compared using T-tests, and categorical variables (image quality) using Chi2 tests.
RESULTS: For adult brain NCT, CTDIvol and DLP were reduced by 60.0% and 60.3%, respectively, using Z-axis dose-modulation; and by 50.4% and 22.4%, respectively, using XYZ-axis dose-modulation. Significant dose reductions were also observed for pediatric brain NCT, cervical spine CT and CTAs. Image quality and noise were unaffected by use of dose modulation.
CONCLUSION: Dose-modulation techniques should be systematically used for neuroradiology CT examinations, because they afford significant dose reduction, while image quality is maintained.
CLINICAL RELEVANCE/APPLICATION: Utilization of dose modulation techniques results in significant reduction in radiation dose to patients for studies typically utilized in a neuroradiology department without loss of image quality.
Création de la notice
06/01/2009 18:23
Dernière modification de la notice
20/08/2019 15:58
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