Degradation of the z- resolution due to a longitudinal motion with a 64-channel CT scanner.
Fiche publication
Date publication
janvier 2007
Journal
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
Auteurs
Membres identifiés du Cancéropôle Est :
Pr FELBLINGER Jacques, Pr HUBERT Jacques
Tous les auteurs :
Grosjean R, Sauer B, Guerra RM, Blum A, Felblinger J, Hubert J
Lien Pubmed
Résumé
Isotropic acquisitions are routinely achievable with 64- channel CT scanners,. As it predecessors, it includes MultiPlanar Reformation (MPR) projection for the reconstruction of two-dimensional images and volume rendering for the creation of three dimensional images. The accuracy of images obtained with these postprocessing methods depends on the spatial resolution of image data acquired along the long axis of the patient (ie longitudinal, or z-inis spatial resolution). But physiologic motions can appear during a Computed Tomography (CT) exam and can leacd to a degradation of this spatial resolution. By using two different phantoms and a dynamic platform, we have studied the influence of a z-axis linear motion on the MPR images quality. Our results show that the corruption of the data results in the loss of information about the form, the contrast and/or the size of the scanned object. This corruption of data can lead to diagnostic errors by mimicking diseases or by masking physiologic details.
Mots clés
Diagnostic Errors, prevention & control, Imaging, Three-Dimensional, methods, Motion, Movement, Tomography, X-Ray Computed, methods
Référence
Conf Proc IEEE Eng Med Biol Soc. 2007 ;2007:4429-32