Poster électronique

La technique de "dual-phase cone-beam CT" pour l'évaluation des caractéristiques tumorales durant les procédures de chimioembolisation intra-artérielle hépatique : expérience initiale
R. Loffroy (1), M. De Lin (2), P. Rao (2), S. Ota (2), J. Blijd (2), JF. Geschwind (2) - (1) Dijon - France, (2) Baltimore - Etats-Unis
Congrès 2010
Résumé
Objectifs
La technique de «c-arm cone-beam computed tomography (CBCT)» peut être utilisée pour visualiser à la fois les vaisseaux artériels nourriciers et le réhaussement parenchymateux des tumeurs hépatiques pendant les procédures de chimioembolisation intra-artérielle. Pour capturer ces deux phases, tous les systèmes commercialement disponibles aujourd'hui nécessitent la réalisation séparée de 2 scanners avec une injection d'iode pour chacun. Nous reportons ici les résultats initiaux de l'utilisation d'un nouveau système « dual-phase cone-beam CT (DPCBCT)» qui fournit ces 2 phases en utilisant une seule injection de contraste.
Matériels et méthodes
La technique “dual-phase” a été utilisée pour acquérir 2 scanners “cone-beam” utilisant une seule injection intra-artérielle de contraste. Pour illustrer la faisabilité de cette technique, 3 cas représentatifs parmi les 30 premiers patients traités ont été sélectionnés. Pour chaque cas, les images « DPCBCT »étaient comparées à l'imagerie diagnostique pré-intervention (IRM ou TDM) et analysées pendant la procédure. Un modèle animal (porc) a aussi été utilisé dans cette étude pour réaliser une dosimétrie de l'irradiation.
Résultats
La faisabilité de la technique « dual-phase » est excellente pendant les procédures de chimioembolisation et les résultats préliminaires montrent une bonne corrélation avec l'imagerie conventionnelle pré-intervention (TDM ou IRM). D'autre part, le degré d'embolisation peut être monitoré. Les mesures de dosimétrie montrent que la dose effective liée à l'utilisation de cette technique est significativement plus basse que celle d'un scanner diagnostique.
Conclusion
La technique « DPCBCT » est une technologie prometteuse qui permet une visualisation à la fois des vaisseaux artériels nourriciers et du réhaussement parenchymateux des tumeurs hépatiques en utilisant une seule injection d'iode. Cette technique peut être utilisée en routine pendant les procédures de chimioembolisation pour vérifier la bonne position du cathéter et monitorer l'effet de l'embolisation.
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2017-12-11 04.16 :
wty123

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2010-10-26 16.18 :
c brunier

bien mais il est inadmissible de presenter un poster en anglais dans un congres francais, de surcroit lorsque les auteurs sont francophones...
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38
Le poster a été trop consulté dans un laps de temps très court.
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