0000000000010600
AUTHOR
Andrea Schenk
showing 9 related works from this author
Hepatic Hilar and Sectorial Vascular and Biliary Anatomy in Right Graft Adult Live Liver Donor Transplantation
2008
Abstract Introduction The aim of this study was to analyze vascular and biliary variants at the hilar and sectorial level in right graft adult living donor liver transplantation. Methods From January 2003 to June 2007, 139 consecutive live liver donors underwent three-dimensional computed tomography (3-D CT) reconstructions and virtual 3-D liver partitioning. We evaluated the portal (PV), arterial (HA), and biliary (BD) anatomy. Results The hilar and sectorial biliary/vascular anatomy was predominantly normal (70%–85% and 67%–78%, respectively). BD and HA showed an equal incidence (30%) of hilar anomalies. BD and PV had a nearly identical incidence of sectorial abnormalities (64.7% and 66.2…
Intrahepatic biliary anatomy derived from right graft adult live donor liver transplantation
2008
Abstract Objective The successful management of the bile duct in right graft adult live donor liver transplantation requires knowledge of both its central (hilar) and distal (sectorial) anatomy. The purpose of this study was to provide a systematic classification of its branching patterns to enhance clinical decision-making. Patients and Methods We analyzed three-dimensional computed tomography (3-D CT) imaging reconstructions of 139 potential live liver donors evaluated at our institution between January 2003 and June 2007. Results Fifty-four (n = 54 or 38.8%) donor candidates had a normal (classic) hilar and sectorial right bile duct anatomy (type I). Seventy-eight (n = 78 or 56.1%) cases…
A New Systematic Classification of Peripheral Anatomy of the Right Hepatic Duct: Experience From Adult Live Liver Donor Transplantation
2008
Abstract Objective The peripheral intrahepatic biliary anatomy, especially at the sectorial level on the right side, has not been adequately described. The purpose of our study was to systematically describe this complex anatomy in clinically applicable fashion. Patients and Methods We analyzed three-dimensional computed tomography (CT) imaging reconstructions of 139 potential living liver donors evaluated at our institution between January 2003 and June 2007. Results Eighty-nine (64%) donors had a normal right bile duct sectorial anatomy. In the other 50/139 (36%) cases, we observed abnormal sectorial branching patterns, with 45/50 abnormalities as trifurcations, whereas the remaining ones…
Anatomical Classification of the Peripheral Right Hepatic Duct: Early Identification of a Preventable Source of Morbidity and Mortality in Adult Live…
2008
Abstract Introduction The purpose of this study was to determine the impact of our classification on right graft adult live donor liver transplantation (ALDLT) outcomes. Methods Three-dimensional computed tomography (CT) reconstructions were used to classify the hilar and sectorial biliary anatomy of 71 consecutive live liver donors. Four possible clinical types were defined, based on the normal (N) or abnormal (A) features of the corresponding hilar/sectorial ducts: type I, N/N; type II, N/A; type III, A/N; and type IV, A/A. We subsequently performed an analysis of the operative outcomes based on the donor anatomy. Results Type I was encountered in 47.9% of cases, type II in 29.6%, type II…
“Anatomical” versus “Territorial” Belonging of the Middle Hepatic Vein: Virtual Imaging and Clinical Repercussions
2011
Background Venous drainage patterns are of vital importance in live donor liver transplantation. The purpose of this study was to delineate “anatomical-topographical” and “territorial-physiologic” patterns of the middle hepatic vein (MHV) in a 3-D liver model as determined by the Pringle line and its drainage volume of the right and left hemilivers. Methods One hundred thirty-seven consecutive live donor candidates were evaluated by 3-D CT reconstructions and virtual hepatectomies. Based on right (R) and left (L), anatomical (A) and territorial (T) belonging patterns of the MHV, each individual was assigned to one of four possible types: type I:AR–TR; type II:AL–TL; type III:AR–TL; type IV:…
Segmentierung von Hepatozellulären Karzinomen mit Fuzzy-Connectedness
2003
Die Segmentierung von hepatozellularen Karzinomen nach Chemoembolisation stellt eine grose Herausforderung an die Bildverarbeitung dar. CT-Aufnahmen sechs Wochen nach dieser Therapie sind die Grundlage fur die angestrebte Volumetrie der Raumforderungen. In diesen Bildern stellen sich die mit Lipiodol und Mitomycin behandelten Tumore als inhomogene, kraftig kontrastierte Herde dar, wahrend gleichzeitig neue Metastasen mit nur geringer Kontrastierung entstanden sein konnen. Ein neuer, auf Basis der Fuzzy-Connectedness beruhender Algorithmus zeigt in einer ersten Studie durch seine Fahigkeit, Grauwertinformationen mit Kriterien zu lokalen Zusammenhangen zu kombinieren, gute Ergebnisse. Verglei…
Evaluation eines neuen Softwareassistenten zur automatischen Volumenbestimmung von intrahepatischen Tumoren
2004
Purpose: Computed tomography has become the preferred method in detecting liver carcinomas. The introduction of spiral CT added volumetric assessment of intrahepatic tumors, which was unattainable in the clinical routine with incremental CT due to complex planimetric revisions and excessive computing time. In an ongoing clinical study, a new software tool was tested for the automatic detection of tumor volume and the time needed for this procedure. Materials and Methods: We analyzed patients suffering from hepatocellular carcinoma (HCC). All patients underwent treatment with repeated transcatheter chemoembolization of the hepatic arteria. The volumes of the HCC lesions detected in CT were m…
Liver "Compliance": A previously unrecognized preoperative predictor of small-for-size syndrome in adult living donor liver transplantation
2008
The purpose of this study was to investigate the effect of liver compliance on computed tomography (CT) volumetry and to determine its association with postoperative small-for-size syndrome (SFSS).Unenhanced, arterial, and venous phase CT images of 83 consecutive living liver donors who underwent graft hepatectomy for adult-to-adult living donor liver transplantation (ALDLT) were prospectively subjected to three-dimensional (3-D) CT liver volume calculations and virtual 3-D liver partitioning. Graft volume estimates based on 3-D volumetry, which subtracted intrahepatic vascular volume from the "smallest" (native) unenhanced and the "largest" (venous) CT phases, were subsequently compared wi…
Donor/recipient algorithm for management of the middle hepatic vein in right graft live donor liver transplantation
2010
Abstract Background The aim of this study was to delineate an algorithm for donor and recipient criteria and middle hepatic vein (MHV) management in right-graft live-donor liver transplantation (LDLT) on the basis of computerized 3-dimensional computed tomographic image analysis. Methods Data on 94 consecutive right-graft LDLTs were prospectively collected. Graft and remnant data for the first 23 cases were retrospectively evaluated by means of 3-dimensional computed tomographic reconstructions, and on the basis of that preliminary series, a graft selection algorithm using 3 parameters—hepatic vein dominance classification, graft and remnant graft volume/body weight ratios, and congestion v…