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M Levesque - One of the best experts on this subject based on the ideXlab platform.
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Focal hepatic masses: comparison of detection during arterial Portography with MR imaging and CT.
Radiology, 1994Co-Authors: Philippe Soyer, Jean-pierre Laissy, A Sibert, F Blanc, Jacques Belghiti, J P Marmuse, G Zeitoun, M Levesque, Yves MenuAbstract:PURPOSE: A prospective study was performed to compare the sensitivity and specificity of magnetic resonance (MR) imaging and computed tomography (CT) both performed during arterial Portography in depicting focal hepatic masses. MATERIALS AND METHODS: Eleven patients with 31 pathologically proved focal hepatic masses were prospectively evaluated. MR arterial Portography was performed with 4 mL of a 0.5 mmol/kg solution of gadolinium tetraazacyclododecanetetraacetic acid (DOTA) injected through a catheter into the superior mesenteric artery during multisection gradient-echo imaging. RESULTS: MR arterial Portography depicted 29 of the 31 masses (sensitivity, 94%). CT arterial Portography depicted 27 of the 31 masses (sensitivity, 87%). Two masses not depicted with either CT or MR had a diameter of 3 and 7 mm, respectively. Neither MR nor CT demonstrated a false-positive finding (specificity, 100%). The difference in sensitivity and specificity between the two techniques was not statistically significant. CON...
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Detection of recurrent hepatic metastases after partial hepatectomy: value of CT combined with arterial Portography.
AJR. American journal of roentgenology, 1994Co-Authors: Philippe Soyer, J P Marmuse, G Zeitoun, David A. Bluemke, M LevesqueAbstract:We did a retrospective study to evaluate the sensitivity of CT combined with arterial Portography in detecting recurrent hepatic metastases after partial hepatectomy.CT scans combined with arterial Portography in 18 patients who had partial hepatectomy and suspected intrahepatic recurrence of metastases were retrospectively reviewed. Eleven of the patients had further surgery, and recurrent hepatic metastases were proved; seven patients were inoperable. The sensitivity of CT with arterial Portography for detecting recurrent intrahepatic metastases was determined and correlated with intraoperative findings and findings on follow-up imaging studies in the 11 patients (with a total of 23 hepatic metastases) who had further surgery.Not one of the 18 CT examinations combined with arterial Portography was compromised by inhomogeneous perfusion of contrast material in the portal vein. Of the 23 metastases that were found in the 11 patients who had further surgery, 21 (91%) were shown on CT with arterial portogra...
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False-positive CT Portography: correlation with pathologic findings.
AJR. American journal of roentgenology, 1993Co-Authors: Philippe Soyer, D Lacheheb, M LevesqueAbstract:A retrospective study was performed to determine the causes of false-positive diagnoses based on CT findings obtained during superior mesenteric arterial Portography (CT Portography) and to correlate the imaging characteristics of the incorrectly diagnosed lesions with their pathologic findings.In a series of 52 patients who had CT Portography before surgical exploration of the liver, eight had a total of 10 false-positive findings, yielding a false-positive diagnosis rate of 15%. In eight cases, the false-positive findings from CT Portography were correlated with the histologic material obtained during partial hepatic resection or intraoperative biopsies at the corresponding sites.Of the 10 false-positive findings on CT portograms, seven led to false-positive diagnoses of hepatic tumors. Conversely, three nontumorous false-positive findings were erroneously considered to be portal perfusion defects. The final diagnoses based on pathologic findings included focal fatty infiltration of the liver (three), c...
Philippe Soyer - One of the best experts on this subject based on the ideXlab platform.
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Focal hepatic masses: comparison of detection during arterial Portography with MR imaging and CT.
Radiology, 1994Co-Authors: Philippe Soyer, Jean-pierre Laissy, A Sibert, F Blanc, Jacques Belghiti, J P Marmuse, G Zeitoun, M Levesque, Yves MenuAbstract:PURPOSE: A prospective study was performed to compare the sensitivity and specificity of magnetic resonance (MR) imaging and computed tomography (CT) both performed during arterial Portography in depicting focal hepatic masses. MATERIALS AND METHODS: Eleven patients with 31 pathologically proved focal hepatic masses were prospectively evaluated. MR arterial Portography was performed with 4 mL of a 0.5 mmol/kg solution of gadolinium tetraazacyclododecanetetraacetic acid (DOTA) injected through a catheter into the superior mesenteric artery during multisection gradient-echo imaging. RESULTS: MR arterial Portography depicted 29 of the 31 masses (sensitivity, 94%). CT arterial Portography depicted 27 of the 31 masses (sensitivity, 87%). Two masses not depicted with either CT or MR had a diameter of 3 and 7 mm, respectively. Neither MR nor CT demonstrated a false-positive finding (specificity, 100%). The difference in sensitivity and specificity between the two techniques was not statistically significant. CON...
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Detection of recurrent hepatic metastases after partial hepatectomy: value of CT combined with arterial Portography.
AJR. American journal of roentgenology, 1994Co-Authors: Philippe Soyer, J P Marmuse, G Zeitoun, David A. Bluemke, M LevesqueAbstract:We did a retrospective study to evaluate the sensitivity of CT combined with arterial Portography in detecting recurrent hepatic metastases after partial hepatectomy.CT scans combined with arterial Portography in 18 patients who had partial hepatectomy and suspected intrahepatic recurrence of metastases were retrospectively reviewed. Eleven of the patients had further surgery, and recurrent hepatic metastases were proved; seven patients were inoperable. The sensitivity of CT with arterial Portography for detecting recurrent intrahepatic metastases was determined and correlated with intraoperative findings and findings on follow-up imaging studies in the 11 patients (with a total of 23 hepatic metastases) who had further surgery.Not one of the 18 CT examinations combined with arterial Portography was compromised by inhomogeneous perfusion of contrast material in the portal vein. Of the 23 metastases that were found in the 11 patients who had further surgery, 21 (91%) were shown on CT with arterial portogra...
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False-positive CT Portography: correlation with pathologic findings.
AJR. American journal of roentgenology, 1993Co-Authors: Philippe Soyer, D Lacheheb, M LevesqueAbstract:A retrospective study was performed to determine the causes of false-positive diagnoses based on CT findings obtained during superior mesenteric arterial Portography (CT Portography) and to correlate the imaging characteristics of the incorrectly diagnosed lesions with their pathologic findings.In a series of 52 patients who had CT Portography before surgical exploration of the liver, eight had a total of 10 false-positive findings, yielding a false-positive diagnosis rate of 15%. In eight cases, the false-positive findings from CT Portography were correlated with the histologic material obtained during partial hepatic resection or intraoperative biopsies at the corresponding sites.Of the 10 false-positive findings on CT portograms, seven led to false-positive diagnoses of hepatic tumors. Conversely, three nontumorous false-positive findings were erroneously considered to be portal perfusion defects. The final diagnoses based on pathologic findings included focal fatty infiltration of the liver (three), c...
Goro Kajiyama - One of the best experts on this subject based on the ideXlab platform.
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Three-Dimensional Portography Using Multislice Helical CT Is Clinically Useful for Management of Gastric Fundic Varices
AJR. American journal of roentgenology, 2001Co-Authors: Akiko Matsumoto, Mikiya Kitamoto, Michio Imamura, Toshio Nakanishi, Chiaki Ono, Katsuhide Ito, Goro KajiyamaAbstract:OBJECTIVE. This study seeks to evaluate three-dimensional (3D) helical CT Portography as a tool for examining patients with gastric fundic varices.SUBJECTS AND METHODS. We compared 3D helical CT Portography and conventional angiographic Portography in 30 consecutive patients with gastric fundic varices. We assessed whether 3D helical CT Portography is useful in selecting patients and in evaluating the results of balloon-occluded retrograde transvenous obliteration.RESULTS. Three-dimensional helical CT Portography simultaneously depicted second or third branches of the intrahepatic portal vein and provided images of entire portosystemic collaterals. On 3D helical CT Portography, gastric fundic varices were seen in 30 patients (100%), left gastric veins in 19 (63%), posterior gastric veins or short gastric veins in 28 (93%), gastrorenal shunts in 27 (90%), paraumbilical veins in three (10%), and inferior phrenic veins in two patients (7%). Findings of 3D helical CT Portography and conventional angiographic ...
M. E. Bernardino - One of the best experts on this subject based on the ideXlab platform.
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Preoperative determination of the resectability of hepatic tumors: efficacy of CT during arterial Portography.
AJR. American journal of roentgenology, 1993Co-Authors: William Small, W. B. Mehard, L. S. Langmo, A. P. Dagher, Elliot K. Fishman, J. P. Heiken, M. E. BernardinoAbstract:A multiinstitutional study was performed to evaluate the efficacy of CT during arterial Portography for determining the resectability of hepatic tumors. The impact of findings from CT during arterial Portography on patients' treatment (i.e., surgical vs nonsurgical) was assessed. In patients considered to have resectable tumors, the accuracy of CT during arterial Portography for predicting surgical findings was also evaluated.A retrospective study was done of 404 patients from three institutions who had CT during arterial Portography during the period 1985-1991 as part of preoperative staging to determine the resectability of hepatic tumors. The tumors included metastases from colorectal carcinoma in 197 patients (49%); other hepatic metastases, mostly from adenocarcinoma of the stomach, pancreas, and biliary tree in 123 (30%); and primary hepatocellular carcinoma in 84 (21%). Imaging results were correlated with results of percutaneous biopsy of at least one hepatic lesion in patients whose tumors were c...
Martijn R. Meijerink - One of the best experts on this subject based on the ideXlab platform.
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Transcatheter CT Arterial Portography and CT Hepatic Arteriography for Liver Tumor Visualization during Percutaneous Ablation
Journal of vascular and interventional radiology : JVIR, 2014Co-Authors: Aukje A. J. M. Van Tilborg, Hester J. Scheffer, Karin Nielsen, Jan Hein T.m. Van Waesberghe, Emile F. I. Comans, C. Van Kuijk, Petrousjka Van Den Tol, Martijn R. MeijerinkAbstract:Abstract Purpose To evaluate the feasibility of combining transcatheter computed tomography (CT) arterial Portography or transcatheter CT hepatic arteriography with percutaneous liver ablation for optimized and repeated tumor exposure. Materials and Methods Study participants were 20 patients (13 men and 7 women; mean age, 59.4 y; range, 40–76 y) with unresectable liver-only malignancies—14 with colorectal liver metastases (29 lesions), 5 with hepatocellular carcinoma (7 lesions), and 1 with intrahepatic cholangiocarcinoma (2 lesions)—that were obscure on nonenhanced CT. A catheter was placed within the superior mesenteric artery (CT arterial Portography) or in the hepatic artery (CT hepatic arteriography). CT arterial Portography or CT hepatic arteriography was repeatedly performed after injecting 30–60 mL 1:2 diluted contrast material to plan, guide, and evaluate ablation. The operator confidence levels and the liver-to-lesion attenuation differences were assessed as well as needle-to-target mismatch distance, technical success, and technique effectiveness after 3 months. Results Technical success rate was 100%; there were no major complications. Compared with conventional unenhanced CT, operator confidence increased significantly for CT arterial Portography or CT hepatic arteriography cases ( P P Conclusions In patients with technically unresectable liver-only malignancies, single-session CT arterial Portography–guided or CT hepatic arteriography–guided percutaneous tumor ablation enables repeated contrast-enhanced imaging and real-time contrast-enhanced CT fluoroscopy and improves lesion conspicuity.