V M Bonaldi1, P M Bret, C Reinhold, M Atri. 1. Department of Diagnostic Radiology, Montreal General Hospital, McGill University, Quebec, Canada.
Abstract
PURPOSE: To prospectively evaluate a dual-phase helical acquisition in computed tomography (CT) of the liver. MATERIALS AND METHODS: Two helical CT acquisitions were performed in 103 patients: hepatic arterial phase (HAP) 15 seconds after injection of 2 mL/kg contrast material at a rate of 6 mL/sec and the portal venous phase (PVP) 90 seconds after injection. Detection of focal liver lesions, vascular anatomic features, and perfusion abnormalities were assessed by two reviewers. Liver enhancement was also calculated on every section. RESULTS: Of 119 detected focal liver lesions, nine were seen during HAP only and 40 during PVP only. According to a 0-3 score, visualization of the arterial anatomic landmarks was better during HAP (P < .0001). Five right replaced and two left replaced hepatic arteries were visualized only during HAP. Parenchymal perfusion abnormalities were found in 32 patients duringHAP and in four patients during PVP. CONCLUSION: A dual-phase acquisition depicted 8% additional focal liver lesions and outlined the entire vasculature of the liver.
RCT Entities:
PURPOSE: To prospectively evaluate a dual-phase helical acquisition in computed tomography (CT) of the liver. MATERIALS AND METHODS: Two helical CT acquisitions were performed in 103 patients: hepatic arterial phase (HAP) 15 seconds after injection of 2 mL/kg contrast material at a rate of 6 mL/sec and the portal venous phase (PVP) 90 seconds after injection. Detection of focal liver lesions, vascular anatomic features, and perfusion abnormalities were assessed by two reviewers. Liver enhancement was also calculated on every section. RESULTS: Of 119 detected focal liver lesions, nine were seen during HAP only and 40 during PVP only. According to a 0-3 score, visualization of the arterial anatomic landmarks was better during HAP (P < .0001). Five right replaced and two left replaced hepatic arteries were visualized only during HAP. Parenchymal perfusion abnormalities were found in 32 patients during HAP and in four patients during PVP. CONCLUSION: A dual-phase acquisition depicted 8% additional focal liver lesions and outlined the entire vasculature of the liver.
Authors: L Schwartz; L Brody; K Brown; A Covey; S Tuorto; M Mazumdar; E Riedel; W Jarnagin; G Getrajdman; Y Fong Journal: World J Surg Date: 2006-10 Impact factor: 3.352
Authors: Renate Hammerstingl; Alexander Huppertz; Josy Breuer; Thomas Balzer; Anthony Blakeborough; Rick Carter; Lluis Castells Fusté; Gertraud Heinz-Peer; Werner Judmaier; Michael Laniado; Riccardo M Manfredi; Didier G Mathieu; Dieter Müller; Koenraad Mortelè; Peter Reimer; Maximilian F Reiser; Philip J Robinson; Kohkan Shamsi; Michael Strotzer; Matthias Taupitz; Bernd Tombach; Gianluca Valeri; Bernhard E van Beers; Thomas J Vogl Journal: Eur Radiol Date: 2007-12-06 Impact factor: 5.315