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- W2018404547 abstract "Purpose: The purpose of this work was to assess the scan delay and the effect of flow rates on arterial phase scanning of hepatic CT. Method: One hundred twenty patients suspected of having hepatocellular carcinoma were examined by three-phase helical CT using computer-assisted bolus-tracking technology. We set the region of interest (ROI) in the abdominal aorta at the level of the celiac artery as a baseline. The triggering threshold was set at 100 HU. A volume of 100 ml of iomeprol (350 mg of I/ml) was administered at 2, 2.5, or 3 ml/s i.v. Results: In all cases, helical CT scanning began after reaching the ROI threshold. Then, portal venous phase scanning was initiated 50 s after arterial phase initiation. The mean delay time from the initiation of contrast agent administration to the beginning of arterial phase scanning was 29.2 ± 3.8 s (mean ± SD, range 22–39 s). A faster injection rate significantly shortened the scan delay (p < 0.01). In portal venous phase scanning, calculated areas under the hepatic enhancement curves were almost equal among different injection rates. Conclusion: The computer-assisted bolus-tracking technology is a useful method for determining an individual scan delay of arterial phase CT." @default.
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- W2018404547 date "2000-03-01" @default.
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- W2018404547 title "Helical CT of the Liver with Computer-Assisted Bolus-Tracking Technology: Scan Delay of Arterial Phase Scanning and Effect of Flow Rates" @default.
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- W2018404547 doi "https://doi.org/10.1097/00004728-200003000-00006" @default.
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