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American Journal of Roentgenology, Vol 173, 1219-1224, Copyright © 1999 by American Roentgen Ray Society
ARTICLES |
K Takayasu, Y Muramatsu, S Asai, Y Muramatsu and T Kobayashi
Department of Diagnostic Radiology, National Cancer Center Hospital, Tokyo, Japan.
OBJECTIVE: We assessed the usefulness of real-time CT fluoroscopy for needle guidance and evaluated the clinical usefulness of a unified CT fluoroscopy and angiography system in the treatment of hepatocellular carcinoma. SUBJECTS AND METHODS: A single-session percutaneous ethanol injection was performed with CT fluoroscopy guidance and monitoring for 15 hepatocellular carcinomas with an average size of 2.5 cm (range, 0.7- 4.7 cm) in 10 consecutive patients. Of these, seven lesions were not seen on sonography. To mark the lesion for puncture, we performed CT arteriography or arterial injection of iodized oil. A puncture guide was applied to 12 lesions. RESULTS: The average depth from the skin's surface to the lesion was 9.3 cm (range, 4.5-11.5 cm), and the puncture route was transthoracic in five lesions and transabdominal in 13. The overall success rate in puncturing the lesions was 94.4% (17/18 sessions). The average number of punctures was 3.3, and it significantly decreased after introduction of a puncture guide compared with freehand puncture (p < .01). The average amount of injected ethanol was 12.7 ml (range, 4-27 ml). The ratio of injected ethanol dose to calculated ethanol dose was 0.6. Local recurrence occurred in four (26.7%) of 15 lesions after an average of 5 months. CONCLUSION: Using CT fluoroscopy for guidance of the needle and for monitoring ethanol infusion in the target lesion, we have found single-session percutaneous ethanol injection to be possible for hepatocellular carcinomas smaller than 5 cm or not revealed by sonography. The puncture guidance equipment was helpful for accurate insertion of the needle into the lesion, allowing a minimum number of punctures and minimal radiation exposure.
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