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논문 기본 정보

자료유형
학술저널
저자정보
이기열 (고려대학교 의과대학 진단방사선과)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제35권 제4호
발행연도
1996.1
수록면
531 - 536 (6page)

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Purpose : To determine the degree and effect of contrast enhancement of the hepatic parenchyma according todifferent injection rates, amounts and types of contrast materials. Materials and Methods : A total of 270patients were divided into nine groups. Each group received different volumes(120, 130, or 140ml) and was scannedwith different injection rates of 2, 3 or 4 ml/sec. Three kinds of contrast materials(Ultravist 370, Iopamiro 370,Optiray 320) were used. Hepatic enhancement was measured by comparing quantitative regions of interest(ROI) beforeand after bolus injection of contrast material which were evaluated on arterial, portal and delayed phase duringdouble spiral scanning. Results : There was no significant statistical difference in contrast enhancement betweenthe three kinds of contrast materials. In noncirrhotic patients, hepatic enhancement was greatest on portal phaseand was greater at a rate of 4ml/sec than 2ml/sec or 3ml/sec on arterial phase. At the same injection rate, thevolume of contrast material was an important factor on portal and delayed phase. In the cirrhotic patients,Child's C showed more delayed peak enhancement than did Child's A. Conclusion : The important factors in contrastenhancement were injection rate on arterial phase and volume on portal and delayed phase. The optimal choice mustbe made after considering intrinsic variables ; in addition, our results are helpful for determining enhancementprotocol during double spiral CT scanning.

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