Optimal delay time for the hepatic parenchymal enhancement at the multidetector CT examination

Journal of Computer Assisted Tomography
Yong Eun ChungMyeong-Jin Kim

Abstract

The objective of this study was to determine the optimal scan delay time after hepatic parenchymal enhancement using a 16-channel multidetector row helical CT (MDCT) scanner. Two hundred fifty-five consecutive patients underwent biphasic CT scans using a 16-channel MDCT. In group A (n = 125), two hepatic venous phase scans (HVP1 and HVP2) were obtained at 40 and 60 seconds, after 100-HU threshold time (T100HU) in the abdominal aorta. In group B (n = 130), HVP1 and HVP2 scans were obtained 50 and 70 seconds after T100HU. Both groups were divided into subgroups that were given different contrast media. Groups A1 and B1 received a contrast medium of 300 mgI/mL; groups A2 and B2 received a contrast medium of 370 mgI/mL. Each patient was injected with contrast medium at a dose of 2 mL/kg at a rate adjusted to the patient's body weight with a constant injection duration of 47 seconds. The attenuation values (HU) for the liver, portal vein, hepatic vein, and aorta were measured. The average HU was compared between the groups. Hepatic enhancement in the images obtained at 50 and 60 seconds after T100HU was greater (P < 0.05) than in images obtained at 40 and 70 seconds. These results were obtained with both contrast media. A few patien...Continue Reading

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Citations

Jul 14, 2009·Abdominal Imaging·Patrick Veit-HaibachThomas F Hany
Feb 14, 2008·European Radiology·Christos LoupatatzisHarald Marcel Bonel
Aug 17, 2010·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Bernhard SattlerEmmanuel Coche
Apr 7, 2009·Journal of Computer Assisted Tomography·Giulia A ZamboniVassilios D Raptopoulos

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