Split-bolus injection protocol with optimized timings of contrast medium injection and CT scanning for 3D CT angio-venography before laparoscopic gastrectomy.

Japanese Journal of Radiology
Koji MurogaNobumaro Ihara

Abstract

To propose an optimization method of contrast medium injection for the split-bolus protocol based on the contrast medium pharmacokinetics and investigate the utility of the optimized split-bolus protocol in 3D CT angio-venography for laparoscopic gastrectomy. A pharmacokinetic relationship between injection duration and time to the peak enhancement was taken into account in the protocol design. The first 20 consecutive patients underwent a multi-phase scan with a single-bolus injection (single-bolus protocol), and the next 20 underwent the proposed split-bolus protocol. CT attenuations of the arteries and veins and dose-length products (DLPs) were compared between the two protocols. Two radiologists visually assessed arterial and venous depictions and the misregistrations. Mean arterial CT attenuations were not significantly different between the two protocols. Though mean venous CT attenuations for the split-bolus protocol were 7-11% lower than those of the single-bolus protocol, they were visually evaluated as similar. The mean DLP of the split-bolus protocol was 46% lower than that of the single-bolus protocol. Misregistration between the arteries and veins occurred 35-80% during the single-bolus protocol, but was not indica...Continue Reading

References

Jun 23, 2004·AJR. American Journal of Roentgenology·Mitsuru MatsukiNobuhiko Tanigawa
Sep 23, 2006·Radiology·Satoshi GoshimaKyongtae T Bae
Jul 25, 2007·AJR. American Journal of Roentgenology·Lawrence C ChowGraham Sommer
Jun 29, 2011·European Journal of Radiology·Tomoaki IchikawaTsutomu Araki

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