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11.01.2018 | Original Article | Ausgabe 3/2018

Japanese Journal of Radiology 3/2018

Investigation of an appropriate contrast-enhanced CT protocol for young patients following the Fontan operation

Zeitschrift:
Japanese Journal of Radiology > Ausgabe 3/2018
Autoren:
Motoo Nakagawa, Yoshiyuki Ozawa, Norikazu Nomura, Sachiko Inukai, Ayano Shiba, Keita Sakurai, Masashi Shimohira, Yuta Shibamoto

Abstract

Purpose

Children with congenital heart diseases (CHDs) may need to be followed up with contrast-enhanced CT following the Fontan operation because complications such as the occlusion of conduits may occur. The purpose of the present study was to develop an adequate contrast-enhanced CT protocol for children with CHD following the Fontan operation.

Materials and methods

Between July 2012 and July 2017, 29 CT examinations for 26 patients aged 2–11 years (median 5 years) with CHD following the Fontan operation were performed using dual-source CT. A non-ionized contrast medium was injected through the dorsum manus vein. Scanning began 60 or 70 s after the start of the injection. The delayed phase was randomly selected to be 60 s in 14 cases and 70 s in 15 cases. We evaluated the enhancement of conduits following the Fontan operation at delayed phases.

Results

The CT numbers of conduits at 60 and 70 s were 185 ± 46 and 185 ± 31 HU, respectively (P = 0.97).

Conclusion

In contrast-enhanced CT for children after the Fontan operation, both of the delayed phases (60 and 70 s) appeared to be adequate for evaluating intraconduit patency.

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