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

Motoo Nakagawa1, Yoshiyuki Ozawa2, Norikazu Nomura3

  • 1Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan. lmloltlolol@gmail.com.

Japanese Journal of Radiology
|January 13, 2018
PubMed

Insights

Contrast-enhanced CT scans are adequate for evaluating children after the Fontan operation. Both 60-second and 70-second delayed phases effectively assess intraconduit patency in congenital heart disease patients.

Area of Science:

  • Medical Imaging
  • Pediatric Cardiology
  • Radiology

Background:

  • Children with congenital heart diseases (CHDs) require post-Fontan operation follow-up.
  • Complications like conduit occlusion necessitate imaging surveillance.
  • Contrast-enhanced CT is a key tool for assessing these complications.

Purpose of the Study:

  • To develop an optimal contrast-enhanced CT protocol.
  • To evaluate the adequacy of delayed scanning phases for children post-Fontan operation.
  • To ensure accurate assessment of conduit patency.

Main Methods:

  • 29 dual-source CT examinations were performed on 26 pediatric patients (aged 2-11 years) post-Fontan operation.
  • Contrast medium was administered intravenously.
  • Scanning occurred at 60 or 70-second delayed phases to evaluate conduit enhancement.

Main Results:

  • Conduit enhancement showed similar CT numbers at both 60 and 70 seconds (185 ± 46 HU vs. 185 ± 31 HU).
  • Statistical analysis revealed no significant difference between the two delayed phases (P=0.97).
  • Both phases provided comparable visualization of the conduits.

Conclusions:

  • Both 60-second and 70-second delayed phases are suitable for contrast-enhanced CT.
  • These protocols adequately evaluate intraconduit patency in pediatric patients after the Fontan operation.
  • The findings support the use of either delayed phase for routine follow-up imaging.
Abstract

Keywords:
Computed tomographyCongenital heart diseaseFontan operation

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