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[Optimal scan timing for Gd-EOB-DTPA enhanced liver dynamic MR imaging]
Satoru Akimoto1, Hiroshige Mori, Tomonori Fujii
1Department of Radiology, Hokkaido Social Insurance Hospital, Japan.
Nihon Hoshasen Gijutsu Gakkai Zasshi
|June 6, 2009
Summary
Optimal timing for Gadoxetate Sodium (Gd-EOB-DTPA) MRI is crucial. Arterial phase imaging should be around 25 seconds post-injection, while the highest liver-to-spleen contrast is achieved at 60 minutes for hepatobiliary phase imaging.
Area of Science:
- Medical Imaging
- Radiology
- Hepatology
Context:
- Gadoxetate Sodium (Gd-EOB-DTPA, EOB) enables combined vascular and hepatobiliary phase MRI.
- Challenges include suboptimal arterial phase timing and insufficient contrast enhancement.
- Earlier hepatobiliary phase imaging (before 20 min) is being explored to shorten examination times.
Purpose:
- To determine optimal scan timing for both arterial and hepatobiliary phases using Gd-EOB-DTPA.
- To evaluate the impact of scan timing on contrast enhancement and liver-spleen contrast ratio (C(L-S)).
Summary:
- Multiphase arterial phase imaging acquisition is recommended around 25 seconds post-injection for optimal enhancement.
- The highest C(L-S) in the hepatobiliary phase was observed at 60 minutes post-injection.
- Acquiring hepatobiliary phase images earlier than 20 minutes significantly lowered the C(L-S).
Impact:
- Establishes precise timing protocols for Gd-EOB-DTPA enhanced MRI, improving diagnostic accuracy.
- Highlights the importance of adhering to the 60-minute hepatobiliary phase for maximal contrast.
- Suggests future research into tailoring Gd-EOB-DTPA protocols based on liver disease severity.
