Triple Arterial Phase MR Imaging with Gadoxetic Acid Using a Combination of Contrast Enhanced Time Robust Angiography, Keyhole, and Viewsharing Techniques and Two-Dimensional Parallel Imaging in Comparison with Conventional Single Arterial Phase.
10.3348/kjr.2016.17.4.522
- Author:
Jeong Hee YOON
1
;
Jeong Min LEE
;
Mi Hye YU
;
Eun Ju KIM
;
Joon Koo HAN
Author Information
1. Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea. jmlshy2000@gmail.com
- Publication Type:Original Article
- Keywords:
Arterial phase;
Gadoxetic acid;
Liver;
MRI;
View sharing
- MeSH:
Angiography*;
Artifacts;
Ethics Committees, Research;
Fluoroscopy;
Humans;
Informed Consent;
Liver;
Magnetic Resonance Imaging*;
Retrospective Studies
- From:Korean Journal of Radiology
2016;17(4):522-532
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To determine whether triple arterial phase acquisition via a combination of Contrast Enhanced Time Robust Angiography, keyhole, temporal viewsharing and parallel imaging can improve arterial phase acquisition with higher spatial resolution than single arterial phase gadoxetic-acid enhanced magnetic resonance imaging (MRI). MATERIALS AND METHODS: Informed consent was waived for this retrospective study by our Institutional Review Board. In 752 consecutive patients who underwent gadoxetic acid-enhanced liver MRI, either single (n = 587) or triple (n = 165) arterial phases was obtained in a single breath-hold under MR fluoroscopy guidance. Arterial phase timing was assessed, and the degree of motion was rated on a four-point scale. The percentage of patients achieving the late arterial phase without significant motion was compared between the two methods using the χ2 test. RESULTS: The late arterial phase was captured at least once in 96.4% (159/165) of the triple arterial phase group and in 84.2% (494/587) of the single arterial phase group (p < 0.001). Significant motion artifacts (score ≤ 2) were observed in 13.3% (22/165), 1.2% (2/165), 4.8% (8/165) on 1st, 2nd, and 3rd scans of triple arterial phase acquisitions and 6.0% (35/587) of single phase acquisitions. Thus, the late arterial phase without significant motion artifacts was captured in 96.4% (159/165) of the triple arterial phase group and in 79.9% (469/587) of the single arterial phase group (p < 0.001). CONCLUSION: Triple arterial phase imaging may reliably provide adequate arterial phase imaging for gadoxetic acid-enhanced liver MRI.
