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Usefulness of Controlled Aliasing in Parallel Imaging Results in Higher Acceleration in Gadoxetic Acid-Enhanced Liver Magnetic Resonance Imaging to Clarify the Hepatic Arterial Phase

Authors
Park, Yang ShinLee, Chang HeeKim, In SeongKiefer, BertholdWoo, Seung TaeKim, Kyeong AhPark, Cheol Min
Issue Date
Mar-2014
Publisher
LIPPINCOTT WILLIAMS & WILKINS
Keywords
gadoxetic acid; arterial phase; Gd-EOB-DTPA; CAIPIRINHA; liver; MRI
Citation
INVESTIGATIVE RADIOLOGY, v.49, no.3, pp 183 - 188
Pages
6
Indexed
SCI
SCIE
SCOPUS
Journal Title
INVESTIGATIVE RADIOLOGY
Volume
49
Number
3
Start Page
183
End Page
188
URI
https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/9533
DOI
10.1097/RLI.0000000000000011
ISSN
0020-9996
1536-0210
Abstract
Purpose We aimed to determine whether the controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA) technique could improve the image quality of the hepatic arterial phase of gadoxetic acid-enhanced liver magnetic resonance (MR) imaging. Materials and Methods A total of 320 patients underwent gadoxetic acid-enhanced liver MR imaging: a conventional protocol (a fixed scan delay and 2-mL/s injection) using a standard 3-T MR system (Trio-Tim; Siemens, commercialized since 2005) (group A), an optimized protocol (bolus tracking and 1-mL/s injection) using a standard 3-T MR (group B), an optimized protocol using a new 3-T MR (Skyra; Siemens, commercialized since 2012) (group C), and an optimized protocol with CAIPIRINHA using a new 3-T MR (group D). The image quality of the hepatic arterial phase was graded using a 4-point rating scale from 1 (no artifacts) to 4 points (non-diagnostic images with severe artifacts). The differences in image quality scores among the 4 groups were evaluated. In addition, the detection rates of hypervascular hepatocellular carcinomas among the 4 groups were evaluated. Results Scores of 4 points were observed in groups A (n = 7), B (n = 5), and C (n = 3) but not in group D. The median image quality score was 2 in groups A and B and 1 in groups C and D. From group A to group D, the median image quality score decreased significantly (P = 0.0001). The median image quality score was significantly lower in group D than in groups A and B (P = 0.0001 and 0.001, respectively), whereas there was no significant difference observed between groups C and D (P = 0.656). The detection rates of hypervascular hepatocellular carcinomas on the hepatic arterial phase were not significantly different among the groups (all P > 0.03), except between groups A and D (P = 0.007). Conclusions The CAIPIRINHA technique improved the image quality of hepatic arterial phase imaging with gadoxetic acid, reducing the number of non-diagnostic arterial phase studies.
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Lee, Chang Hee
Guro Hospital (Department of Radiology, Guro Hospital)
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