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Three-dimensional contrast-enhanced hepatic MR imaging: comparison between a centric technique and a linear approach with partial Fourier along both slice and phase directions.

Authors
 Kyung Ah Kim  ;  Gwenael Herigault  ;  Myeong-Jin Kim  ;  Young Eun Chung  ;  Hye-Suk Hong  ;  Sun Young Choi 
Citation
 JOURNAL OF MAGNETIC RESONANCE IMAGING, Vol.33(1) : 160-166, 2011 
Journal Title
JOURNAL OF MAGNETIC RESONANCE IMAGING
ISSN
 1053-1807 
Issue Date
2011
MeSH
Adult ; Aged ; Algorithms ; Computer Simulation ; Contrast Media ; Female ; Fourier Analysis ; Gadolinium DTPA* ; Humans ; Image Enhancement/methods* ; Image Interpretation, Computer-Assisted/methods* ; Imaging, Three-Dimensional/methods* ; Linear Models ; Liver/pathology* ; Liver Neoplasms/pathology* ; Magnetic Resonance Imaging/methods* ; Male ; Middle Aged ; Models, Biological ; Reproducibility of Results ; Sensitivity and Specificity
Keywords
MRI ; liver imaging ; gadoxetic acid disodium ; Cartesian k-space ordering ; T1-weighted gradient echo
Abstract
PURPOSE: To compare the image quality of two variants of a three-dimensional (3D) gradient echo sequence (GRE) for hepatic MRI.

MATERIALS AND METHODS: Thirty-nine patients underwent hepatic MRI on a 3.0 Tesla (T) magnet (Intera Achieva; Philips Medical Systems). The clinical protocol included two variants of a 3D GRE with fat suppression: (i) a "centric" approach, with elliptical centric k-space ordering and (ii) an "enhanced" approach using linear sampling and partial Fourier in both the slice and phase encoding direction. "Centric" and "Enhanced" 3D GRE images were obtained both precontrast (n = 32) and after gadoxetic acid injection (n = 39). Two reviewers jointly reviewed MR images for anatomic sharpness, overall contrast, homogeneity, and absence of artifacts. The liver-to-lesion signal difference ratio (SDR) was measured. Paired sample Wilcoxon test and paired t-tests were used.

RESULTS: Enhanced 3D GRE images performed better than centric 3D GRE images with respect to anatomic sharpness (P = 0.0156), overall contrast (P = 0.0195), homogeneity (P < 0.0001), and absence of artifacts (P = 0.0003) on precontrast images. For postcontrast MRI, enhanced 3D GRE images showed better quality in terms of overall contrast (P = 0.0195), homogeneity (P < 0.0001), and absence of artifacts (P = 0.009). Liver-to-lesion SDR on enhanced 3D GRE images (0.48 ± 0.13) was significantly higher than that of conventional 3D GRE images (0.40 ± 0.19, P = 0.0004) on postcontrast images, but not on precontrast images.

CONCLUSION: The enhanced 3D GRE sequence available on our scanner provided better hepatic image quality than the centric variant, without compromising lesion contrast.
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/jmri.22436/abstract
DOI
10.1002/jmri.22436
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ah(김경아)
Kim, Myeong Jin(김명진) ORCID logo https://orcid.org/0000-0001-7949-5402
Chung, Yong Eun(정용은) ORCID logo https://orcid.org/0000-0003-0811-9578
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/95120
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