Abstract
Purpose: We assessed what MR imaging parameters affected ringing artifacts during the arterial phase of gadoxetic acid-enhanced dynamic magnetic resonance (MR) imaging. Materials and Methods: We tested various parameters, including imaging matrices, choice of either sequential or elliptical centric phase-encoding scheme, scanning time, and contrast injection rate using new simulation software on a personal computer and visually evaluated clinical MR images retrospectively using a 4-point scale to assess ringing artifacts. Results: The simulation study revealed that square matrices, short scanning time, slow injection rate, and sequential view ordering effectively reduced ringing artifacts, findings confirmed in clinical practice using gadoxetic acid-enhanced MR imaging. Significantly fewer artifacts resulted using a slow injection rate (P<0.05) and using square matrices in the arterial (P<0.05), portal (P<0.01), and hepatocytic (P<0.05) phases. Conclusion: Choice of square matrix, slower injection rate, shorter scanning time, and sequential view ordering could reduce ringing artifacts.
| Original language | English |
|---|---|
| Pages (from-to) | 91-97 |
| Number of pages | 7 |
| Journal | Magnetic Resonance in Medical Sciences |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2012 |
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Keywords
- Dynamic MR imaging
- Gadoxetic acid
- Ringing artifact
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
Cite this
Reduction of ringing artifacts in the arterial phase of gadoxetic acid-enhanced dynamic MR imaging. / Tanimoto, Akihiro; Higuchi, Nobuya; Ueno, Akihisa.
In: Magnetic Resonance in Medical Sciences, Vol. 11, No. 2, 2012, p. 91-97.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reduction of ringing artifacts in the arterial phase of gadoxetic acid-enhanced dynamic MR imaging
AU - Tanimoto, Akihiro
AU - Higuchi, Nobuya
AU - Ueno, Akihisa
PY - 2012
Y1 - 2012
N2 - Purpose: We assessed what MR imaging parameters affected ringing artifacts during the arterial phase of gadoxetic acid-enhanced dynamic magnetic resonance (MR) imaging. Materials and Methods: We tested various parameters, including imaging matrices, choice of either sequential or elliptical centric phase-encoding scheme, scanning time, and contrast injection rate using new simulation software on a personal computer and visually evaluated clinical MR images retrospectively using a 4-point scale to assess ringing artifacts. Results: The simulation study revealed that square matrices, short scanning time, slow injection rate, and sequential view ordering effectively reduced ringing artifacts, findings confirmed in clinical practice using gadoxetic acid-enhanced MR imaging. Significantly fewer artifacts resulted using a slow injection rate (P<0.05) and using square matrices in the arterial (P<0.05), portal (P<0.01), and hepatocytic (P<0.05) phases. Conclusion: Choice of square matrix, slower injection rate, shorter scanning time, and sequential view ordering could reduce ringing artifacts.
AB - Purpose: We assessed what MR imaging parameters affected ringing artifacts during the arterial phase of gadoxetic acid-enhanced dynamic magnetic resonance (MR) imaging. Materials and Methods: We tested various parameters, including imaging matrices, choice of either sequential or elliptical centric phase-encoding scheme, scanning time, and contrast injection rate using new simulation software on a personal computer and visually evaluated clinical MR images retrospectively using a 4-point scale to assess ringing artifacts. Results: The simulation study revealed that square matrices, short scanning time, slow injection rate, and sequential view ordering effectively reduced ringing artifacts, findings confirmed in clinical practice using gadoxetic acid-enhanced MR imaging. Significantly fewer artifacts resulted using a slow injection rate (P<0.05) and using square matrices in the arterial (P<0.05), portal (P<0.01), and hepatocytic (P<0.05) phases. Conclusion: Choice of square matrix, slower injection rate, shorter scanning time, and sequential view ordering could reduce ringing artifacts.
KW - Dynamic MR imaging
KW - Gadoxetic acid
KW - Ringing artifact
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U2 - 10.2463/mrms.11.91
DO - 10.2463/mrms.11.91
M3 - Article
VL - 11
SP - 91
EP - 97
JO - Magnetic Resonance in Medical Sciences
JF - Magnetic Resonance in Medical Sciences
SN - 1347-3182
IS - 2
ER -