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BibTeX
Cardiac MR elastography using reduced‐FOV, single‐shot, spin‐echo EPI
Magnetic resonance in medicine, 2018-07, Vol.80 (1), p.231-238
Sui, Yi
Arunachalam, Shivaram P.
Arani, Arvin
Trzasko, Joshua D.
Young, Phillip M.
Glockner, James F.
Glaser, Kevin J.
Lake, David S.
McGee, Kiaran P.
Manduca, Armando
Rossman, Phillip J.
Ehman, Richard L.
Araoz, Philip A.
2018
Details
Autor(en) / Beteiligte
Sui, Yi
Arunachalam, Shivaram P.
Arani, Arvin
Trzasko, Joshua D.
Young, Phillip M.
Glockner, James F.
Glaser, Kevin J.
Lake, David S.
McGee, Kiaran P.
Manduca, Armando
Rossman, Phillip J.
Ehman, Richard L.
Araoz, Philip A.
Titel
Cardiac MR elastography using reduced‐FOV, single‐shot, spin‐echo EPI
Ist Teil von
Magnetic resonance in medicine, 2018-07, Vol.80 (1), p.231-238
Ort / Verlag
United States: Wiley Subscription Services, Inc
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Wiley Online Library All Journals
Beschreibungen/Notizen
Purpose To implement a reduced field of view (rFOV) technique for cardiac MR elastography (MRE) and to demonstrate the improvement in image quality of both magnitude images and post‐processed MRE stiffness maps compared to the conventional full field of view (full‐FOV) acquisition. Methods With Institutional Review Board approval, 17 healthy volunteers underwent both full‐FOV and rFOV cardiac MRE scans using 140‐Hz vibrations. Two cardiac radiologists blindly compared the magnitude images and stiffness maps and graded the images based on several image quality attributes using a 5‐point ordinal scale. Fisher's combined probability test was performed to assess the overall evaluation. The octahedral shear strain‐based signal‐to‐noise ratio (OSS‐SNR) and median stiffness over the left ventricular myocardium were also compared. Results One volunteer was excluded because of an inconsistent imaging resolution during the exam. In the remaining 16 volunteers (9 males, 7 females), the rFOV scans outperformed the full‐FOV scans in terms of subjective image quality and ghosting artifacts in the magnitude images and stiffness maps, as well as the overall preference. The quantitative measurements showed that rFOV had significantly higher OSS‐SNR (median: 1.4 [95% confidence interval (CI): 1.2–1.5] vs. 2.1 [95% CI: 1.8–2.4]), P < 0.05) compared to full‐FOV. Although no significant change was found in the median myocardial stiffness between the 2 scans, we observed a decrease in the stiffness variation within the myocardium from 2.1 kPa (95% CI: [1.9, 2.3]) to 1.9 kPa (95% CI: [1.7, 2.0]) for full‐FOV and rFOV, respectively (P < 0.05) in a subgroup of 7 subjects with ghosting present in the myocardium. Conclusion This pilot volunteer study demonstrated that rFOV cardiac MRE has the capability to reduce ghosting and to improve image quality in both MRE magnitude images and stiffness maps. Magn Reson Med 80:231–238, 2018. © 2017 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Sprache
Englisch
Identifikatoren
ISSN: 0740-3194
eISSN: 1522-2594
DOI: 10.1002/mrm.27029
Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_5876088
Format
–
Schlagworte
Adult
,
Algorithms
,
cardiac MRE
,
Confidence intervals
,
Echo-Planar Imaging - methods
,
Elasticity Imaging Techniques - methods
,
Female
,
Females
,
Field of view
,
Full Papers—Imaging Methodology
,
Ghosting
,
Healthy Volunteers
,
Heart
,
Heart - diagnostic imaging
,
Heart diseases
,
Heart Ventricles - diagnostic imaging
,
Humans
,
Image Interpretation, Computer-Assisted - methods
,
Image quality
,
Image resolution
,
Lipids
,
Magnetic resonance
,
Magnetic Resonance Spectroscopy - methods
,
Male
,
Males
,
Medicine
,
MR elastography
,
myocardial stiffness
,
Myocardium
,
Myocardium - pathology
,
Phantoms, Imaging
,
Pilot Projects
,
Probability
,
Quality management
,
Radio Waves
,
Radiology
,
reduced FOV
,
Resonance
,
Shear strain
,
Shear Strength
,
Signal-To-Noise Ratio
,
Statistical analysis
,
Stiffness
,
Stress, Mechanical
,
Subgroups
,
Ventricle
,
Vibrations
,
Volunteers
,
Young Adult
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