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Image quality and myocardial scar size determined with magnetic resonance imaging in patients with permanent atrial fibrillation: a comparison of two imaging protocols
Department of Clinical Physiology, Ryhov County Hospital, Jönköping, Sweden; Center for Medical Image Science and Visualization, Linköping University, Linköping, Sweden.
Department of Radiology, Ryhov County Hospital, Jönköping, Sweden.ORCID iD: 0000-0001-5740-3538
Department of Clinical Physiology, Ryhov County Hospital, Jönköping, Sweden.
Department of Clinical Physiology, Ryhov County Hospital, Jönköping, Sweden.
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2010 (English)In: Clinical Physiology and Functional Imaging, ISSN 1475-0961, E-ISSN 1475-097X, Vol. 30, no 2, p. 122-129Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Magnetic resonance imaging (MRI) of the heart generally requires breath holding and a regular rhythm. Single shot 2D steady-state free precession (SS_SSFP) is a fast sequence insensitive to arrhythmia as well as breath holding. Our purpose was to determine image quality, signal-to-noise (SNR) and contrast-to-noise (CNR) ratios and infarct size with a fast single shot and a standard segmented MRI sequence in patients with permanent atrial fibrillation and chronic myocardial infarction.

METHODS: Twenty patients with chronic myocardial infarction and ongoing atrial fibrillation were examined with inversion recovery SS_SSFP and segmented inversion recovery 2D fast gradient echo (IR_FGRE). Image quality was assessed in four categories: delineation of infarcted and non-infarcted myocardium, occurrence of artefacts and overall image quality. SNR and CNR were calculated. Myocardial volume (ml) and infarct size, expressed as volume (ml) and extent (%), were calculated, and the methodological error was assessed.

RESULTS: SS_SSFP had significantly better quality scores in all categories (P = 0.037, P = 0.014, P = 0.021, P = 0.03). SNR(infarct) and SNR(blood) were significantly better for IR_FGRE than for SS_SSFP (P = 0.048, P = 0.018). No significant difference was found in SNR(myocardium) and CNR. The myocardial volume was significantly larger with SS_SSFP (170.7 versus 159.2 ml, P<0.001), but no significant difference was found in infarct volume and infarct extent.

CONCLUSION: SS_SSFP displayed significantly better image quality than IR_FGRE. The infarct size and the error in its determination were equal for both sequences, and the examination time was shorter with SS_SSFP.

Place, publisher, year, edition, pages
Blackwell Publishing, 2010. Vol. 30, no 2, p. 122-129
Keywords [en]
Atrial fibrillation, magnetic resonance imaging, myocardial infarction, segmented inversion recovery 2D fast gradient echo, single shot inversion recovery 2D steady-state free precession
National Category
Radiology, Nuclear Medicine and Medical Imaging
Research subject
Radiology; Cardiology
Identifiers
URN: urn:nbn:se:oru:diva-72074DOI: 10.1111/j.1475-097X.2009.00914.xISI: 000274438800006PubMedID: 20041907Scopus ID: 2-s2.0-76949107327OAI: oai:DiVA.org:oru-72074DiVA, id: diva2:1285318
Funder
Futurum - Academy for Health and Care, Jönköping County Council, SwedenJönköping County CouncilMedical Research Council of Southeast Sweden (FORSS)Swedish Heart Lung Foundation
Note

Funding Agency:

Linköping Heart Centre

Available from: 2019-02-04 Created: 2019-02-04 Last updated: 2019-02-13Bibliographically approved

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