Image quality and myocardial scar size determined with magnetic resonance imaging in patients with permanent atrial fibrillation: A comparison of two imaging protocols

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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

Rosendahl, Lene (author): Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet

Ahlander, Britt-Marie, 1954- (author): Department of Radiology, Ryhov County Hospital, Jönköping, Sweden

Björklund, Per-Gunnar (author): Department of Clinical Physiology, Ryhov County Hospital, Jönköping, Sweden

Blomstrand, Peter (author): Department of Clinical Physiology, Ryhov County Hospital, Jönköping, Sweden

Brudin, Lars (author): Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet

Engvall, Jan (author): Östergötlands Läns Landsting,Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet,Fysiologiska kliniken

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John Wiley & Sons, 2010
2010
English.
In: Clinical Physiology and Functional Imaging. - : John Wiley & Sons. - 1475-0961 .- 1475-097X. ; 30:2, s. 122-129

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Journal article (peer-reviewed)

Abstract Subject headings

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). SNRinfarct and SNRblood were significantly better for IR_FGRE than for SS_SSFP (P = 0·048, P = 0·018). No significant difference was found in SNRmyocardium 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.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)

Keyword

Atrial fibrillation
Magnetic resonance imaging
Myocardial infarction
Segmented inversion recovery 2D fast gradient echo
Single shot inversion recovery 2D steady-state free precession
anticoagulant agent
antihypertensive agent
beta adrenergic receptor blocking agent
hydroxymethylglutaryl coenzyme A reductase inhibitor
oral antidiabetic agent
adult
aged
article
artifact
chronic disease
clinical article
clinical protocol
contrast enhancement
controlled study
disease severity
female
heart atrium fibrillation
heart infarction size
human
image display
image quality
intermethod comparison
male
nuclear magnetic resonance imaging
priority journal
signal noise ratio
steady state
Aged
80 and over
Artifacts
Cicatrix
Electrocardiography
Humans
Middle Aged
Myocardium
Reproducibility of Results
Systole
Ventricular Function
Left
Radiology
Cardiology
MEDICINE

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ref (subject category)
art (subject category)

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By the author/editor: Rosendahl, Lene; Ahlander, Britt- ...; Björklund, Per-G ...; Blomstrand, Pete ...; Brudin, Lars; Engvall, Jan

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cardiac and Card ...

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