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Scan time reduction with a small field-of-view quadruple inversion-recovery high-resolution contrast-enhanced MRI for carotid atherosclerosis / 南方医科大学学报
Journal of Southern Medical University ; (12): 1-7, 2013.
Artículo en Inglés | WPRIM | ID: wpr-352320
ABSTRACT
<p><b>OBJECTIVE</b>To reduce the acquisition time of carotid high-resolution contrast-enhanced magnetic resonance imaging (CEMRI), we designed a small field-of-view (FOV) quadruple-inversion-recovery (SF-QIR) T1WI and evaluated the image quality.</p><p><b>METHODS</b>Twenty-four subjects with carotid plaque were enrolled in our study. All the subjects were imaged using the same 3.0T MRI by SF-QIR and standard rectangular FOV QIR (SrF-QIR) with identical parameters except for the phase-encoding step numbers and the RF excitation methods. Three independent readers qualitatively evaluated the differences between the two sequences in regard of the carotid outer wall border delineation, fibrous cap and lipid-rich necrotic core (LR-NC) border delineation, and diagnostic confidence. The quantitative measurements included maximal stenosis, wall area, LR-NC area, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR). The inter-reader variability was assessed.</p><p><b>RESULTS</b>The application of SF-QIR combined with orthogonal radio frequency excitation resulted in nearly half of the scan time with the SrF-QIR. Both qualitative and quantitative assessment by the readers revealed no significant differences between the two sequences except for SNR and CNR (Pgt;0.05). Since the mean loss of SNR with SF-QIR was 37.7%, SrF-QIR demonstrated a superior performance in SNR (P<0.001).</p><p><b>CONCLUSION</b>The small FOV QIR sequence is effective in high-resolution CEMRI for evaluating carotid plaques and can effectively reduce the scan time and eliminate motion artifacts.</p>
Asunto(s)
Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Patología / Imagen por Resonancia Magnética / Aumento de la Imagen / Enfermedades de las Arterias Carótidas / Diagnóstico / Métodos Tipo de estudio: Estudio diagnóstico / Investigación cualitativa Límite: Adulto / Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Inglés Revista: Journal of Southern Medical University Año: 2013 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Patología / Imagen por Resonancia Magnética / Aumento de la Imagen / Enfermedades de las Arterias Carótidas / Diagnóstico / Métodos Tipo de estudio: Estudio diagnóstico / Investigación cualitativa Límite: Adulto / Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Inglés Revista: Journal of Southern Medical University Año: 2013 Tipo del documento: Artículo