PURPOSE: We compared 3-Tesla (3-T) and 1.5-Tesla (1.5-T) cardiac magnetic resonance imaging (MRI) for the assessment of myocardial viability in nearly identical experimental conditions. MATERIALS AND METHODS: Thirty-five patients (mean age 63+/-11; 94.2% men) submitted to primary coronary angioplasty underwent both 3-T and 1.5-T cardiac MRI, which was considered the gold standard. Comparison was performed on the basis of the same viability imaging protocol, which included resting cine-MR [balanced fast-field echo (B-FFE) sequence] followed by contrast-enhanced MR to evaluate perfusion and delayed enhancement (DE). We then performed functional index measurements and visual estimation of kinesis, perfusion and DE referring to a 5-point scale. Image quality was assessed on the basis of signal to noise ratio (SNR) and contrast to noise ratio (CNR). RESULTS: We found nonsignificant differences between the two scanners (P=NS) in measuring the functional and viability parameters. Myocardial SNR was significantly higher with 3-T MRI compared with 1.5-T MRI (61.3% gain). Even though a loss of CNR was recorded in B-FFE and in first-pass perfusion sequences (12.4% and 23.7%, respectively), on DE images, we quantified the increase of SNR and CNR of infarction of 387.8% and 330%, respectively. CONCLUSIONS: We found that 3-T MRI showed high concordance with 1.5-T MRI in the evaluation of functional and viability parameters and provided better evidence of damaged myocardium.
|Data di pubblicazione:||2008|
|Titolo:||3-Tesla MRI for the evaluation of myocardial viability: a comparative study with 1.5-Tesla MRI|
|Autore/i:||G. LIGABUE; FIOCCHI F; FERRARESI S; BARBIERI A; ROSSI R; MODENA MG; ROMAGNOLI R; TORRICELLI P|
|Digital Object Identifier (DOI):||10.1007/s11547-008-0256-7|
|Codice identificativo ISI:||WOS:000255469900004|
|Codice identificativo Scopus:||2-s2.0-44249091409|
|Codice identificativo Pubmed:||18493772|
|Citazione:||3-Tesla MRI for the evaluation of myocardial viability: a comparative study with 1.5-Tesla MRI / G. LIGABUE; FIOCCHI F; FERRARESI S; BARBIERI A; ROSSI R; MODENA MG; ROMAGNOLI R; TORRICELLI P. - In: LA RADIOLOGIA MEDICA. - ISSN 0033-8362. - ELETTRONICO. - 113(2008), pp. 347-362.|
|Tipologia||Articolo su rivista|
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