The apparent inversion time for optimal delayed enhancement magnetic resonance imaging differs between the right and left ventricles.

摘要: Background. Delayed post-contrast magnetic resonance (MR) imaging involves suppression of signal from myocardium using inversion times (TI) between 150–225 ms, when the appears dark and fibrotic scar bright. We noticed that at a TI optimized for left ventricle (LV), right (RV) appeared brighter. Purpose. The purpose this study was to evaluate in RV compared LV, try identify cause observation. Methods. studied 31 patients (ages ranged 17–79 years, 11 females) who had an MR scan on 1.5 T GE scanner. short-axis images were obtained 20 minutes after injection 0.2 mmol/kg intravenous gadolinium chelate. optimization performed by acquiring range within single breath hold, increments 25 msec. time resulted lowest LV recorded. Results. With sequence employed, leading ms. At suppression, corrected significantly higher as (29 ± 13 au vs. 15 8 au, p < 0.001). findings similar only body coil. required suppress usually 150 observation persisted before infusion. Conclusion. myocardial be different LVand RV. Potential mechanisms include partial volume averaging with fat or blood pool (related increased trabeculation) Alternatively, (within Thebesian veins arterioluminal communications) leads altered due effects.