Acute myocardial injury was evaluated in 21 patients by using a contrast material-enhanced T1ρ-weighted cine turbo field-echo magnetic resonance (MR) imaging sequence and a delayed-enhancement sequence. In 12 of 21 patients, conventional T1-weighted contrast-enhanced cine turbo field-echo MR images were also collected for direct comparison with T1ρ- weighted images. Delayed-enhancement technique distinctly characterized irreversible injury (percentage enhancement, 588% ± 344). With T1 ρ weighting, percentage enhancement of irreversibly injured myocardium was 68% ± 41, compared with 23% ± 24 without T1 ρ weighting (P < .006). The addition of T1ρ weighting to contrast-enhanced cine turbo field-echo MR sequences may offer a new contrast enhancement mechanism for characterization of acutely infarcted myocardium.
- Magnetic resonance (MR), cine study
- Magnetic resonance (MR), tissue characterization
- Myocardium, MR
- Myocardium, infarction
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging