Acute myocardial injury was evaluated in 21 patients by using a contrast material-enhanced T1rho-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 T1rho-weighted images. Delayed-enhancement technique distinctly characterized irreversible injury (percentage enhancement, 588% +/- 344). With T1rho weighting, percentage enhancement of irreversibly injured myocardium was 68% +/- 41, compared with 23% +/- 24 without T1rho weighting (P <.006). The addition of T1rho weighting to contrast-enhanced cine turbo field-echo MR sequences may offer a new contrast enhancement mechanism for characterization of acutely infarcted myocardium.
Radiology
- Myocardial Infarction
- Magnetic Resonance Imaging, Cine
- Image Processing, Computer-Assisted
- Sensitivity And Specificity
- Image Enhancement
- Adult
- Myocardium
- Gadolinium Dtpa
- Humans
- Electrocardiography
- Male
- Reference Values
- Aged, 80 And Over
- Female
- Aged
- Middle Aged
- Contrast Media
- Myocardial Reperfusion Injury
39