Abstract
Purpose: To compare a free-breathing, nongated, and black-blood real-time delayed enhancement (RT-DE) sequence to the conventional inversion recovery gradient echo (IR-GRE) sequence for delayed enhancement MRI. Materials and Methods: Twenty-three patients with suspected myocardial infarct (MI) were examined using both the IR-GRE and RT-DE imaging sequences. The sensitivity and specificity of RT-DE for detecting MI, using IR-GRE as the gold standard, was determined. The contrast-to-noise ratios (CNR) between the two techniques were also compared. Results: RT-DE had a high sensitivity and specificity (94% and 98%, respectively) for identifying MI. The total acquisition time to image the entire left ventricle was significantly shorter using RT-DE than IR-GRE (5.6 ± 0.9 versus 11.5 ± 1.9 min). RT-DE had a slightly lower infarct-myocardium CNR but a higher infarct-blood CNR than IR-GRE imaging. Compared with IR-GRE, RT-DE accurately measured total infarct sizes. Conclusion: RT-DE can be used for delayed enhancement imaging during free-breathing and without cardiac gating.
Original language | English (US) |
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Pages (from-to) | 621-625 |
Number of pages | 5 |
Journal | Journal of Magnetic Resonance Imaging |
Volume | 28 |
Issue number | 3 |
DOIs | |
State | Published - Sep 2008 |
Externally published | Yes |
Keywords
- Delayed enhancement
- MRI
- Myocardial infarct
- Real-time
- SSFP
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging