Free-breathing, nongated real-time delayed enhancement MRI of myocardial infarcts: a comparison with conventional delayed enhancement.
J Magn Reson Imaging
; 28(3): 621-5, 2008 Sep.
Article
de En
| MEDLINE
| ID: mdl-18777543
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 ANDMETHODS:
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.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Algorithmes
/
Imagerie par résonance magnétique
/
Interprétation d'images assistée par ordinateur
/
Amélioration d'image
/
Techniques d'imagerie avec synchronisation respiratoire
/
Infarctus du myocarde
Type d'étude:
Diagnostic_studies
/
Evaluation_studies
/
Prognostic_studies
Limites:
Aged
/
Female
/
Humans
/
Male
Langue:
En
Journal:
J Magn Reson Imaging
Sujet du journal:
DIAGNOSTICO POR IMAGEM
Année:
2008
Type de document:
Article
Pays d'affiliation:
Canada