In:
Journal of Magnetic Resonance Imaging, Wiley, Vol. 30, No. 5 ( 2009-11), p. 967-972
Abstract:
To find evidence of diffuse fibrosis in dilated cardiomyopathy (DCM) patients by comparing measurements on clinical late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) studies between DCM and healthy subjects. Materials and Methods: LGE‐CMR and the Look–Locker images from 20 DCM patients and 17 healthy controls were analyzed. Blood signal‐to‐noise ratio (SNR), myocardium SNR, and blood‐to‐myocardium contrast‐to‐noise ratio (CNR) were measured on the LGE‐CMR images. The optimal inversion time (TI) to null blood and myocardium was determined on the Look–Locker images. The postcontrast T 1 was estimated using a phantom study that correlated optimal TI and heart rate to T 1 . Results: The blood SNR was lower, myocardium SNR was higher, and the blood‐to‐myocardium CNR was lower (6.6 ± 0.7 vs. 10.3 ± 0.9, P = 0.004) on DCM LGE‐CMR images as compared to controls. The blood‐myocardium optimal TI difference (ΔTI) was lower (38 ± 2 msec vs. 55 ± 3 msec, P 〈 0.001) in DCM, and the estimated blood‐myocardium T 1 difference (ΔT 1 ) (116 ± 6 msec vs. 152 ± 8 msec, P = 0.001) was also lower. Conclusion: DCM patients have reduced blood‐myocardium ΔTI and ΔT 1 , and lower CNR as compared to controls, suggesting the presence of diffuse fibrosis. This may impact the interpretation of LGE data. J. Magn. Reson. Imaging 2009;30:967–972. © 2009 Wiley‐Liss, Inc.
Type of Medium:
Online Resource
ISSN:
1053-1807
,
1522-2586
Language:
English
Publisher:
Wiley
Publication Date:
2009
detail.hit.zdb_id:
1497154-9
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