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Stimulated-echo acquisition mode (STEAM) MRI for black-blood delayed hyperenhanced myocardial imaging. J Magn Reson Imaging 2008 Jan;27(1):229-38

Date

12/01/2007

Pubmed ID

18050331

DOI

10.1002/jmri.21220

Scopus ID

2-s2.0-37849030921   7 Citations

Abstract

PURPOSE: To develop a breathhold method for black-blood viability imaging of the heart that may facilitate identifying the endocardial border.

MATERIALS AND METHODS: Three stimulated-echo acquisition mode (STEAM) images were obtained almost simultaneously during the same acquisition using three different demodulation values. Two of the three images were used to construct a black-blood image of the heart. The third image was a T(1)-weighted viability image that enabled detection of hyperintense infarcted myocardium after contrast agent administration. The three STEAM images were combined into one composite black-blood viability image of the heart. The composite STEAM images were compared to conventional inversion-recovery (IR) delayed hyperenhanced (DHE) images in nine human subjects studied on a 3T MRI scanner.

RESULTS: STEAM images showed black-blood characteristics and a significant improvement in the blood-infarct signal-difference to noise ratio (SDNR) when compared to the IR-DHE images (34 +/- 4.1 vs. 10 +/- 2.9, mean +/- standard deviation (SD), P < 0.002). There was sufficient myocardium-infarct SDNR in the STEAM images to accurately delineate infarcted regions. The extracted infarcts demonstrated good agreement with the IR-DHE images.

CONCLUSION: The STEAM black-blood property allows for better delineation of the blood-infarct border, which would enhance the fast and accurate measurement of infarct size.

Author List

Ibrahim el-SH, Weiss RG, Stuber M, Kraitchman DL, Pan L, Spooner AE, Osman NF

Author

El-Sayed H. Ibrahim PhD Associate Professor in the Radiology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Computer Simulation
Contrast Media
Gadolinium DTPA
Humans
Image Interpretation, Computer-Assisted
Magnetic Resonance Imaging
Myocardial Infarction
Phantoms, Imaging