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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Myocardial late gadolinium enhancement: Accuracy of t1 mapping-based synthetic inversion-recovery imaging
Radiology, Volume 278, No. 2, Year 2016
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Description
Purpose: To compare the accuracy of detection and quantification of myocardial late gadolinium enhancement (LGE) with a synthetic inversion-recovery (IR) approach with that of conventional IR techniques. Materials and Methods: This prospective study was approved by the institutional review board and compliant with HIPAA. All patients gave written informed consent. Between June and November 2014, 43 patients (25 men; mean age, 54 years 6 16) suspected of having previous myocardial infarction underwent magnetic resonance (MR) imaging, including contrast material-enhanced LGE imaging and T1 mapping. Synthetic magnitude and phase-sensitive IR images were generated on the basis of T1 maps. Images were assessed by two readers. Differences in the per-patient and persegment LGE detection rates between the synthetic and conventional techniques were analyzed with the McNemar test, and the accuracy of LGE quantification was calculated with the paired t test and Bland-Altman statistics. Interreader agreement for the detection and quantification of LGE was analyzed with k and Bland-Altman statistics, respectively. Results: Seventeen of the 43 patients (39%) had LGE patterns consistent with myocardial infarction. The sensitivity and specificity of synthetic magnitude and phase-sensitive IR techniques in the detection of LGE were 90% and 95%, respectively, with patient-based analysis and 94% and 99%, respectively, with segment-based analysis. The area of LGE measured with synthetic IR techniques showed excellent agreement with that of conventional techniques (4.35 cm2 6 1.88 and 4.14 cm26 1.62 for synthetic magnitude and phase-sensitive IR, respectively, compared with 4.25 cm2 6 1.92 and 4.22 cm2 6 1.86 for conventional magnitude and phase-sensitive IR, respectively; P <05). Interreader agreement was excellent for the detection (k . 0.81) and quantification (bias range, 20.34 to 0.40; P <05) of LGE. Conclusion: The accuracy of the T1 map-based synthetic IR approach in the detection and quantification of myocardial LGE in patients with previous myocardial infarction was similar to that of conventional IR techniques. The use of T1 mapping to derive synthetic LGE images may reduce imaging times and operator dependence in future T1 mapping protocols with full left ventricular coverage. © RSNA, 2015.
Authors & Co-Authors
Varga-Szemes, Akos
United States, Charleston
Medical University of South Carolina
Spottiswoode, Bruce S.
United States, New York
Siemens Usa
Surányi, Pál S.
United States, Charleston
Medical University of South Carolina
De Cecco, Carlo N.
United States, Charleston
Medical University of South Carolina
Wichmann, Julian Lukas
United States, Charleston
Medical University of South Carolina
Germany, Frankfurt am Main
Universitätsklinikum Frankfurt
Schoepf, U. Joseph
United States, Charleston
Medical University of South Carolina
Statistics
Citations: 20
Authors: 6
Affiliations: 8
Identifiers
Doi:
10.1148/radiol.2015150162
ISSN:
00338419
Research Areas
Health System And Policy
Study Design
Cohort Study
Participants Gender
Male