Quantification of late gadolinium enhancement cardiovascular MRI in patients with coronary artery chronic total occlusion.

Abstract:

AIM:To determine the most accurate and reproducible semi-automated greyscale thresholding technique for quantifying late gadolinium enhancement (LGE) in cardiovascular magnetic resonance imaging (CMRI), by using positron-emission tomography (PET) as the reference standard in patients with coronary artery chronic total occlusion (CTO). MATERIALS AND METHODS:LGE in CMRI, single-photon-emission computed tomography (SPECT), and PET were performed within 1 week in each of 63 patients with known CTO. The presence and quantity of LGE were determined with greyscale thresholds of 2, 4, 5, 6, and 8 standard deviations (SDs) above the mean signal intensity for normal remote myocardium and full width at half maximum (FWHM). The infarcted myocardium was delineated by PET. RESULTS:Sixty-three patients and 1,008 segments were analysed. Based on patient analysis, with PET as the reference standard, the 5 SD method yielded the strongest correlation (r=0.85, p<0.0001) compared with the 2 SDs (r=0.42), 4 SDs (r=0.73), 6 SDs (r=0.81), 8 SDs (r=0.71), and FWHM (r=0.69; p<0.001 for all comparisons). The 5 SDs threshold quantification showed high interobserver and intra-observer agreement (intraclass correlation coefficient [ICC]=0.90, p<0.0001; ICC=0.93, p<0.0001, respectively). CONCLUSIONS:Semi-automated LGE CMRI greyscale thresholding with 5 SDs above the mean signal intensity for normal remote myocardium yields the strongest correlation to the extent of LGE identified using PET and is highly reproducible in patients with CTO.

journal_name

Clin Radiol

journal_title

Clinical radiology

authors

Zhang LJ,Dong W,Li JN,Mi HZ,Jiao J,Dou RY,An J,Liu JL,He Y,Song XT

doi

10.1016/j.crad.2020.03.032

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

643.e19-643.e26

issue

8

eissn

0009-9260

issn

1365-229X

pii

S0009-9260(20)30136-7

journal_volume

75

pub_type

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