References of "Couvreur, Thierry"
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See detailDiagnostic performance of quantitative coronary computed tomography angiography and quantitative coronary angiography to predict hemodynamic significance of intermediate-grade stenoses
GHEKIERE, Olivier; DEWILDE, Willem; BELLEKENS, Michel ULg et al

in International Journal of Cardiovascular Imaging (The) (2015), 30(6),

Fractional flow reserve (FFR) during invasive coronary angiography has become an established tool for guiding treatment. However, only one-third of intermediate-grade coronary artery stenosis (ICAS) are ... [more ▼]

Fractional flow reserve (FFR) during invasive coronary angiography has become an established tool for guiding treatment. However, only one-third of intermediate-grade coronary artery stenosis (ICAS) are hemodynamically significant and require coronary revascularization. Additionally, the severity of stenosis visually established by coronary computed tomography angiography (CCTA) does not reliably correlate with the functional severity. Therefore, additional angiographic morphologic descriptors affecting hemodynamic significance are required. To evaluate quantitative stenosis analysis and plaque descriptors by CCTA in predicting the hemodynamic significance of ICAS and to compare it with quantitative catheter coronary angiography (QCA). QCA was performed in 65 patients (mean age 63 ± 9 years; 47 men) with 76 ICAS (40–70 %) on CCTA. Plaque descriptors were determined including circumferential extent of calcification, plaque composition, minimal lumen diameter (MLD) and area, diameter stenosis percentage (Ds %), area stenosis percentage and stenosis length on CCTA. MLD and Ds % were also analyzed on QCA. FFR was measured on 52 ICAS lesions on CCTA and QCA. The diagnostic values of the best CCTA and QCA descriptors were calculated for ICAS with FFR B 0.80. Of the 76 ICAS on CCTA, 52 (68 %) had a Ds % between 40 and 70 % on QCA. Significant intertechnique correlations were found between CCTA and QCA for MLD and Ds % (p\0.001). In 17 (33 %) of the 52 ICAS lesions on QCA, FFR values were B0.80. Calcification circumference extent (p = 0.50) and plaque composition assessment (p = 0.59) did not correlate with the hemodynamic significance. Best predictors for FFR B 0.80 stenosis were B1.35 mm MLD (82 % sensitivity, 66 % specificity), and B2.3 mm2 minimal lumen area (88 % sensitivity, 60 % specificity) on CCTA, and B1.1 mm MLD (59 % sensitivity, 77 % specificity) on QCA. Quantitative CCTA and QCA poorly predict hemodynamic significance of ICAS, though CCTA seems to have a better sensitivity than QCA. In this range of stenoses, additional functional evaluation is required. [less ▲]

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See detailMRI myocardial perfusion, a reliable alternative to FFR
GHEKIERE, Olivier; DEWILDE, W; HOA, D et al

Poster (2014, December)

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See detailImaging assessment of periaortic inflammation in Erdheim-Chester disease
COUVREUR, Thierry ULg; LIPCSEI, Györgyi; NCHIMI LONGANG, Alain ULg

in Aorta (2013), 1(2), 146-148

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See detailInvasive Evaluation of Coronary Arteries with Intermediate Stenosis at Coronary CT Angiography: Prevalence of Significant Findings
GHEKIERE, O.; DEWILDE, W; COOLEN, T et al

Poster (2011)

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See detailL'image du mois. La polykystose rénale autosomique dominante
Couvreur, Thierry ULg; Szepetiuk, G.; Meunier, Paul ULg et al

in Revue Médicale de Liège (2008), 63(11), 637-639

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See detailComment j'explore... les nodules pulmonaires de types verre depoli et mixte: une nouvelle semiologie tomodensitometrique de l'adenocarcinome pulmonaire.
Couvreur, Thierry ULg; Kerzmann, Arnaud ULg; Radermecker, Marc ULg et al

in Revue Médicale de Liège (2007), 62(7-8), 515-22

Recently a new computed tomography semiology of the pulmonary adenocarcinoma was highlighted. Studies on ground-glass nodule and on mixed nodule showed the relation between these radiological images and ... [more ▼]

Recently a new computed tomography semiology of the pulmonary adenocarcinoma was highlighted. Studies on ground-glass nodule and on mixed nodule showed the relation between these radiological images and the different anatomopathological forms of lung adenocarcinoma. Ground-glass opacity can correspond to precancerous lesions and morphological characteristics of nodules are correlated with the prognosis. The presence of spiculation, pleural retraction and air bronchogram is significantly more important in neoplasic lesions. The presence or the apparition of a solid component inside the nodule or the presence of indentation is highly suggestive of adenocarcinoma. A lesion smaller than 20 mm and persistant after 1 month must be, either followed up, or removed by a limited surgical resection. Lesions larger than 20 mm or associated with a solid component must be treated by conventional surgery. [less ▲]

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