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Usefulness of measuring coronary lumen density with multi-slice computed tomography to detect in-stent restenosis.

Abstract：

BACKGROUND:A method to objectively detect in-stent restenosis (ISR) with multi-slice computed tomography (MSCT) has not been established yet. We aimed to evaluate the usefulness of measuring coronary lumen density with MSCT to detect ISR. METHODS:Forty-seven coronary stented lesions in 38 patients were evaluated with 16-slice CT (collimation thickness, 0.625 mm). In each assessable lesion, the stent lumen was visually evaluated, and reference CT density proximal to the stent (RCTD) and minimum CT density of the in-stent lumen (SCTD) were measured. ISR was defined as >50% diameter stenosis measured by quantitative coronary angiography (QCA). RESULTS:Of 47 stented lesions, 35 (74%) were assessable, and there were 12 ISR (+) and 23 ISR (-) lesions. Mean DeltaCTD (RCTD-SCTD) of the ISR (+) group was significantly greater than that of the ISR (-) group (196+/-101 vs. 7+/-30 HU, p<0.001). Predictive accuracy of quantitative evaluation of ISR using our best cutoff value of DeltaCTD was higher than that of visual evaluation (97% vs. 83%, p<0.05). The DeltaCTD showed a higher correlation with percent diameter stenosis (r=0.85, p<0.001) than with SCTD (r=-0.73, p<0.001). CONCLUSIONS:Measuring differences of CT densities between reference vessel lumens and in-stent lumens using MSCT is a convenient and useful technique to detect ISR.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Kitagawa T,Yamamoto H,Horiguchi J,Hirai N,Fujii T,Ito K,Kohno N

doi

10.1016/j.ijcard.2006.11.231

subject

Has Abstract

pub_date

2008-02-29 00:00:00

pages

239-43

issue

2

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(07)00266-5

journal_volume

124

pub_type

信件

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