In vivo assessment of coronary stents with 64-row multidetector computed tomography: analysis of metal artifacts.

Abstract:

OBJECTIVE:To evaluate stent-induced artifacts by 64-row multidetector computed tomography (MDCT). METHODS:We studied 26 stented patients with MDCT before conventional coronary angiography (CCA). The CT values were measured. Stents were classified as occluded, with significant stenosis, with nonsignificant stenosis, or patent. For the patent stents, mean in-stent and out-stent CT values were compared; stents 3 mm or smaller were compared with stents larger than 3 mm. Multidetector CT was compared with CCA. RESULTS:We analyzed 42 stents. At CCA, 34 stents were patent, 5 were nonsignificantly stenosed, 1 was significantly stenosed, and 2 were occluded. At MDCT, 33 of 34 patent stents, 2 occluded stents, and 1 stent with significant stenosis were correctly diagnosed; nonsignificant stenoses were undetected, 1 patent stent was misdiagnosed as occluded (κ = 0.727). The out-stent CT value was lower than in-stent CT value both in stents 3 mm or smaller (P = 0.001) and stents larger than 3 mm (P < 0.001). The in-stent CT value of stents 3 mm or smaller was higher (P = 0.011) than that of stents larger than 3 mm. CONCLUSIONS:Metal artifacts cause overlooking of nonsignificant stenosis.

journal_name

J Comput Assist Tomogr

authors

Papini GD,Casolo F,Di Leo G,Briganti S,Fantoni C,Medda M,Inglese L,De Ambroggi L,Sardanelli F

doi

10.1097/RCT.0b013e3181ddbbc0

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

921-6

issue

6

eissn

0363-8715

issn

1532-3145

pii

00004728-201011000-00019

journal_volume

34

pub_type

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