Ömer YILMAZ, Meltem ÇETİN, Mahmut DUYMUŞ, Mustafa KAYAN, Mehmet MUNDUZ, Selçuk YAŞAR, Yasin TÜRKER

Evaluation of atherosclerotic plaque, coronary stent and coronary by-pass grafts with 128-slice ct and technical optimization: Our single center experiences

Bu çalışmanın amacı native koroner arter, koroner aterosklerotik plak, koroner by-pass greft ve koroner stentleri 128 sıralı BT ile değerlendirmek, sonuçları literatur verileri ile karşılaştırmak ve teknik optimizasyondur. 150 hastanın koroner arterleri tespit edilebilirlik, aterosklerotik plak karakterizasyonu, by-pass greft ve stent patensisi açısından 128 sıralı BT kullanılarak değerlendirildi. Her vakada koroner arterler AHA (American Heart Association) sınıflandırması temel alınarak 15 segmente ayrıldı ve değerlendirildi. AHA sınıflandırmasına gore 150 vakanın, 2250 koroner arter segmenti değerlendirildi. 2 mm nin altındaki 1045 segment tespit edilebilirlik için değerlendirildi. 50 segment visualize edilemedi. 97 vakada yumuşak plak gözlendi ( 4 vakada cal- siyum skoru=0). 450 segmentte aterosklerotik plak gözlendi. 10 vakada by-pass grefti, 15 vakada 28 stent gözlendi. By-pass greftli vakalarda klipslere bağlı artefaktlar değerlendirmeyi etkilemedi. Teknolojik gelişmeler sayesinde koroner arterler çok dedektörlü bilgisayarlı tomografiler kullanılarak non-invaziv şekilde değerlendirilebilmektedir. Çok dedektörlü bilgisayarlı tomografilerle sağlanan yüksek uzaysal ve temporal rezolüsyon sayesinde koroner stentlerin ve by-pass greftlerin klips artefaktları görüntülerde artefakta neden olmamaktadır.

Aterosklerotik plak, koroner stent ve koroner by-pass greftlerin 128 sıralı bt ıle değerlendirilmesi ve teknik optimizasyon: Tek merkezli tecrübemiz

The purpose of this study was to evaluate the native coronary artery (CA), coronary atherosclerotic plaque, coronary by-pass grafts and coronary stents with 128-slice CT, comparison of findings with literature and technical optimization. In one hundred fifty patients who had undergone coronary computerized tomography angiography using 128-slice CT (CCTA), CAs were examined in terms of visibility, atherosclerotic plaque characteristics, by-pass graft and stent patency. In each case, CAs were divided into fifteen segments according to the American Heart Association (AHA) classification and then evaluated. Out of one hundred and fifty (150) cases, 2250 CA segments were examined according to AHA classification. A total of 1045 segments below 2 mm were examined for visibility. Fifty segments could not be visualized. Soft plaques were observed in 97 cases (4 cases with calcium load = 0). Atherosclerotic plaques were observed in 450 segments. By-pass grafts were observed in ten cases while 28 stents were observed in fifteen cases. In cases with by-pass graft, artifacts due to clips did not hinder the examination. In conjunction with technological advances, CAs can be non-invasively examined using new generation multi-dimensional computerized tomography. Clips artifacts in coronary stents and by-pass grafts do not hinder CA examination due to high spatial and temporal resolution of MDCT devices.

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