Image Quality of Coronary 320-MDCT in Patients With Atrial Fibrillation: Initial Experience

Abstract

The analysis of our initial experience shows that imaging in patients with atrial fibrillation is possible using 320-MDCT, with images of most segments obtained being of diagnostic quality. Segment 15 was the most difficult to see on 320-MDCT because of the small caliber of the vessel; poor visualization of that segment mostly occurred in the setting of a dominant right coronary arterial system.

Non-invasive Evaluation of Internal Thoracic Artery Anastomosed to the Left Anterior Descending Artery with 320-Detector Row Computed Tomography and Adenosine Thallium-201 Myocardial Perfusion Scintigraphy

“…8) Further, this technique is expected to require lower contrast and radiation doses while maintaining excellent image quality as compared to 64-MDCT. 7,24) The use of an in situ ITA graft for repairing the LAD is widely accepted as a gold standard strategy that provides long-term patency and improves late survival. The patency rate has been shown to range from 85% to 95% at 7-10 years.…”

Diagnostic performance of 320-detector CT coronary angiography in patients with atrial fibrillation: preliminary results

“…Unlike standard helical imaging, there is no need to piece together image sub-volumes acquired over several heartbeats to reconstruct the entire cardiac volume. Furthermore, an arrhythmia rejection algorithm has been developed for 320-detector CTCA [17]. In patients with AF, the arrhythmia rejection algorithm may increase the reliability of imaging by extending the imaging time at the cost of an increased radiation dose.…”

“…In patients with heart rates above 65 bpm, 2 to 4-heart beat scan acquisition is performed with 2 to 4-segment reconstruction for improved temporal resolution [13,15]. Recent study has shown that CTCA is possible in patients with AF using 320-detector CT [17]. However, the diagnostic performance of 320-detector CTCA in patients with AF has not been assessed.…”

Koroner Arter Hastalığı

“…Son yapılan bir çalışmada 320 kesitli BT ile koroner anjiyografinin negatif prediktif değeri %100, >%50 koroner arter stenozunun tespiti için tanısal doğruluk oranı %95 olarak bulunmuştur [50]. Atriyal fibrilasyonu olan hastalarda 320 kesit BT ile tüm koroner segmentlerin %96'sı-nın vizüalize edildiği rapor edilmiştir [36,51]. Üç yüz yirmi kesitli BT'nin dezavantajları arasında koni ışın artefaktı, yüksek radyasyon dozu ve azalmış gantri hızı (350 ms) sayılabilir [36].…”