Diagnostic Value of 64-slice Multi-detector Row Cardiac CTA in Symptomatic Patients

Overview

Journal Eur Radiol

Specialty Radiology

Date 2006 Sep 30

PMID 17008986

Citations 24

Authors

Georg Muhlenbruch

Tobias Seyfarth

Chee Siong Soo

Namasivayam Pregalathan

Andreas Horst Mahnken

Affiliations

Soon will be listed here.

Abstract

Cardiac multi-detector-row computed tomography (MDCT) angiography has shown high levels of sensitivity and especially negative predictive value regarding the diagnosis of coronary artery disease (CAD). This study was designed to determine the value of a 64-slice-MDCT scanner in comparison to invasive coronary angiography for the detection of CAD in a population of symptomatic patients. Fifty-one patients with suspected CAD underwent conventional coronary angiography and ECG-gated cardiac 64-slice-MDCT angiography with a rotation time of 330 ms, a collimation of 64x0.6 mm and a slice thickness of 0.75 mm. Blinded patient- and segment-based analysis was performed for the detection of stenoses >or=70% of the vessel lumen. 95% of all coronary segments were assessable by MDCT angiography. Patient-based (segment-based) analysis revealed a sensitivity of 97.8% (86.7%), specificity of 50% (95.2%), positive predictive value of 93.6% (75.2%) and negative predictive value of 75% (97.7%). Inter-rater agreement revealed a kappa-value of 0.558 (0.722). In this symptomatic patient group a 64-slice-MDCT scanner shows good agreement on a segment-based analysis but only moderate agreement on a patient-based analysis. The diagnostic accuracy of 64-slice-MDCT coronary angiography is negatively influenced by the high pre-test probability of this symptomatic patient collective.

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