Thin-section CT of lung without ECG gating: 64-detector row CT can markedly reduce cardiac motion artifact which can simulate lung lesions.

摘要: Abstract Purpose Motion artifacts, which can mimic thickened bronchial wall and the cystic appearance of bronchiectasis, constitute a potential pitfall in diagnosis interstitial or disease. Therefore, purpose our study was to evaluate whether 64-detector row CT (64-MDCT) enables reduction respiratory cardiac motion artifacts lung area on thin-section without ECG gating, examine correlation between artifact heart rate. Materials methods Thirty-two patients with suspected diffuse disease, who underwent both 8- 64-MDCT (gantry rotation time, 0.5 0.4 s, respectively), were included. The rates an additional 155 measured (range, 48–126 beats per minute; mean, 76 minute) immediately prior 64-MDCT, compared degree artifact. Two independent observers evaluated following monitor knowledge relevant clinical information: (1) images 1.25-mm thickness those 0.625-mm 32 patients; (2) patients. Results Interobserver agreement good evaluating 8-MDCT (weighted Kappa test, κ  = 0.61–0.71), fair poor other evaluations ( p Conclusion high temporal resolution appears reduce that affect scans parenchyma.