Can Anti-Scatter Grids Improve Image Quality in Breast CT

摘要: Dedicated CT imaging of the breast holds great promise for improving detection and diagnosis early stage cancer. However, before (CTBI) can become a clinical reality, it is imperative that issue image degradation due to rather large scattered radiation component be addressed. One approach reducing scatter in with use anti-scatter grids. This paper describes theoretical study analyzing ideal linear observer signal-to-noise ratio (SNR) achieved varying hypothetical Results suggest improvement performance grids attained if primary x-ray transmission high enough grid low enough. It shown 4 mm lesion dense (95% fibroglandular tissue), AUC (area under ROC curve) 80%, scatter-to-primary 5% would 99%, whereas no case 88%. Thus, this specific CTBI task, substantially outperform grid. Similar was observed microcalcifications.