新作坊 Humanity Innovation and Social Practice

Normalized metal artifact reduction (NMAR) in computed tomography

摘要：

Purpose: While modern clinical CTscanners under normal circumstances produce high quality images, severe artifacts degrade the image quality and the diagnostic value if metal prostheses or other metal objects are present in the field of measurement. Standard methods for metal artifact reduction (MAR) replace those parts of the projection data that are affected by metal (the so-called metal trace or metal shadow) by interpolation. However, while sinograminterpolation methods efficiently remove metal artifacts, new artifacts are ...