Fig. 1
From: Needle artifact reduction during interventional CT procedures using a silver filter
Metal artifacts from biopsy needles can obscure targets. In this example, a planning CT is shown on the left, and an intraprocedural CT fluoroscopy image on the right. The target is a 1.8 cm lymph node which is easily visualized on the left image (red arrow) but completely obscured by an artifact on the right. Interventional device artifacts commonly manifest themselves in this way, hindering both visualization of important anatomy that will be traversed by the needle, and localization of the target