Home › Words › I › isoattenuationisoattenuationisoattenuation means attenuation of an object of interest to the same extent as the background tissue (such that it does not show up on an X-ray image).EtymologyFrom iso- + attenuation.nounattenuation of an object of interest to the same extent as the background tissue (such that it does not show up on an X-ray image)Definitions & examples from Wiktionary (CC BY-SA 3.0).