1) contrast for MRI 磁共振对比剂 1. Objective:To study the toxicity of superparamagnetic nanometer r Fe granule liposome,a new typecontrast for MRI. 目的:研究新型磁共振对比剂超顺磁r Fe(spr Fe)纳米微粒毒性。 更多例句>> 2) Contrast-enhancing agent ...