简介:MrSmithwasillandhewenttoseeadoctor.Thedoctoraskedhimtoputouthistongue(舌头),andthenhesaid,“OK.Youcanputyourtonguebacknow.There’snothingwrongwithyou,butI’mafraidyouhaveaproblem:youseldomtakeexercise.”。“But,doctor.”MrSmithsaid,“Idon’tthinkso.”“Don’ttellmewhatyouthink,“thedoctorsaid.“Iknowwhatyonneed.
简介:摘要目的比较离子型与非离子型两种对比剂在肝脏MR动态增强中的效果和不良反应,探讨两种对比剂的应用价值。