A white insoluble radiopaque powder used as a pigment .
一种白色不可溶粉末，不透射线，用作一种色素。
Examination of the interior of a joint using x-rays following the injection of a radiopaque substance .
关节造影术注入射线透不过的物质后，用x光对关节内部进行的检查。
Plain technique : useful to check settings ; reveal radiopaque uroliths either in the bladder or urethra ; an enlarged prostate or emphysematous cystitis .
单纯技术：方便检查拍摄条件；显示在膀胱或尿道中辐射透不过的尿结石；增大的前列腺或气肿性膀胱炎。
Percutaneous placement of radiopaque markers at the pedicle of interest for preoperative localization of thoracic spine level .
