Arthrography

Japanese: 関節造影 - かんせつぞうえい（英語表記）arthrography

A technique for imaging inside joints that cannot be captured by ordinary X-rays. The main subjects of examination are articular cartilage, meniscal cartilage, ligaments, synovium, cartilaginous loose bodies, soft tissue tumors, etc. To image these tissues, there are two methods: one is to inject air or nitrogen gas, which has high X-ray transmittance, into the joint cavity to create contrast between the two (negative contrast agent), and the other is to inject a liquid, which has low transmittance, (positive contrast agent). There is also a method in which negative and positive contrast agents are injected simultaneously to obtain even better contrast (double contrast method).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

普通のX線写真では撮影できない関節内を写し出すための技術。主として検査の対象となるのは，関節軟骨，半月板軟骨，靱帯，滑膜，軟骨性の遊離体，軟部組織腫瘍などである。これらの組織を写し出すためには，X線の透過率の高い空気や窒素ガスなど(陰性造影剤)を関節腔内に注入して両者間にコントラストを生み出す方法と，逆に透過率の低い液体(陽性造影剤)を注入する方法とがある。また陰性と陽性の造影剤を同時に注入して，さらによいコントラストを得る方法(二重造影法)もある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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