Pavlov H, Ghelman B, Warren R F
Radiology. 1979 Jan;130(1):87-95. doi: 10.1148/130.1.87.
Double-contrast arthrography using gravity provides more detail than single-contrast techniques. With gravity, air rises to the uppermost portion of the joint and the positive contrast material settles. The cartilagenous articular surfaces and the synovial lining of the elbow are coated with contrast material and highlighted by the intra-articular air. Cartilagenous intra-articular bodies can be identified and located and the size of cartilagenous encapsulated osseous bodies can be confirmed. This method is faster to perform and easier to interpret than single-contrast studies, exposes the patient less than a tomographic examination, and is helpful before surgical exploration.
利用重力的双对比关节造影比单对比技术能提供更多细节。借助重力作用，空气上升至关节的最上部，阳性对比剂沉降。肘关节的软骨关节面和滑膜衬里被对比剂覆盖，并因关节内空气而凸显出来。关节内软骨体能够被识别和定位，软骨包裹的骨体大小也能得到确认。这种方法比单对比研究执行起来更快，解读起来更容易，辐射剂量比断层检查少，并且在手术探查前很有帮助。
