Sugimoto H, Tanaka O, Ohsawa T
Nihon Igaku Hoshasen Gakkai Zasshi. 1989 Aug 25;49(8):1067-9.
The uncomplicated bone necrosis is usually demarcated by reactive interface (RI). To analyze signal characteristics of RI, MR imaging of the hip was done using short TI IR (STIR) as well as short/long TR pulse sequences at 0.22 tesla. On STIR sequence the RI was observed as a high-signal line or ring with the shape identical to that of short TR image. The double line sign was not seen in early stage. The best explanation of high signal intensity of RI on STIR is that it has prolonged T1 and T2 secondary to high water content. It is concluded that STIR is an unique way to demonstrate RI in early osteonecrosis.
单纯性骨坏死通常由反应界面（RI）界定。为分析RI的信号特征，在0.22特斯拉磁场下，采用短TI反转恢复（STIR）序列以及短/长TR脉冲序列对髋关节进行磁共振成像。在STIR序列上，RI表现为高信号线或高信号环，其形态与短TR图像相同。早期未见双线征。RI在STIR序列上呈高信号强度的最佳解释是，由于含水量高，其T1和T2延长。结论是，STIR是显示早期骨坏死中RI的独特方法。
