Results: the T1W imaging results of 6 cases show that GD - DTPA could greatly improve the demonstration of the brachial plexus both inside and outside the spinal canal part.

结果：6例增强后t 1w图象均表明GD - DTPA可明显增强臂丛神经的显示效果，特别是能改善对臂丛神经椎管外部分的显示。

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Objective:To provide anatomical basis for the amputation of nerval root of brachial plexus at external vertebral canal.

目的：为椎管外臂丛神经根切断术提供解剖学资料。

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