The contrast agent was administrated through the ear venous with high-pressure syringe.

使用高压注射器由耳缘静脉注入对比剂。

The MR pulmonary perfusion imaging was achieved by the first-pass contrast agent method.

利用对比剂首次通过法可进行MR肺灌注成像。

Methods: To observe CT study of 868 patients who had been given nonionic contrast agent.

方法：通过对868例使用非离子造影剂患者的观察，分析其出现不良反应的概率和程度。

Objective It is to explore the diagnosis value of acoustic contrast agent for parotid tumor.

目的探讨超声造影剂诊断腮腺肿块的价值。

The magnetic particles not only act as an aide for transport, they are also a contrast agent for MRI.

这些磁性颗粒不仅作为转运的工具，而且是用于MRI的对比剂。