Objective To evaluate the feasibility of reducing the contrast agent dose for renal artery MR angiography through changing K-space filling approach.

目的探索通过改变K空间填充方式来降低肾动脉MR扫描顺磁性造影剂剂量的可行性。

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Objective: to evaluate the clinical value of bolus injection with large dose of contrast agent by power injector on MR imaging of metastatic brain tumor and in application of MRA.

目的：探讨大剂量对比剂注射器团注在脑转移瘤及其血管成像中的临床意义。

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The secondary objective was to define the optimal dose of the second-generation contrast agent to routinely use in the CEUS examinations for endoleak detection.

第二个目的是确认在CEUS中常规使用的第二代造影剂用于内漏检测时候的合适的剂量。

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