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。
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。
Objective: To study THD possibility using organic silane attached magnetic iron oxide as an oral contrast agent for MR imaging.
目的：初步探讨有机硅烷化的磁性氧化铁颗粒作为口服磁共振造影剂进行腹部磁共振成像的可能性。
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