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MRI Applications: Classification According to Their Biodistribution,th a diameter of approximately 20–200 nm can be used as contrast agents for liver, lymphatic system (because of macrophage uptake, mainly as negative agent), or blood vessels (because of low extravasation, mainly as positive agent). The different kinds of mechanisms through which they affect the nuc首创精神 发表于 2025-3-25 13:03:47
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