New high-performance, safe MRI contrast agent for 3D vascular mapping Heart attack and stroke are the first and second leading causes of death in developed countries, respectively. As the disease often results in sudden death with few special prognostic symptoms, early diagnosis is very important. For this purpose, imaging techniques such as magnetic resonance imaging (MRI) are widely used to identify the narrowing or blockage of blood vessels. In MRI, contrast agents improve the visibility of the structures such as smaller blood vessels within the body. Just as satellites or global positioning systems (GPS) give traffic congestion information, the MRI contrast agents can give accurate information of vascular conditions such as vascular blockage and stenosis. Commonly used products are the gadolinium-based contrast agents. Free gadolinium ions have high toxicity, and thus they must be administered in chelated forms.