Magnetic Particle Imaging (MPI) is a new method for quantitative imaging of the local concentration of magnetic tracer materials. In general, the method has potential for various applications in medical imaging. However, applications like coronary and myocardial perfusion imaging in cardio-vascular can greatly benefit from the combination of high acquisition rates with quantitativeness and spatial resolutions in the mm range. The talk will provide an introduction into the basics of the method, present first results and will also aim at a comparison to other methods for medical imaging that are using contrast agents and tracer materials.