A micro vial assembly for performing microwave-assisted chemical reactions on small reaction mixture volumes is disclosed, wherein a reaction vessel is sealed through a diaphragm that is capped over an open end of the reaction vessel. The thrombus filter includes a body portion and a plurality of struts, each strut having a joined end and a free end. The coil arrangements preferably include butterfly coils and are arranged in such a way that they offer access to the patient and also allow the patient to be moved into and out of the imaging volume without interference by the RF coils.