Can I have an MRI after coronary stenting? This is a question that is often encountered during outpatient and inpatient department consultations. The essence of the question is related to the safety of MRI. In this regard, the Scientific Affirmation of Safety of MRI in Patients with Cardiovascular Device Implantation issued by the American Society for Diagnostic Cardiac Catheterization and Interventions led by several societies in 2007 and the Expert Consensus on Cardiovascular Magnetic Resonance led by the American College of Cardiology Foundation in 2010 elaborate on the above. In general, the safety of cardiac magnetic resonance (CMR) involves three main aspects: potential inhalants in the MRI room, cardiovascular implanted devices, and contrast agents. First, any ferromagnetic material should be strictly prohibited from entering the examination room. Second, radiofrequency pulses can cause a mild increase in the patient’s body temperature, which may affect the electronic components of the implanted device or cause the implanted lead to heat up and cause damage and malfunction of the implanted device. Currently, almost all cardiovascular implantable devices are made of non-magnetic or weakly magnetic materials. Coronary stents are mainly composed of 316L stainless steel, nickel, titanium, titanium alloy, nickel-titanium alloy, platinum and other components, which are non-magnetic or weakly magnetic substances. The consensus is that patients implanted with non-magnetic devices that do not contain electromagnetic components and do not generate heat from cardiac MRI can have a cardiac MRI scan immediately after implantation. In patients with weakly magnetic devices that require immediate post-implant cardiac MRI, clinicians should weigh the risks and benefits and consider whether it is necessary to delay the MRI scan. Implanted devices that are usually firmly anchored to the vessel wall and do not shift in a magnetic field include coronary and peripheral vascular stents, prosthetic heart valves and valvuloplasty rings, blocking umbrellas, left ear blockers, inferior vena cava filters, embolic spring coils, etc., and sternal fixation wires. For example, the forces exerted by magnetic fields on prosthetic valves are much lower than the impact forces generated by the beating, ejected blood of the heart, and studies have confirmed that surgical sutures hold valve annulus tissue in place with much greater forces than the magnetic induction forces generated by a 4.7 T field strength. In general, implanted coronary stents can be further firmly fixed by tissue growth at 6 to 8 weeks postoperatively, and it is safe for patients to perform cardiac MRI at 3.0 T and below at 6 to 8 weeks postoperatively. Limited clinical studies have also not found increased in-stent thrombosis, heat production, poor apposition, stent migration, or restenosis with CMR examinations. Retrospective studies have shown that cardiac MRI is similarly safe even when performed 2 weeks after coronary stenting. Therefore, the vast majority of tested coronary stents are relatively safe for MRI up to 3.0 T at any time after implantation and are labeled as “MR Safe”; the safety of CMR after untested coronary stents is labeled as “MR Conditional”, i.e., it needs to be determined on a case-by-case basis.