Coronary Atherosclerosis T1-Weighted Characterization (CATCH)

Inclusion:

* Healthy Volunteers: male or female ≥ 18 years of age with a BMI\<30, with no history of cardiovascular disease
* Patients: Medically stable, male or female ≥ 18 years of age who is have not suspected of having or has been diagnosed with coronary artery disease and undergone stenting or bypass surgery

Exclusion:

* Contraindications to MR imaging including mechanically, magnetically, or electrically activated implants, ferromagnetic implants and ferromagnetic foreign bodies, pregnancy.
* Inability to tolerate MR imaging secondary to an inability to hold breath for a short time or have claustrophobia.
* Non-compliant with visit instructions, including following procedure instructions
* Severe allergy to animal dander or animal-instigated asthma
* Specific to gadolinium-based contrast agents: Renal function test does not meet CSMC standard of care MRI contrast protocol requirements (GFR \<45ml/min) or previous allergic reaction to gadolinium-based contrast agents.\*
* Volunteers who have had four or more prior previous gadolinium contrast scan