1. patients with stable angina pectoris with low to intermediate pre-test likelihood of cad;

2. no previous history of cad;

3. obstructive stenosis (≥50% luminal narrowing) on msct coronary angiography; 4.informed consent.

1. patients with a previous history of cad;

2. patients with contraindications for msct: a.cardiac rhythms other than sinus rhythm, b.pregnancy, c.allergy for contrast medium, d.renal failure (estimated glomerular filtration rate (egfr) < 50ml/min), e.resting heart rate >75 bpm plus contra-indications for beta-blockade, f. weight >100 kilograms;

3. contraindications for cardiac magnetic resonance (cmr) imaging: a.mr-incompatible implants, b. claustrophobia, c. contraindications for adenosine: i. known or suspected hypersensitivity to adenosine, ii. known or suspected bronchoconstrictive or bronchospastic disease, iii. 2nd or 3rd degree atrioventricular (av) block, iv. sinus bradycardia (heart rate < 45 bpm), v. systemic arterial hypotension (<90 mmhg).

d. contraindications for gadolinium: i. renal failure (estimated egfr <30 ml/min);

4. no informed consent.