Acute lumen gain was lower for the bioresorbable scaffold by quantitative coronary angiography ( 1.15 mm vs 1.46 mm , p < 0.0001 ) and quantitative intravascular ultrasound ( 2.85 mm ( 2 ) vs 3.60 mm ( 2 ) , p < 0.0001 ) , resulting in a smaller lumen diameter or area post procedure .