…flow using PET Quantitative PET perfusion imaging offers precise measurements of myocardial blood flow in milliliters per minute per gram of tissue (mL/min/g)…

…characterized by angiography. Standard gray scale IVUS demonstrates the principal vessel wall layers and allows quantitative measurements of: minimum and maximum lumen diameter; lumen area…

…atrial cavities, vessels) should appear black in the image. If these spaces appear in any shade of gray, then the gain must be reduced. When…

…outcome trials as noninferior to FFR; enables hybrid gray zone strategies (measure FFR only when iFR/RFR is indeterminate). Resting resistance only approximates hyperemic resistance…

…nuances on the ultrasound image. The tissues in the ultrasound image are drawn with varying shades of one color (usually gray). This is possible because…