Typical anatomical and flow-velocity encoded coronary images using magnetic resonance imaging at rest and with sequential isometric handgrip stresses in a healthy subject.

<p>In image (<b>A</b>), a scout scan obtained parallel to the RCA is shown together with the location for cross-sectional imaging (white line). (<b>B</b>) shows (white arrow) the region (corresponding to the cross-sectional location from A) that was selected for analysis at rest (<b>B</b>), during the first handgrip stress (<b>C</b>) and second handgrip stress (<b>D</b>). The white arrow in E shows a cross-section of the RCA that was selected for analysis of coronary flow velocity measures in the healthy volunteer. The signal intensity is proportional to flow velocity with a black signal indicating high velocity down through the imaging plane. In the view of the RCA (white arrow) at baseline (<b>E</b>) and during the first handgrip stress (<b>F</b>) and second handgrip stress (<b>G</b>) the change in luminal coronary signal intensity (increased blackness) indicates a proportional change in through-plane coronary flow velocity.