Figure 5

Rest and Stress BOLD Images With Corresponding Subtraction Images. (A) The BOLD CMR images at rest and during adenosine stress together with the corresponding subtraction image and its parametric color map. A stress-induced signal loss in the anterior myocardial segment can be seen (white arrows). (B) Bull’s eye plot of the complete 3-dimensional data set of subtracted BOLD images showing a stress-inducible signal loss in the anterior segments. The color scale indicates the transmurality of the stress-induced signal loss (0 = no signal loss, 1 = 1% to 25%, 2 = 26% to 50%, 3 = 51% to 75%, 4 = 76% to 100% transmurality). BOLD = blood oxygen level–dependent; CMR = cardiovascular magnetic resonance; ΔSI = relative signal intensity changes of blood oxygen level–dependent cardiovascular magnetic resonance (from [36]).