Fig. 2.

Scatter diagram plotting the ipsilateral-to-contralateral ratio of ¹⁸F- FPYBF-2 distribution volume ratio (DVR) against the ipsilateral-to-contralateral ratio of oxygen extraction fraction (OEF). Triangles indicate patients with left artery diseases and circles indicate patients with right artery diseases. Red symbols indicate patients with an increased OEF ratio and an increased DVR ratio, a green symbol indicates a patient with an increased OEF ratio and a normal DVR ratio, blue symbols indicates patients with a normal OEF ratio and a decreased DVR ratio, white symbols indicate patients with a normal OEF ratio and a normal DVR ratio. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)