Figure 1:

A schematic showing how KWIC filtering is used to synthetically replicate dual imaging. This is accomplished by multiplying the k-space in polar coordiates with two different KWIC filters. To accurately quantify AIF, images with TS=20 ms were reconstructed using a KWIC filter where the k-space center data was retained for the first ray and omitted for all the other rays (red). For myocardial wall enhancement assessment, images were reconstructed using another KWIC filter with TS = 80 ms, where the k-space center data was retained for the last fifteen rays and omitted for all the other rays (blue). Following CS reconstruction, AIF images with TS = 20 ms and wall enhancement images with TS = 80 ms are produced. For the KWIC filters, black and white correspond to zero and one, respectively.