Fig. 1
Image acquisition (A) and image processing (B) for CINE-PC and RT-PC. (A) At the intracranial plane, CSF at the aqueduct is measured, while CSF at C2-C3 is measured at the extracranial plane. Amplitude images and phase-contrast images for both CINE-PC (left) and RT-PC (right) are presented. The FOV of RT-PC images was aligned with that of CINE-PC images for ease of comparison. (B) CSF post-processing and the first aim procedure at C2-C3 as an example. After the post-processing procedure (B1), flow rate signals (Qt) were obtained from CINE-PC and RT-PC (B2 and B3). The minimum values in each cardiac cycle (red points in B3) were used to segment the continuous Qt into multiple Qt. Then, all Qt were used to obtain the reconstructed Qt (B4). Finally, the differences in each parameter between the averaged Qt of CINE-PC and the reconstructed Qt of RT-PC were compared (B5). SV denotes average stroke volume