Real-time blood flow imaging using an autocalibrated spiral SENSE phase contrast technique achieved good agreement with fully-sampled data for velocity measurements.
Does an autocalibrated spiral SENSE method enable accurate real-time blood flow imaging without cardiac gating?
A novel autocalibrated spiral SENSE method enables accurate, real-time phase contrast imaging of blood flow without the need for cardiac gating.
A novel spiral phase contrast (PC) technique was developed for high temporal resolution imaging of blood flow without cardiac gating. An autocalibrated spiral sensitivity encoding (SENSE) method is introduced and used to reconstruct PC images. Numerical simulations and a flow phantom study were performed to validate the technique. To study the accuracy of the flow measurement in vivo, a high-resolution cardiac experiment was performed and a subset of undersampled SENSE reconstructed data were reconstructed. Good agreement between the velocity measurement from the fully-sampled and undersampled data was achieved. Real-time experiments were performed to measure blood velocity in the ascending aorta and aortic valve, and during a Valsalva maneuver. The results demonstrate the potential of this technique for real-time flow imaging.
Nezafat et al. (Thu,) reported a other. Autocalibrated spiral sensitivity encoding (SENSE) phase contrast imaging vs. Fully-sampled data was evaluated on Accuracy of flow measurement (velocity measurement agreement). Real-time blood flow imaging using an autocalibrated spiral SENSE phase contrast technique achieved good agreement with fully-sampled data for velocity measurements.