MR Single Shot Fast Spin Echo ARFI

Andrew B. Holbrook¹, Pauline W. Worters¹, Brian A. Hargreaves¹, Kim Butts Pauly¹

MR acoustic radiation force imaging (MR-ARFI) has been shown to be a means of visualizing high intensity focused ultrasound (HIFU) focal locations without the need for applying extensive energy with a thermal test spot. To reduce geometry distortion and improve the registration of ARFI localization compared to collected scout images, we demonstrate a modified rFOV single shot FSE (ssFSE) MR-ARFI pulse sequence. In ssFSE, the phase from the displacement manifests itself as rings of destructive cancellations in the magnitude of the MRI image and is thus easily visualized. We present initial results in phantom experiments.