The DWI protocol can be used with a variety of MRI pulse sequences, including fast spin echo single shot, high-speed STEAM (stimulated echo acquisition mode) imaging, incoherent gradient echo, magnetization prepared rapid gradient echo, echo-planar imaging and navigator echo.
Echo-planar imaging (EPI) standard Spin echo with a train of gradient echoes.
Echo-planar imaging can be performed as a single shot, during which all data is gathered and processed in a single acquisition, or as a "multishot" where data is gathered in several individual segments.
Endpoints will include infarct growth measured by echo-planar imaging
capability for performance of MRI; gradient recalled echo (GRE), diffusion-weighted imaging (DWI) / apparent diffusion coefficient (ADC), perfusion-weighted imaging (PWI), fluid-attenuated inversion-recovery (FLAIR), and intracranial MRA.
At this performance level, the Ultra offers clinical capabilities that are comparable to those of more costly high-field systems, and allows the application of high-field imaging techniques, such as Single-shot Echo-planar Imaging
(EPI) Diffusion, True SSFP, SuperFASE and Black Blood MR Angiography.
Altaire has a powerful gradient system that delivers 22mT/m gradient amplitude and 55T/m/s slew rate, enabling Altaire to perform advanced clinical imaging techniques such as Echo-Planar Imaging
(EPI)-based Diffusion-Weighted Imaging; MR Angiography including contrast enhanced MRA (CE-MRA); ultra fast-scanning techniques such as single-shot and multi-shot EPI; and RF fat saturation.
These performance enhancements include Echo-Planar Imaging
(EPI)-based Diffusion-Weighted Imaging that is useful in the diagnosis of acute ischemia and other neurological disorders; Contrast-Enhanced MR Angiography appropriate for vascular studies; and FatSep(TM), a fat suppression technique for enhancing the visualization of musculoskeletal anatomy.