Improved pseudo-continuous arterial spin labeling for mapping brain perfusion
نویسندگان
چکیده
منابع مشابه
Measurement of brain perfusion in newborns: Pulsed arterial spin labeling (PASL) versus pseudo-continuous arterial spin labeling (pCASL)
BACKGROUND Arterial spin labeling (ASL) perfusion-weighted imaging (PWI) by magnetic resonance imaging (MRI) has been shown to be useful for identifying asphyxiated newborns at risk of developing brain injury, whether or not therapeutic hypothermia was administered. However, this technique has been only rarely used in newborns until now, because of the challenges to obtain sufficient signal-to-...
متن کاملFeasibility of Using Pseudo-Continuous Arterial Spin Labeling Perfusion in a Geriatric Population at 1.5 Tesla.
OBJECTIVES To evaluate the feasibility of using pseudo-continuous arterial spin labeling (pCASL) perfusion in a geriatric population at 1.5-Tesla. MATERIALS AND METHODS In 17 participants (mean age 78.8±1.63 years) we assessed; 1) inter-session repeatability and reliability of resting state perfusion in 27 brain regions; 2) brain activation using finger-tapping as a means to evaluate the abil...
متن کاملEstimation of Pure Gray Matter Perfusion using Pseudo-continuous Arterial Spin Labeling and Partial Volume Correction
Introduction It is well-known that the reported cerebral blood flow (CBF) values in the human brain depend on the spatial resolution of the techniques, i.e. partial volume effects (PVE) between gray matter (GM) and white matter (WM). With typical spatial resolution used in MR perfusion imaging, the number of 100% GM voxels is very small with folding cortical layers of about 2-4mm thick. Therefo...
متن کاملReal-time functional MRI using pseudo-continuous arterial spin labeling.
The first implementation of real-time acquisition and analysis of arterial spin labeling-based functional magnetic resonance imaging time series is presented in this article. The implementation uses a pseudo-continuous labeling scheme followed by a spiral k-space acquisition trajectory. Real-time reconstruction of the images, preprocessing, and regression analysis of the functional magnetic res...
متن کاملReduced specific absorption rate (SAR) pseudo-continuous arterial spin labeling
Introduction: A reduced specific absorption rate (SAR) version of pseudo-continuous arterial spin labeling (pCASL) pulse sequence (1,2) is designed and implemented. Using a simulation study, a set of pCASL pulse sequence parameters is found that allows reducing the flip angle of pCASL radio frequency (RF) pulses (and consequently SAR) without losing the inversion efficiency. The proposed set of...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2010
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.22199