Comparison of pulsed and pseudocontinuous arterial spin-labeling for measuring CO2-induced cerebrovascular reactivity
نویسندگان
چکیده
منابع مشابه
Superselective pseudocontinuous arterial spin labeling.
A new technique for the imaging of flow territories of individual extra- and intracranial arteries is presented. The method is based on balanced pseudocontinuous arterial spin labeling but employs additional time-varying gradients in between the radiofrequency pulses of the long labeling train. The direction of the additional gradient vector is perpendicular to the selected artery and its azimu...
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A new signal-to-noise ratio (SNR) efficient method is introduced for the mapping of vascular territories based on pseudocontinuous arterial spin labeling (ASL). A pseudocontinuous tagging pulse train is modified using additional transverse gradient pulses and phase cycling to place some arteries in a tag condition, while others passing through the same tagging plane are in a control condition. ...
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imaging slab, Shadowed yellow: pTILT labeling slice, dashed yellow: TILT labeling slab, green: shimming volume. Fig.3: Simulated efficiencies as a function of velocity. T1 and T2 relaxations of blood are not considered in this simulation. Fig.4: top 2 rows: multislice perfusion maps by pTILT. Color map: CBF in mL/100mL/min. Last row: z-score activation map of the second row. Fig.1: MR pulse seq...
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BACKGROUND AND PURPOSE Arterial spin-labeling MR imaging permits safe, repeated CBF measurement. We investigated the potential and technical factors of arterial spin-labeling imaging in assessing cerebrovascular reactivity to acetazolamide. MATERIALS AND METHODS The regional CBF was measured in 8 healthy volunteers by use of a 3D pseudocontinuous arterial spin-labeling sequence. Arterial spin...
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Background: The cerebrovascular reactivity (CVR) results of blood oxygen level-dependent (BOLD) and arterial spin labeling (ASL) MRI studies performed in patients with cerebrovascular disease (steno-occlusive vascular disease or stroke) were systematically reviewed. Summary: Thirty-one articles were included. Twenty-three (74.2%) studies used BOLD MRI to evaluate the CVR, 4 (12.9%) studies used...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2012
ISSN: 1053-1807
DOI: 10.1002/jmri.23658