Theoretical and experimental evaluation of continuous arterial spin labeling techniques
نویسندگان
چکیده
منابع مشابه
A theoretical and experimental comparison of continuous and pulsed arterial spin labeling techniques for quantitative perfusion imaging.
Under ideal conditions, continuous arterial spin labeling (ASL) techniques are higher in SNR than pulsed ASL techniques by a factor of e. Presented here is a direct theoretical and experimental comparison of continuous ASL and pulsed ASL, using versions of both that are amenable to multislice imaging and insensitive to variations in transit times (continuous ASL with a delay before imaging, and...
متن کاملTheoretical and experimental comparison of different techniques for continuous arterial spin labelling
Subjects and Methods: Four sequence variants are compared that differ only in the way the tag or control pulses are applied (see table). These four techniques were implemented on a Siemens Trio with an EPI-readout. Label and control mechanisms were simulated, varying all relevant parameters to optimize sequence settings of all measurements. In addition, the simulation results were used to estim...
متن کاملA theoretical and experimental investigation of the tagging efficiency of pseudocontinuous arterial spin labeling.
Arterial spin labeling (ASL) is capable of noninvasively measuring blood flow by magnetically tagging the protons in arterial blood, which has been conventionally achieved using instantaneous (PASL) or continuous (CASL) RF pulses. As an intermediate method, pseudocontinuous ASL (pCASL) utilizes a train of discrete RF pulses to mimic continuous tagging that is often unavailable on imagers due to...
متن کاملErratum to “Arterial Spin Labeling (ASL) fMRI: Advantages, Theoretical Constrains and Experimental Challenges in Neurosciences”
Cerebral blood flow (CBF) is a well-established correlate of brain function and therefore an essential parameter for studying the brain at both normal and diseased states. Arterial spin labeling (ASL) is a noninvasive fMRI technique that uses arterial water as an endogenous tracer to measure CBF. ASL provides reliable absolute quantification of CBF with higher spatial and temporal resolution th...
متن کاملPushing Transfer Insensitive Labeling Technique (TILT) from Pulsed Arterial Spin Labeling to Pulsed-Continuous Arterial Spin Labeling
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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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2010
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.22243