Components of acquisition-to-acquisition variance in continuous arterial spin labelling (CASL) imaging
نویسندگان
چکیده
منابع مشابه
In vivo Hadamard encoded continuous arterial spin labeling (H-CASL).
Continuous arterial spin labeling (CASL) measurements over a range of post-labeling delay (PLD) times can be interpreted to estimate cerebral blood flow (CBF) and arterial transit time (deltaa) with good spatial and temporal resolution. In this work, we present an in vivo demonstration of Hadamard-encoded continuous arterial spin labeling (H-CASL); an efficient method of imaging the inflow of s...
متن کاملAcquisition time and reproducibility of continuous arterial spin-labeling perfusion imaging at 3T.
Arterial spin-labeling (ASL) is a relatively new and noninvasive MR imaging technique, used to measure cerebral blood flow (CBF). Scanning time and reproducibility remain important issues in the clinical applicability of ASL. We expected both to benefit from higher field strengths. We describe that when performing ASL at 3T, 20 averages suffice to obtain steady and reproducible CBF values. Scan...
متن کاملImproved cardiac arterial spin labelling in the mouse heart by optimisation of acquisition and analysis
Methods Perfusion maps are generated by pixel-wise comparison of T1 maps from slice-selective and global inversion recoveries. T1 was quantified using ECG-gated LookLocker approach [3], with 4 lines of k-space acquired every heartbeat to speed up acquisition by approximately four times compared with previous approaches (eg. [2],[3]). A data logger (CED) was used to record ECG, RF and respiratio...
متن کاملCharacterizing the origin of the arterial spin labelling signal in MRI using a multiecho acquisition approach.
Arterial spin labelling (ASL) can noninvasively isolate the MR signal from arterial blood water that has flowed into the brain. In gray matter, the labelled bolus is dispersed within three main compartments during image acquisition: the intravascular compartment; intracellular tissue space; and the extracellular tissue space. Changes in the relative volumes of the extracellular and intracellula...
متن کاملCharacterising the Origin of the Arterial Spin Labelling Signal in MRI using a Multi-Echo Acquisition Approach
Introduction Arterial spin labelling (ASL) MRI [1] is increasingly being used to measure cerebral blood flow (CBF) non-invasively with good spatial and temporal resolution. However, it suffers from poor SNR and struggles to produce robust, reliable CBF estimates given the complexity of cerebral anatomy and the multifaceted nature of neuropathology. Understanding the complicated mechanisms under...
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ژورنال
عنوان ژورنال: BMC Neuroscience
سال: 2010
ISSN: 1471-2202
DOI: 10.1186/1471-2202-11-30