Pseudo-continuous arterial spin labeling technique for measuring CBF dynamics with high temporal resolution
نویسندگان
چکیده
منابع مشابه
Pseudo-continuous arterial spin labeling technique for measuring CBF dynamics with high temporal resolution.
Cerebral blood flow (CBF) can be measured noninvasively with nuclear magnetic resonance (NMR) by using arterial water as an endogenous perfusion tracer. However, the arterial spin labeling (ASL) techniques suffer from poor temporal resolution due to the need to wait for the exchange of labeled arterial spins with tissue spins to produce contrast. In this work, a new ASL technique is introduced,...
متن کاملMulti-Phase Pseudo-Continuous Arterial Spin Labeling (MP PCASL): Robust PCASL method for CBF quantification
FIG. 3. CBF maps from (a) PCASL and(b) 4-phase PCASL shows overall increase in CBF estimates with 4-phase PCASL. Phase tracking error map (c) show asymmetry of the errors induced at tagging locations. FIG. 4. Comparisons of gray matter CBF (red bar) and SNR efficiency (blue bar) normalized to the values from FAIR ASL. The error bars show the standard deviations. Multi-Phase Pseudo-Continuous Ar...
متن کاملQuantifying CBF with arterial spin labeling.
The basic principles of measuring cerebral blood flow (CBF) using arterial spin labeling (ASL) are reviewed. The measurement is modeled by treating the ASL method as a magnetic resonance imaging (MRI) version of a microsphere study, rather than a diffusible tracer study. This approach, particularly when applied to pulsed ASL (PASL) experiments, clarifies that absolute calibration of CBF primari...
متن کاملQuantitative basal CBF and CBF fMRI of rhesus monkeys using three-coil continuous arterial spin labeling.
A three-coil continuous arterial-spin-labeling technique with a separate neck labeling coil was implemented on a Siemens 3T Trio for quantitative cerebral blood flow (CBF) and CBF fMRI measurements in non-human primates (rhesus monkeys). The optimal labeling power was 2 W, labeling efficiency was 92+/-2%, and optimal post-labeling delay was 0.8 s. Gray matter (GM) and white matter (WM) were seg...
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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 1999
ISSN: 0740-3194,1522-2594
DOI: 10.1002/(sici)1522-2594(199909)42:3<425::aid-mrm3>3.0.co;2-s