Quantification of liver perfusion using multidelay pseudocontinuous arterial spin labeling
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. ...
متن کاملPerfusion imaging using arterial spin labeling.
Arterial spin labeling is a magnetic resonance method for the measurement of cerebral blood flow. In its simplest form, the perfusion contrast in the images gathered by this technique comes from the subtraction of two successively acquired images: one with, and one without, proximal labeling of arterial water spins after a small delay time. Over the last decade, the method has moved from the ex...
متن کاملBreast Perfusion Imaging Using Arterial Spin Labeling
Delay 2 s Fig. 1. ASL experiment from a volunteer at 1.5T. (a) The imaging slice and labeling slab are depicted by yellow and blue boxes. (b) Fat-saturated SPGR image. Perfusion images are shown in (c-e) for delay times of 1 s, 1.5 s and 2 s. Arteries located close to the skin are depicted well; however, perfusion in glandular tissue is hardly visible. The yellow arrow shows an artery which doe...
متن کاملMagnetic resonance imaging quantification of pulmonary perfusion using calibrated arterial spin labeling.
UNLABELLED This demonstrates a MR imaging method to measure the spatial distribution of pulmonary blood flow in healthy subjects during normoxia (inspired O(2), fraction (F(I)O(2)) = 0.21) hypoxia (F(I)O(2) = 0.125), and hyperoxia (F(I)O(2) = 1.00). In addition, the physiological responses of the subject are monitored in the MR scan environment. MR images were obtained on a 1.5 T GE MRI scanner...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2015
ISSN: 1053-1807
DOI: 10.1002/jmri.25070