Elsie Wong

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Studies of visual function in behaving subjects require that stimuli be positioned reliably on the retina in the presence of eye movements. Fixational eye movements scatter stimuli about the retina, inflating estimates of receptive field dimensions, reducing estimates of peak responses, and blurring maps of receptive field subregions. Scleral search coils(More)
Arterial spin labeling (ASL) has been developed as a useful tool for measuring local tissue perfusion with magnetic resonance imaging (MRI). In contrast to conventional ASL that spatially labels spins, velocity-selective ASL (VS-ASL) tags spins on a basis of flow velocity. Using a 90 degrees-180 degrees-90 degrees radiofrequency pulse train in combination(More)
Arterial spin labeling (ASL) has been developed into a useful tool for measuring local tissue perfusion with magnetic resonance imaging (MRI). Velocity-selective ASL (VS-ASL) tags spins on a basis of flow velocity, instead of the spatial distribution that is commonly used by conventional ASL techniques. Using a 90 degrees-180 degrees-90 degrees(More)
Helical tomotherapy is a new form of image-guided radiation therapy that combines features of a linear accelerator and a helical computed tomography (CT) scanner. Megavoltage CT (MVCT) data allow the verification and correction of patient setup on the couch by comparison and image registration with the kilovoltage CT multi-slice images used for treatment(More)
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