Chung S. Leung

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PURPOSE There is debate in the literature on the role of high grade prostatic intraepithelial neoplasia as a risk factor for subsequent prostatic adenocarcinoma detection on prostatic needle biopsy. We determined whether high grade prostatic intraepithelial neoplasia on initial prostatic needle biopsy is an independent risk factor for prostatic(More)
PURPOSE Atypical small acinar proliferation can occur alone or with high grade prostatic intraepithelial neoplasia in either a discontinuous or contiguous pattern in a prostate needle biopsy. We assessed whether different subgroups of atypical small acinar proliferation and high grade prostatic intraepithelial neoplasia denote a differing risk of detecting(More)
In this correspondence, reconstruction of a uniformly sampled sequence from a nonuniformly sampled transient sequence using symmetric extension is described. First, a relationship between the discrete Fourier transform (DFT) of a uniformly sampled sequence and the DFT of a nonuniformly sampled sequence is obtained. From the relationship, the formula to(More)
Modulating the electric dipole field with ultrasound pulse, ultrasound current source density imaging (UCSDI) can detect current direction and form spatial 3D imaging of dipole changing in one period of treatment. As ultrasound pulse passes through the conductive media, it convolves/correlates with the inner product of the electric field of a dipole and(More)
Accurate 3-D mapping of multiple bioelectric sources in nerve fibers with high spatial resolution is challenging for the diagnosis and treatment of a variety of neural abnormalities. Ultrasound current source density imaging exploits the acoustoelectric (AE) effect, an interaction between electrical current and acoustic pressure waves propagating through a(More)
This paper outlines the operation principles with the piezo electric sensors for airport surface movement control. This type of sensor enables one not only to essentially reduce power consumption to a level acceptable by sustainable sensor network, but also to perform moving object detection on voltage impulse created by pressure from moving objects, as(More)
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