Shih-Jen Wang

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OBJECTIVE To extract accurate image-derived input functions from dynamic brain positron emission tomography images (DBPIs) using independent component analysis (ICA). METHODS A modified linear model with haematocrit correction was used to improve the accuracy of input functions estimated by independent component analysis and to reduce the error of(More)
UNLABELLED 2-Deoxy-2-[(18)F]fluoro-d-glucose ([(18)F]FDG), [(18)F]fluoroacetate ([(18)F]FAc) and [(18)F]fluoromisonidazole ([(18)F]FMISO) were all considered to be positron emission tomography (PET) probes for tumor diagnosis, though based on different rationale of tissue uptake. This study compared the biodistribution, pharmacokinetics and imaging of these(More)
Received 7/24/2006; revised 7/31/2006; accepted 8/11/2006. For correspondence or reprints contact: Hung-Yi Su, M.D., Department of Nuclear Medicine, Taipei Veterans General Hospital. 201 Section 2, Shih-Pai Road, Taipei 112, Taiwan. Tel: (886)2-28757301, Fax: (886)2-28715849, E-mail: Backgrounds: Cardiac phantom studies utilized to(More)
This paper proposed a superresolution (SR) reconstruction method by combining the cross-diamond-hexagonal search (CDHS) block-matching algorithm (BMA) and the simple block-wise motion vector selection (BWMVS) strategy to obtain stable and high quality reconstruction results. The experimental results showed that the reconstruction quality of CDHS BMA is(More)
Autosomal dominant polycystic kidney disease is a systemic hereditary disease characterized by renal cysts and sometimes involvement of the liver. We present a 65-year-old woman with autosomal dominant polycystic kidney disease on regularly hemodialysis who recently experienced intermittent right upper quadrant abdominal pain and elevated intact parathyroid(More)
Gorham's disease is a rare disorder characterized by proliferation of vascular channels. The clinical presentation of Gorham's disease is variable and depends on the site of involvement. A high index of clinical suspicion is needed for accurate diagnosis, and recognition of distinctive radiologic and histopathologic features can help facilitate and expedite(More)
In this paper, a simple block-wise motion vector selection (BWMVS) strategy was incorporated into the motion estimation algorithm. The occlusion that severely damages the quality of the reconstructed video sequence in superresolution (SR) problem is effectively removed. The stability due to the BWMVS could be seen from the reconstruction results in(More)
Based on the Huber-Markov random field (HMRF), this paper adopts the cross-diamond-hexagonal search (CDHS) blocking-matching algorithm to promote the speed of motion estimation in the maximum a posteriori (MAP)-based super resolution (SR) reconstruction. A block-wised motion vector selection (MVS) strategy is proposed to eliminate the unqualified motion(More)
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