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PURPOSE The image noise and image quality of a prototype ultra-high-resolution computed tomography (U-HRCT) scanner was evaluated and compared with those of conventional high-resolution CT (C-HRCT) scanners. MATERIALS AND METHODS This study was approved by the institutional review board. A U-HRCT scanner prototype with 0.25 mm x 4 rows and operating at(More)
PURPOSE Many stereoscopic displays require glasses that are awkward or inappropriate for use in a neurosurgical operating room. A glass-free three-dimensional autostereoscopic display (3DAD) monitor was developed and tested for neurosurgical applications. METHODS Our 3DAD system uses images acquired from nine directions projected into the viewer's eyes(More)
prostaglandin J2 (15d-PGJ2), a metabolite of prostaglandin J, have been identified as ligands for peroxisome proliferator-activated receptor (PPAR) γ (Forman et al, 1995; Kliewer et al, 1995). PPARγ has been reported to play an important role in insulin sensitization and adipocyte (Chawla et al, 1994) and mon-ocyte/macrophage (Tontonoz et al, 1998; Pelton(More)
(18)F-2-deoxy-2-fluoro-glucose Positron Emission Tomography (FDG-PET) has been recently proposed as a promising cancer-screening test. However, the validity of FDG-PET in cancer screening has not been evaluated. We investigated the sensitivity of FDG-PET compared with upper gastric endoscopy in gastric cancer screening for asymptomatic individuals. A total(More)
In this paper, we propose a methodology (in the form of a software package) for automatic extraction of the cancerous nuclei in lung pathological color images. We first segment the images using an unsupervised Hopfield artificial neural network classifier and we label the segmented image based on chromaticity features and histogram analysis of the RGB color(More)