UNLABELLED Ex vivo measurements in animals are used frequently in the field of nuclear medicine for the characterization of newly developed radioligands and for drug development. In vivo SPECT would replace these ex vivo measurements in a relatively large number of cases if one were able to adequately image small organs. The pinhole collimator has been used extensively to obtain greater detail ...

Abstract This paper investigates the erosion characteristics of soils using pinhole test. The tests were conducted with two undisturbed clay samples and five disturbed sandy soil samples. Based on test results, a process to analyze critical shear stress rate was proposed. result indicates that particle size distribution coefficient uniformity are significant factors affect soil. Samples grain r...

A hollow (concave) mask appears convex when viewed from beyond a certain distance even when viewed stereoscopically-this is the hollow-face illusion. At close viewing distances, the same mask is seen as hollow even when disparity information is eliminated by monocular viewing. A potential source of nonpictorial, monocular information that favors a veridical percept at close distances is accommo...

PURPOSE Traffic accidents are associated with the visual function of drivers, as well as many other factors. Driving simulator systems have the advantage of controlling for traffic- and automobile-related conditions, and using pinhole glasses can control the degree of concentric concentration of the visual field. We evaluated the effect of concentric constriction of the visual field on automobi...

We propose methods of enhancing pinhole-type integral imaging ray density, resolution, and expressible depth range using a color filter pinhole array on a liquid crystal display panel with a projection scheme. A color filter structure on a liquid crystal display panel acts as pinhole array in integral imaging with separation of color channels. In conventional pinhole-type integral imaging, the ...

Received 3/30/2009; revised 4/13/2009; accepted 4/21/2009. For correspondence and reprints contact: Chi-Yun Chen, M.D., Department of Nuclear Medicine, Antai Tian-Sheng Memorial Hospital. 210 Section 1, ChungCheng Road, Tungkang, Pingtung 92842, Taiwan. Tel: (886)8-8329966 ext. 1631, Fax: (886)8-8329977, E-mail: [email protected] Objective: The purpose of this study was to compare the image...

We propose the use of a pinhole-camera approach to make holograms. On recording the object beam passes through a pinhole, forming an image plane hologram, but on reconstruction the pinhole can be taken away. The reconstructed image can be programmed and processed by using optical information-processing elements placed in the position of the reconstructed pinhole or pinholes. Pinhole holography ...

We developed a new, to the best of our knowledge, test method to measure the wavefront error of the high-NA optics that is used to read the information on the high-capacity optical data storage devices. The main components are a pinhole point source and a Shack-Hartmann sensor. A pinhole generates the high-NA reference spherical wave, and a Shack-Hartmann sensor constructs the wavefront error o...

A recent key requirement in life sciences is the observation of biological processes in their natural in vivo context. However, imaging techniques that allow fast imaging with higher resolution in 3D thick specimens are still limited. Spinning disk confocal microscopy using a Yokogawa Confocal Scanner Unit, which offers high-speed multipoint confocal live imaging, has been found to have wide ut...

Pinhole castration is a novel minimally invasive procedure for calf or kid castration. We evaluated stress, simplicity and costs of the technique in mongrel puppies (N=15). The puppies were divided into three groups: control i.e. not treated; second surgical castration and third pinhole castration. Stress was monitored by daily recording of rectal temperatures and assay of plasma cortisol conce...