OBJECTIVE To assess the value of MicroPure, a new ultrasound image processing technique, in identifying microcalcifications (formed by monosodium urate crystals) in the first metatarsophalangeal joints attacked by gout compared to gray-scale ultrasound images. MATERIALS AND METHODS Thirty-six patients who fulfilled the study inclusion criteria underwent gray-scale ultrasound and MicroPure exa...

Background: Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility.Objective: An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan pro...

In quantum gray-scale image processing, the storage in quantum states is the color information and the position information According to the advantage of small range of the gray scale in a gray-scale image, a novel storage expression of quantum gray-scale image is proposed and demonstrated in this study. Besides, a new concept of "quantum pointer" is put forward based on the expression. Quantum...

OBJECTIVE This study was designed to determine whether hypnosis can modulate color perception. Such evidence would provide insight into the nature of hypnosis and its underlying mechanisms. METHOD Eight highly hypnotizable subjects were asked to see a color pattern in color, a similar gray-scale pattern in color, the color pattern as gray scale, and the gray-scale pattern as gray scale during...

The problem of optimal mapping of multi-level gray scale images to a coarser gray scale is formulated and explored. A distance between images having different intensity ranges is introduced. Minimization of such a distance can be viewed as least squares approximation of a source high range image by the best target image with a given number of levels of gray. Following S.Lloyd [1], we proved tha...

Introduction In 1986, O. J. Ginther stated that “gray-scale diagnostic ultrasonography is the most profound technological advance in the field of large animal research and clinical reproduction since the introduction of transrectal palpation and radioimmunoassay of circulating hormones.” (Ginther, 1986). Transition of ultrasound technology from a specialized research tool to a practical tool fo...