Image Storage Devices Research Articles

Cloud-Based Integrated Cross-Platform Regional Medical Image Cooperative Storage System

With the increasing volume of medical image data, efficient storage and retrieval of these images have become critical in the healthcare industry. This paper proposes an integrated cross-platform regional medical image cooperative storage system based on cloud computing. The system comprises a storage layer, a basic management layer, an application interface layer, and an access layer. The storage layer consists of medical image storage devices and a storage device management system. The basic management layer facilitates the collaborative operation of multiple storage devices within the medical image cloud storage. The application interface layer assigns permissions to users based on their needs. The access layer allows users to access the medical image cloud storage system. This system aims to provide a cost-effective, high-availability solution for storing and accessing a large volume of medical images. The research objective is to realize rapid storage and retrieval of medical images, satisfying the needs of healthcare professionals. The findings demonstrate the practical significance of the system and its potential to enhance medical image management.

Flexible, switchable and wearable image storage device based on light responsive textiles

Materials with reversible optical properties under light irradiation have great potential application in various optoelectronic fields. Particularly, photochromic materials have received extensive attention in many fields. Herein, a novel composite photochromic fabric was fabricated via Layer-by-Layer self-assembling of phosphomolybdic acid (PMoA) and polyacrylamide (PAM). Based on the established electron transfer photochromic system, the dynamic manipulation of photochromic behavior of the cotton fabric was achieved with outstanding fine high-resolution image under the visible light irradiation. The prepared fabric can change from colorless to blue rapidly (within 5 min) under UV light and maintain excellent reusability photochromic performance after more than 20 reversible color changing cycles, implying its great potential applications in the field of intelligent devices and UV detection in sunlight. Moreover, we constructed fabric weaving and developed a Quick Response (QR) code security identification to prove the practical application of the prepared photochromic fabric in the fields of wearable, optical information storage and information security encryption.

Room temperature optical image storage devices based on novel photo-responsive chiral azobenzene liquid crystal dopants

A room temperature optical image storage device based on a novel kind of chiral azobenzene liquid crystal compound (Azo-CC) dopant was reported in this paper, which could realize room temperature photocatalytic phase transition when doping in host liquid crystal E7. With a comparation of the referential achiral compound (Azo-ACC), the chemical structure, liquid crystalline and photoresponsive properties of the compounds were characterized by 1H-NMR, POM and UV–vis, respectively. The result showed that the compound with chiral group (Azo-CC) exhibited better photoresponsive properties than the referential achiral compound (Azo-ACC), indicating the introduction of chiral group is the key factor to provide E7 host room temperature photosensitive properties, which could not only made the liquid crystal molecular reoriented but also could change the whole nematic host liquid crystal to helical-twisted matrix. In addition, to understand the optical-switching behavior into detail, the photoisomerization dynamics of the systems o was also analyzed.

Synthesis and Characterization of Naphthalene‐Based Banana‐Shaped Liquid Crystals for Photoswitching Properties

AbstractA series of banana‐shaped monomers containing naphthalene as central units, azobenzene in side arms with terminal alkenes were synthesized and characterized. Polarizing optical microscopy, DSC and X‐ray diffraction measurements reveal that one compound processes a nematic phase while other four compounds exhibit B6 phase. The absorption spectrum of trans‐azobenzene displays high‐intensity π‐π* transition at 365 and low‐intensity n‐π* transition at 450 nm. These molecules exhibit strong photoisomerisation behaviour in solutions in which trans to cis isomerisation takes 55 seconds whereas reverse process takes about 32 hours. Such a long thermal back relaxation is useful for creation of optical image storage devices.

Preparation and Characterization of SnO2 Thin Film Coating using rf-Plasma Enhanced Reactive Thermal Evaporation

Abstract Due to high transparency and electrical conductivity, the transparent conductive glass applied in very large area like gas sensor, LCD, image storage device. It is also use in field of solar cell for both Si solar cell and Dye sensitized solar cell. Radio Frequency Plasma enhanced Reactive Thermal Evaporation method is used to fabricate the transparent conductive glass by coating of tin oxide on transparent glass. In this study on attempt has been made for SnO2 thin film coating using rf-PERTE with variation of oxygen partial pressure of 8×10 -4 mbar, 6×10 -4 mbar, 4×10 -4 mbar, with tin oxide boat voltage of 16 V, 20 V, 24 V and deposition time of tin oxide on the glass subtract 3 min, 10 min, 20 min and compare resistivity with commercial available ITO. The resistivity observed for thin film coated on lab and commercially available Indium coated ITO were 82.63/cm 2 and 1.191/cm 2 respectively.

A new method to measure the polymerization shrinkage kinetics of composites using a particle tracking method with computer vision

Objectives The aim of this study was to develop a new method to measure the polymerization shrinkage of light cured composites and to evaluate the overall utility and significance of the technique. Methods An optical instrument to measure the linear polymerization shrinkage of composites without directly contacting the specimen was developed using a particle tracking method with computer vision. The measurement system consisted of a CCD color video camera, a lens, an image storage device, and image processing and analysis software. The shrinkage kinetics of a commercial silorane-based composite (P90) and two conventional methacrylate-based composites (Z250 and a flowable Z350) were investigated and compared with the data measured using the “bonded disc method”. Results The linear shrinkage of the composites was 0.33–1.41%. The shrinkage value was lowest for the silorane-based (P90) composite and highest for the flowable Z350 composite. The estimated volume shrinkages of the materials were comparable to the axial shrinkages measured with the bonded disc method. Significance The new instrument was able to measure the true linear shrinkage of composites without sensitivity to the specimen geometry and the viscosity of the material. Therefore, this instrument can be used to characterize the shrinkage kinetics for a wide range of commercial and experimental visible-light-cure materials in relation to the composition and chemistry.

Synthesis and characterization of bent-shaped azobenzene monomers: Guest–host effects in liquid crystals with azo dyes for optical image storage devices

Six novel bent-shaped monomers were synthesized such as substituted/or non-substituted 1,3-phenylene bis-{4-[(4-allyloxy)phenylazo]benzoate} ( 4a– c) and substituted/or non-substituted 1,3-phenylene bis-{4-[3-(4-allyloxy-3-fluoro)phenylazo]benzoate} ( 4d– f) in which azobenzene moiety in the periphery and substituted/or non-substituted resorcinol as central unit with polymeriable double bonds are linked at both ends of all the molecules. The mesophase behavior was investigated using polarizing optical microscopy, DSC and XRD measurements. Four members of the family show an intercalated smectic (Sm intercal) phase and two were crystalline in nature. The trans-form of azo compounds ( 4a– f) showed a strong band in the UV region (355–366 nm), which was attributed to the π–π ∗ transition, and a weak band in the visible region at 455–465 nm due to the n–π ∗ transition. When one of the azo dye ( 4d) is mixed with liquid crystal as a guest, showed greater increase in thermal back relaxation time which is useful for creation of optical image storage devices.

The electro-optical and electrochromic properties of electrolyte-liquid crystal dispersions

Liquid crystals are known to exhibit a reversible color change by applying a direct current electric field, if a small amount of quaternary ammonium salts is dissolved into them. Applications of such an electrochromic liquid crystal cell have been proposed as interesting laser-addressed writing and image storage devices. Liquid crystal dispersions are composite materials formed by liquid crystal droplets embedded in either a polymer or a monomer matrix. Thin films of liquid crystal dispersions can be turned from an opaque to a transparent state by application of a suitable alternating current electric field. Herein, we report our investigations on electrolyte-liquid crystal dispersions, which show independent electro-optical and electrochromic properties characterized by fast bleaching times. This cell involves the reorientation of liquid crystal molecules, trapped in droplets, for the electro-optical changes from the opaque to transparent state and the formation of complexes at the cathode, between the positive ions of electrolyte and liquid crystal dispersed in the matrix, for the electrochromic changes from the bleached to colored state. The device is able to change its electro-optical transmittance within few milliseconds and its color within few seconds.

Ornamental image display and sound device

The present invention is an apparatus and method for presenting highly personal thoughts, sentiments, and engrams of a person in the form of a gift to a loved one. Feelings of an occasion or season are combined with a personal message through a representative embodiment of the season, for example, a Christmas ornament, having audio recording and image display devices therein. A simple photo transparency, such as a color slide, or other image storage device projects the donor's image onto a screen, either formed in a case of a predetermined theme, or onto a wall, thus allowing the donor to simply and easily incorporate his or her own image, and voice, in a personalized way.

Optical Accessibility of Light-Emissive Nanosilicon Memory

Optical memory functions in electroluminescence(EL)-emissive porous silicon (PS) diodes are described. The experimental PS diode is composed of an indium tin oxide (ITO) film, a PS layer, a p-type Si substrate and an Ohmic back contact. The PS layer was treated by rapid thermal oxidation (RTO) process. The RTO-PS diode shows stable on- and off-states which can be controlled by external bias voltages. The device can also store the optical information, and the stored information is erasable by photoillumination, since the bistable memory effect is based on field-induced hole injection and ejection into and from silicon nanocrystallites. The amount of the stored holes can be controlled by the incident light. The optical accessibility observed here suggests that the PS diode operates as a pixel-free image storage device.

Optical Accessibility of Light-Emissive Nanosilicon Memory

Optical memory functions in electroluminescence(EL)-emissive porous silicon (PS) diodes are described. The experimental PS diode is composed of an indium tin oxide (ITO) film, a PS layer, a p-type Si substrate and an Ohmic back contact. The PS layer was treated by rapid thermal oxidation (RTO) process. The RTO-PS diode shows stable on- and off-states which can be controlled by external bias voltages. The device can also store the optical information, and the stored information is erasable by photoillumination, since the bistable memory effect is based on field-induced hole injection and ejection into and from silicon nanocrystallites. The amount of the stored holes can be controlled by the incident light. The optical accessibility observed here suggests that the PS diode operates as a pixel-free image storage device.

Computer-generated graphical presentations: Use of multimedia to enhance communication

Personal computers may be used to create, store, and deliver graphical presentations. With computer-generated combinations of the five media (text, images, sound, video, and animation)—that is, multimedia presentations—the effectiveness of message delivery can be greatly increased. The basic tools are (1) a personal computer; (2) presentation software; and (3) a projector to enlarge the monitor images for audience viewing. Use of this new method has grown rapidly in the business-conference world, but has yet to gain widespread acceptance at medical meetings. We review herein the rationale for multimedia presentations in medicine (vis-à-vis traditional slide shows) as an improved means for increasing audience attention, comprehension, and retention. The evolution of multimedia is traced from earliest times to the present. The steps involved in making a multimedia presentation are summarized, emphasizing advances in technology that bring the new method within practical reach of busy physicians. Specific attention is given to software, digital image processing, storage devices, and delivery methods. Our development of a urology multimedia presentation—delivered May 4, 1996, before the Society for Urology and Engineering and now Internet-accessible at —was the impetus for this work.

Real time analysis of diffraction patterns, at extremely low light levels

By analyzing previous experiments with statistically independents photons, just one concerns the diffraction pattern; it was revealed with photographic technique. The present describes an experiment which produces a diffraction pattern at very low intensity radiation consisting of statistically independent photons. This pattern was revealed in real time by using image intensification. Several photodetection arrangements utilizing image intensifier tubes and image storage devices have been tested and the results presented. This study involved the evaluation of the error probability in photons overlap at any time. The linearity dependence between light intensity and bright pattern diffraction was verified.

Rotating specimen stage for angle-indexed videotape microscopy of automotive water-pump seals and ring-shaped specimens

Videocameras and electronic image storage devices have given new vigor and potential to optical microscopy and parts inspection, as well as a powerful means of recording microscopic motion in live-time biological studies. Video and electronic techniques permit fast exploratory examinations simultaneous with extensive archiving, and allow the option of deferring hard copy printing to the time when reports may be needed. These capabilities aid in improving the quality of scanning electron microscopy (SEM) and other analyses that may follow and have great value in communicating with the customer.Our modular system was conceived to permit the imaging of the entire surface of ring-type objects as well to certify that features later characterized in more detail by SEM have been well chosen. The system uses the Nikon SMZ-U optical microscope equipped with a current technology video camera used in combination with a commercial frame grabber device, a dye transfer printer, and VHS videotape recorder.

Picture archiving and communication systems: an overview.

Organizational techniques that enable small departments to function efficiently often fail as departments become larger. With the recent growth in imaging technology, the capacity of film-based systems to meet the increasing needs of radiology departments has decreased. Electronic picture archiving and communication systems (PACS) have been developed in an attempt to provide economical storage, rapid retrieval of images, access to images acquired with multiple modalities, and simultaneous access at multiple sites. Input to a PACS may come from digital or analog sources (when the latter have been digitized). A PACS consists primarily of an image acquisition device (an electronic gateway to the system), data management system (a specialized computer system that controls the flow of information on the network), image storage devices (both short- and long-term archives), transmission network (which serves local or wide areas), display stations (which include a computer, text monitor, image monitors, and a user interface), and devices to produce hard-copy images (currently, a multiformat or laser camera). The goals of PACS are to improve operational efficiency while maintaining or improving diagnostic ability.

ABSTRACTS (Chosen by G. Salton or V. Raghavan from 1983 issues of journals in the retrieval area)

This article outlines basic videodisc and optical disk technology. Both optical and capacitance videodisc technology are described. Optical disk technology as a mass digital image and data storage device is defined and briefly compared with other established information storage media including magnetic tape and microforms. The article includes a look into the future of videodisc and optical disk.

Basics of videodisc and optical disk technology.

This article outlines basic videodisc and optical disk technology. Both optical and capacitance videodisc technology are described. Optical disk technology as a mass digital image and data storage device is defined and briefly compared with other established information storage media including magnetic tape and microforms. The article includes a look into the future of videodisc and optical disk.

A peripheralized digital image management system: prospectus.

The number of diagnostic radiology examinations being performed on digitally formatted imaging equipment is continually increasing. However, most digital data are recorded as analogue images and the films stored in a central file. The dynamic range of raw digital data is lost. Currently, the space and cost requirements for storage of all digital data have discouraged most users from attempting it. This article presents the concepts and describes the requirements and initial fabrication of a system that will capture and retain all digital data using a network of peripheralized image acquisition, display, and storage devices. Any piece of digitally formatted equipment can be interfaced into the system. A real-time computer capability provides that any digital examination can be reviewed at any display station for up to 10 days.

The PROM - A Status Report

The PROM is a solid-state, rapidly recyclable, image storage device having a number of applications in image and signal processing. Some of its important characteristics include 1/10-wave optical surface quality, 100-1p/mm three-bar resolution, 10 ergs/cm2 light sensitivity, and image plane contrast of 10 4 :1. One of the unique features of the PROM is that the bias level of stored patterns can be adjusted through application of an external voltage, resulting in image contrast inversion or enhancement. This same operation (baseline subtraction) is used to null the zero order in an optical Fourier transform, achieving a Fourier plane signal-to-noise ratio approaching 106:1. This paper reports on the current status of this device and a number of applications for which it has been tested in several areas of image and signal processing. Results are shown for coherent optical processing by computer-controlled Fourier plane filtering and real-time image correlation, and signal processing systems are described which couple the PROM with an acousto-optic raster recorder to perform spectrum analysis and correlation on radio frequency signals.

Photoferroelectric effects in PLZT ceramics

A photoferroelectric effect described as photoassisted domain switching (PDS) is used to store high resolution, high contrast, non-volatile optical information, including gray-scale images in PLZT ceramics. Image storage is achieved by switching the ferroelectric remanent polarization while exposing the image on one of the indium tin oxide electroded surfaces of a PLZT plate, using near-UV light at the PLZT band gap energy (3.35 eV). PDS eliminates the photo-conductive films required in previous PLZT image storage devices. Some characteristics of the PDS effect which apply to image storage and selective erasure are described.