Extraordinary progress has been made over the last two decades in the development and dissemination of new medical imaging technologies. The development of computed tomography, positron emission tomography, and magnetic resonance imaging, as well as major innovations to the conventional imaging modalities, have revolutionized medical diagnostic imaging. Despite their many differences, all of these modalities can be viewed from a common perspective: being described in terms of the underlying physical properties imaged, the type of radiation/detection system used to produce the images, and the imaging performance the modality achieves--both in absolute terms and relative to that of a conceptual ideal observer.
Various image processing techniques and computer-aided diagnostic schemes for digital radiographic images are reviewed. Computer-aided schemes, which are in development at the Kurt Rossmann Laboratories for Radiologic Image Research of the University of Chicago, are in the fields of chest radiography, angiography, and mammography.
A radiology image management network connects together imaging equipment, display workstations, hardcopy units, electronic archiving systems, and department information management systems. The imaging equipment is connected to the network through image acquisition nodes. Image data is transmitted using a local area network. Images are displayed and manipulated on gray scale display workstations. Image data is stored at archiving nodes. Desired recordings of the image data are generated at hardcopy nodes. Patient data is acquired from the department or hospital information management system using gateways.
Just as newly invented photographic processes revolutionized the printing industry at the turn of the century, electronic imaging has affected almost every computer application today. To completely emulate traditionally mechanical means of information handling, computer based systems must be able to capture graphic images. Thus, there is a widespread need for the electronic camera, the digitizer, the input scanner. This paper will review how various types of input scanners are being used in many diverse applications. The following topics will be covered: - Historical overview of input scanners - New applications for scanners - Impact of scanning technology on select markets - Scanning systems issues
The graphic arts industry has been undergoing a quiet revolution as computerization and electronic imaging have invaded virtually every aspect of print production. Since this industry is one of the largest small businesses in the world (with over 54,400 establishments - over 85% of which employ less than 20 people) there are many opportunities for new development. The problem is, there is very little knowledge about what needs to be done. No area has been more severely impacted or offers the breadth of opportunity as the color prepress sector. This paper attempts to provide some insight and background in this exciting market sector, and offers some opinions as to how it will develop in the future.
Electronic printing in black and white has now come of age. Both high and low speed laser printers now heavily populate the electronic printing marketplace. On the high end of the market, the Xerox 9700 printer is the market dominator while the Canon LBP-SX and CX engines dominate the low end of the market. Clearly, laser printers are the predominant monochrome electronic printing technology. Ink jet is now beginning to engage the low end printer market but still fails to attain laser printer image quality. As yet, ink jet is not a serious contender for the substantial low end laser printer marketplace served by Apple Computer's LaserWriter II and Hewlett-Packard's LaserJet printers. Laser printing generally dominates because of its cost/performance as well as the reliability of the cartridge serviced low end printers.
Intelligent robotic systems utilize sensory information to perceive the nature of their work environment. Of the many sensor modalities, vision is recognized a one of the most important and cost-effective sensors utilized in practical systems. In this paper, we address the problem of designing vision systems to perform a variety of robotic inspection and manipulation tasks. We describe the nature and characteristics of the robotic task domain and discuss the computational hierarchy governing the process of scene interpretation. We also present a case study illustrating the design of a specific vision system developed for performing inspection and manipulation tasks associated with a control panel.
To review the current state of the art in a field maturing as fast as optical image correlators is a challenge. My apprehension is that I cannot possibly acknowledge all of the scientists and engineers who have contributed to the work that I am presenting.
The development of imaging spectrometer instrument systems over the past six years represents a major advance in multispectral remote sensing technology. These instruments, which collect hundreds of narrow, contiguous spectral bands simultaneously, provide remote sensing scientists with extremely detailed data related to the earth's surface. In addition to the technology advances represented by this type of remote sensing instrumentation, there is a concommitant requirement for technology development in the area of computational analysis of these high volume data sets. This paper reviews some critical aspects of both the instrument and processing technology involved with imaging spectrometry for remote sensing applications.
Current and near-term applications of flat panel display devices are considered in the context of various display type performance capabilities. Major market applications, as well as new or innovative applications are discussed.
High definition television (HDTV) is now being used to produce program material and will soon be available as a consumer product. This paper discusses the design of HDTV displays, the proposed signal transmission systems and the basic research in vision that can be used to improve the design in all aspects of the HDTV system.
Electronic still camera systems are now in the consumer market place. The hard copy image quality of these systems is poor in comparison with the ever improving photographic film systems. However, the rate at which solid state image sensor technology, signal processing technology, mass storage technology, and non-photographic hard copy technology are advancing indicates that these electronic still camera imaging systems will someday find a place alongside traditional photographic systems. The current and future status of these critical technologies is the subject of this paper.
We present a brief summary of the state of the art of high-bandwidth time-resolved electronic imaging applied to the measurement of single-transient events. A key subsystem of these instruments is the electron-tube based streak camera with a CCD imager readout. The new of streak camera/CCD imagers are evolving into very high-fidelity scientific instruments for the study of single-transient events. The capabilities of these new subsystems are summarized. Several applications of complete instrumentation systems for the time-resolved imaging of ionizing radiation events are presented. These applications range from imaging techniques that convert ionizing radiation to the optical domain through the radiation pumped flourescence of carefully chosen fluor materials to integrated-optic techniques that rely on sophisticated micro-fabrication of optical wave-guide devices. Included are applications of tomography that allow us to efficiently extend the information bandwidth of our measurement systems.