Clinical acceptance of PACS is predicated upon maximum uptime. Upon component failure, detection, diagnosis, reconfiguration and repair must occur immediately. Our current PACS network is large, heterogeneous, complex...
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ISBN:
(纸本)0819408069
Clinical acceptance of PACS is predicated upon maximum uptime. Upon component failure, detection, diagnosis, reconfiguration and repair must occur immediately. Our current PACS network is large, heterogeneous, complex and wide-spread geographically. The overwhelming number of network devices, computers and software processes involved in a departmental or inter-institutional PACS makes development of tools for network and resource management critical. The authors have developed and implemented a comprehensive solution (PACS Network-Resource Manager) using the OSI Network Management Framework with network element agents that respond to queries and commands for network management stations. Managed resources include: communication protocol layers for Ethernet, FDDI and UltraNet;network devices;computer and operating system resources;and application, database and network services. The Network-Resource Manager is currently being used for warning, fault, security violation and configuration modification event notification. Analysis, automation and control applications have been added so that PACS resources can be dynamically reconfigured and so that users are notified when active involvement is required. Custom data and error logging have been implemented that allow statistics for each PACS subsystem to be charted for performance data. The Network-Resource Manager allows our departmental PACS system to be monitored continuously and thoroughly, with a minimal amount of personal involvement and time.
The proceedings contain 54 papers. The topic discussed include: global optimization using the y-ybar diagram;two-mirror projection systems for simulating telescopes;two-mirror projection systems for simulating telesco...
The proceedings contain 54 papers. The topic discussed include: global optimization using the y-ybar diagram;two-mirror projection systems for simulating telescopes;two-mirror projection systems for simulating telescopes;surface contributions of the wave aberrations up to the eighth degree;membrane light modulators: engineeringdesign considerations;plastic lens array with the function of forming unit magnification erect image using roof prisms;spatial frequency selective error sensing for space-based, wide field-of-view, multiple-aperture imaging systems;novel interferometer setup for evaluating the sum of surface contributions to transmitted wavefront distortion;and alignment of an aspheric mirror subsystem for an advanced infrared catadioptric system.
Geometric parameters such as fill-factor, pixel shape, and array symmetry strongly affect the performance of membrane light modulators. A set of modeling tools that allow device performance evaluation as a function of...
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ISBN:
(纸本)0819406554
Geometric parameters such as fill-factor, pixel shape, and array symmetry strongly affect the performance of membrane light modulators. A set of modeling tools that allow device performance evaluation as a function of these parameters have been developed. The models predict the effect of varying a given parameter and allow visualization of the result. The current modeling results are in good agreement with experimental observation and have formed the basis for computer-aided design of future generations of such devices.
An analysis of the measuring accuracy that can be obtained using critical angle refractometry as a direct and an indirect method is made. The working conditions required to get the highest accuracy are discussed.
ISBN:
(纸本)0819406554
An analysis of the measuring accuracy that can be obtained using critical angle refractometry as a direct and an indirect method is made. The working conditions required to get the highest accuracy are discussed.
Mathematical expressions are presented to relate object and image plane tilts in nonaxially symmetric systems. Examples that illustrate the use of these expressions are given. Keystone distortion is described and quan...
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ISBN:
(纸本)0819406554
Mathematical expressions are presented to relate object and image plane tilts in nonaxially symmetric systems. Examples that illustrate the use of these expressions are given. Keystone distortion is described and quantified as a function of image plane tilt.
The expressions of the Seidel aberration theory are comparatively simple and easy to use due to its characteristics and prerequisites. Meanwhile, the effective range of the theory is limited also due to its prerequisi...
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ISBN:
(纸本)0819406554
The expressions of the Seidel aberration theory are comparatively simple and easy to use due to its characteristics and prerequisites. Meanwhile, the effective range of the theory is limited also due to its prerequisites. The possibility for enlarging its effective range is analyzed in this paper.
It has been shown that the Admittance Diagram along with the Quarterwave Rule can be used in the design and characterization of optical thin film coatings. However, this same tool may be utilized in the design and cha...
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ISBN:
(纸本)0819406554
It has been shown that the Admittance Diagram along with the Quarterwave Rule can be used in the design and characterization of optical thin film coatings. However, this same tool may be utilized in the design and characterization of some microwave components as well. A simple design example of a Wilkinson power divider is presented to illustrate the utility of this optical technique for microwave circuit design and analysis.
The techniques used for the analysis of thermally induced structural distortions of optical components such as scanning mirrors and telescope optics are outlined. Particular attention is given to the methodology used ...
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ISBN:
(纸本)0819406554
The techniques used for the analysis of thermally induced structural distortions of optical components such as scanning mirrors and telescope optics are outlined. Particular attention is given to the methodology used in the thermal and structural analysis of the GOES scan mirror, the optical analysis using Zernike coefficients, and the optical system performance evaluation. It is pointed out that the use of Zernike coefficients allows an accurate, effective, and simple linkage between thermal/mechanical effects and the opticaldesign.
A novel concept on the construction of high-resolution objectives is outlined. Although similar to binary optics technology, this approach brings additional degrees of freedom to the opticaldesign as far as achieving...
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ISBN:
(纸本)0819406554
A novel concept on the construction of high-resolution objectives is outlined. Although similar to binary optics technology, this approach brings additional degrees of freedom to the opticaldesign as far as achieving a finer balance of phase curvature via refractive properties and relative thickness of the multilayer stack. The differential coating objective can be used in conjunction with diffractive surfaces to optimize the transmission efficiency and control the secondary spectrum correction. The basic equations describing the monochromatic and three- color achromat predesign are presented.
The revisions of enlarging all the aberrations related to aperture to the seventh order for the Seidel aberration theory have been proposed in this paper. The practice of the revised theory in the range of small viewi...
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ISBN:
(纸本)0819406554
The revisions of enlarging all the aberrations related to aperture to the seventh order for the Seidel aberration theory have been proposed in this paper. The practice of the revised theory in the range of small viewing field and large aperture (for example, the lens of microscope and telescope) has proven that the theory is applicable in this scale.
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