Toshiba TDF-500 High Resolution Viewing And Analysis System

Roberts, Barry A.; Kakegawa, Mitsuo; Nishikawa, Masashi; Oikawa, D.

doi:10.1117/12.968728

Cited by 3 publications

(2 citation statements)

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“…PACS researchers are challenged by the fact that the image data to be handled by a PACS is voluminous and the response time required by radiologists is very short, less than 2 seconds [5]. Several promising solutions have been proposed to achieve the required system performance, such as distributed database design [4], high-capacity fiber-optical networks, highcapacity/fast data storage systems [2], special workstations [8], etc. In addition, we herein propose an expert system for image retrieval, Image Retrieval Expert System (IRES), to meet the response time requirement , considering a reasonable cost/performance tradeoff.…”

Section: Introductionmentioning

confidence: 99%

<title>IRES: image retrieval expert system</title>

1990

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Image Retrieval Expert System (IRES), a knowledge-based system for automatic image retrieval, is being prototyped at the University of Arizona (U of A). IRES is to couple with the distributed database system designed for Structured PACS (S-PACS)1 to achieve the high system performance required by radiologists. IRES encompasses the "intelligence" of multiple expert radiologists. The system will predict and migrate the "old" images needed for comparison purposes during radiological exam readings from slower or remote storage devices to the local buffers of workstations. The use of IRES with the PACS Distributed Database System (DDBS) is expected to shorten the PACS system response time, save the time of radiologists in selecting films, minimize the turnaround time of the exam interpretation function, and increase diagnostic effectiveness by providing relevant images automatically. This paper presents the implementation details of this IRES prototype.

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Section: Introductionmentioning

confidence: 99%

<title>IRES: image retrieval expert system</title>

1990

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“…Moreover, the workstation should be able to handle images from different modalities of several formats (sizes and bit-depths) [18]. In order to ensure that the user does not experience undue delay, viewing workstations must have high per formance CPUs, or array processors and ultra fast memory systems [19,20]. The user requirements evolve with experience, thus many researchers have performed evaluations of prototypes to establish initial user acceptability [21].…”

Section: Viewing Worktationmentioning

confidence: 99%

<title>Definition and evaluation of the data-link layer of PACnet</title>

1991

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The most advanced technology has been used to photograph and reproduce this manuscript £rom the microfilm master. UMI films the text directly fi-om the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand corner and continuing fi-om left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book.Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. STATEMENT BY AUTHORThis thesis has been submitted in partial fulfilment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the library.Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of the source is made. Requests for permission for extended quotation from or reproduction of thesis manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his or her judgment the proposed use of the material is in the interests of scholarship. Li all other instances, however, permission must be obtained from the author. SIGNED:. APPROVAL BY THESIS DIRECTORS

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Performance evaluation of a picture archiving and communication network using stochastic activity networks

Sanders

Martinez

Alsafadi

et al. 1993

IEEE Trans. Med. Imaging

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A fiber-optic star-based picture archiving and communication system (PACS) network that is based on a multiplexed passive star local area network with wavelength-division multiplexing (WDM) to provide separate logical channels for transfer of control and image data is discussed. The system consists of an image network (INET), for image transfer at a rate of 140 Mb/s, and a control network (CNET), operating at 10 Mb/s, for mediating the flow of image transfers. INET is a circuit switched network devoted solely to image transfer, while CNET employs the CSMA/CD protocol for bus arbitration. Stochastic activity networks were used to develop a detailed model of the command and image channels. The performance of the system was then evaluated under realistic workload conditions. In particular, a number of important performance variables, including the image response time, command channel delay, and queue length at each type of node and the network supervisor, are estimated. The results (1) show that stochastic activity networks are an appropriate model type for evaluating picture archiving and communication systems, (2) delineate the workload conditions under which PACS may effectively operate, and (3) show that even when these conditions are exceeded, the command channel load remains extremely light.

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Toshiba TDF-500 High Resolution Viewing And Analysis System

Cited by 3 publications

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<title>IRES: image retrieval expert system</title>

<title>IRES: image retrieval expert system</title>

<title>Definition and evaluation of the data-link layer of PACnet</title>

Performance evaluation of a picture archiving and communication network using stochastic activity networks

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