A computer information system for the OR suite.
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Computers↗
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Results for “Computer Systems”
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Three-process model of supervisory activity over 24 hours.
OBJECTIVES: This study used endogenous and exogenous factors to develop a model for sampling supervisory activity that implied consulting numerous data on computer systems. METHODS: The study was carried out in an automated workshop of a chemical plant. Five crews worked on a 3x8 hour shift system, with changes at 0400, 1200 and 2000. Each team included 2 experienced controllers who supervised the process from computer systems in a control room. Starting and ending duty at the same time as the operators, the researchers used real time to code of all the screen pages selected on the computers by 8 controllers (from 4 teams) over 18 shifts. RESULTS: The time-of-day fluctuations of the call frequency confirmed the existence of endogenous factors (biological rhythms or fatigue), but they cannot explain all the variations observed. The modeling of the data yielded the following 3 explanatory factors: (i) the cognitive demands of the tasks, as an external factor, mainly concern the impact of shift changeover characterized by a strong peak of information gathering at the beginning of the shift, even at 0400; (ii) the shift duration appears as a "fatigue" factor and reflects a rapid reduction of information gathering over the shift; (iii) circadian rhythms are characterized by a minimum of activity at night and a maximum in the afternoon. CONCLUSION: In other similar work situations, in addition to an essential work analysis, our model could help the design of shift duration or schedules for shift changeover.
Adult↗
[Automated system for processing medical rhythmic information].
The computer-aided (ES computer) system for acquisition, storage and sampling for any set of signs and processing of rhythm-based data is developed. The software is based on the operation system ES computer by using a time share system and a system for database control "Spektr". The informative database contains "The map of chronobiological examinations" and "The meteorologic map".
Chronobiology Phenomena↗
A computer-controlled system for measuring an impedance locus of palmar skin.
Compared to direct current (DC) methods, alternating current (AC) methods have rarely been used in the field of electrodermal research. AC methods, however, have the advantage of enabling analysis of electrodermal activity, including capacitive properties. To establish an easy AC method, a computer-controlled measurement system was developed in this study. The system can automatically measure impedances at three different frequencies on the basis of phase detection and determine an impedance locus. Performance tests using RC parallel circuits showed that the system has sufficient accuracy. Palmar skin impedance was also measured and temporal changes in parameters of the circular arc law were investigated. It was demonstrated that the system can obtain impedance data with a data acquisition time of less than 0.2 s and can easily determine an impedance locus. It is expected that the new system, due to its high level of accuracy and ease of operation, will be used as an AC method of measuring electrodermal activity.
Adult↗
DIADS: computer-based system for development of school drug prevention programs.
The Drug Information, Assessment and Decisions for Schools (DIADS) is a computer-based information and decisions support system for the development of school drug abuse prevention programs. DIADS provides access to a cost-effective planning resource that has information to programs about alcohol, other drugs, and prevention. Also, DIADS helps the school assess the effectiveness of its current prevention efforts using an expert-generated school assessment model containing fourteen factors. Feedback from the assessment provides suggestions for improvements in current prevention programs. DIADS guides the selection of future activities and helps in program planning. Pilot test of DIADS at several sites indicates school personnel find the information on DIADS helpful, timely and easy to access.
Curriculum↗
Computer-operated systems for the retrieval of information from current biochemical literature.
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Biochemical Phenomena↗
[An imaging system and computer processing of digital images from the Tesla BS500 transmission electron microscope].
Original digital image acquiring system for electron microscope TESLA BS500 was developed. Optical image from yttriumgarnet monocrystal was captured by TV CCD bottom mounted camera and processed by computer with software Video TIP. Repeated image acquisition enabled substantial improving of signal/noise ratio. Image element of 42 microns diameter was achieved. The system is ready for additional innovation, especially with a high performance CCD camera.
Image Processing, Computer-Assisted↗
Computers in nuclear imaging.
Currently, the practice of nuclear medicine in larger institutions is practically dependent upon the availability of a computer system. Gamma cameras are connected online to mini-computer systems which have the ability to collect image data in a number of different formats. This permits sophisticated analysis techniques to be used so that quantitative data may be extracted from the images. In some instances, as in tomography, data are reconstructed into images to give views of organs that would otherwise be impossible to obtain.
Computers↗
The stability of mechanical calibration for a kV cone beam computed tomography system integrated with linear accelerator.
The geometric accuracy and precision of an image-guided treatment system were assessed. Image guidance is performed using an x-ray volume imaging (XVI) system integrated with a linear accelerator and treatment planning system. Using an amorphous silicon detector and x-ray tube, volumetric computed tomography images are reconstructed from kilovoltage radiographs by filtered backprojection. Image fusion and assessment of geometric targeting are supported by the treatment planning system. To assess the limiting accuracy and precision of image-guided treatment delivery, a rigid spherical target embedded in an opaque phantom was subjected to 21 treatment sessions over a three-month period. For each session, a volumetric data set was acquired and loaded directly into an active treatment planning session. Image fusion was used to ascertain the couch correction required to position the target at the prescribed iso-center. Corrections were validated independently using megavoltage electronic portal imaging to record the target position with respect to symmetric treatment beam apertures. An initial calibration cycle followed by repeated image-guidance sessions demonstrated the XVI system could be used to relocate an unambiguous object to within less than 1 mm of the prescribed location. Treatment could then proceed within the mechanical accuracy and precision of the delivery system. The calibration procedure maintained excellent spatial resolution and delivery precision over the duration of this study, while the linear accelerator was in routine clinical use. Based on these results, the mechanical accuracy and precision of the system are ideal for supporting high-precision localization and treatment of soft-tissue targets.
Calibration↗
[Cell image analysis on the PDP-12 computer: a software system for processing the image information from a scanning microscope photometer (author's transl)].
A system of computer programs is introduced which allows image analyzing of cytological or histological preparations. The software system was especially developed for a microprocessor (PDP-12, Digital Equipment Corporation) which is often implied in connection with microscope photometers (SMP 05, Carl Zeiss). Users need not to know anything about computer programming because the computer gives the necessary orders via CRT-display or printer. The different descriptors as they are available after different cytochemical or histochemical staining procedures are combined to a pattern vector which is to be a numerical equivalent of cell morphology. A novel method in numerically describing the fine structure of cell nuclei is emphasized. Different cell populations are compared by means of a simplified multivariate discrimiatory analysis. All programs are written in assembler language and they are stored on LINC tapes (Digital Equipment Corporation). Copies of system tapes respectively tapes with the source programs are available from the authors on sending of blank magnetic tapes (2,000 blocks marked). Description and print out of individual programs are published in the dissertation cited in References. Changes and additions of the system which have been done mean-while will be summarized, and lateron such summaries are available on request.
Cell Nucleus↗
A data model for intensive care.
The paper describes a model of clinical management data in a typical general intensive care unit, intended as a generic database specification for advanced intensive care computer systems. The data model was developed as part of the INFORM project. The INFORM project is summarised and the relevance of the data model to the objectives of the project are discussed. An object oriented extension to the entity relationship diagram methodology is presented. The methodology is illustrated with reference to some specific aspects of the data model including: the principle clinical entities; classification of patient state related data and the homogeneous patient group system. It is suggested that such a model will contribute to the better understanding of the data in the system, to the better design of future intensive care computer systems and to the setting of standards for medical data.
Decision Support Systems, Management↗
Computerization: the future of dental practice management.
Although computers are currently used in many dental offices, they are often simply PCs used for word processing or billing. There are some clinical dental computer systems in use, but, in the past, software limitations kept these systems from being integrated into practice management solutions. Dental computer systems in the future will combine clinical and practice management information, as well as marketing information, for optimal patient care with practice growth as a benefit.
Humans↗
Applying a grid technology to protein structure predictor "ROKKY".
This paper describes a sub-project of BioGrid project called "HTC (High Throughput Computing) group." Generally, a protein structure prediction which requires large amount of computational resources is done by trial-and-error method. HTC group have been developing a high throughput computing system with a flexible workflow handling mechanism for a protein structure prediction. In this paper, we show how to apply our high throughput computing system to the protein structure predictor called "ROKKY."
Computational Biology↗
Computer-aided prototype system for nose surgery.
Rhinoplasty, or surgery to reshape the nose, is one of the most common of all plastic-surgery procedures. Rhinoplasty can enhance a patient's appearance and self-confidence, may also correct a birth defect or injury, or help relieve some breathing problem. In this paper, we present a three-dimensional (3-D) surgical simulation system, which can assist surgeons in planning rhinoplasty procedures. This system employs computer graphics and image-processing techniques for the simulation of a rhinoplasty. Although the presented algorithms themselves are not new, the proposed system exploits the new idea to apply 3-D morphing for rhinoplasty, and simulation results are useful for the physicians. According to patients' expectation of what they would like their noses to look like, our system simulates expected results. Our tools provide quantitative measurements of a nose structure. Using these quantitative results, surgeons can arrange appropriate preoperative plans for patients. Finally, experimental results and experiences are reported to evaluate the usefulness of the proposed system.
Computer Simulation↗
[Computerization of medical technology].
The object of computerization is practical medical technology which is regarded as a complex of methodological and instrumental support for maintaining a physician-patient dialogue. The methodological support remain to be a prerogative of medicine and, consequently, relatively conservative. The instrumental support (as an aid for the methodological one) permits a constant extension of its stores. That is why the present paper considers the computerization of medical technologies in the context of extension of instrumental support. The replacement of paper technology in medicine by computerized one should primarily increase the level and quality of obtaining information on the patient and create high-levelled computerized systems: diagnostic monitoring, reference, expert ones. The creation of automatic working places for specialists of therapeutical-and-prophylactic institutions (TPI), their incorporation into the local computer systems of functional departments form an instrumental basis for informatization of the whole TPI. A scheme of the computer system of a resuscitation and intensive care is given as an example.
Computer Communication Networks↗
A patient-initiated system for preventive health care. A randomized trial in community-based primary care practices.
OBJECTIVE: To test the effectiveness of a patient-initiated, touch-sensitive computer system (TSCS) for improving screening rates for cancers of the breast, cervix, colon and rectum, and oral cavity. DESIGN: One-year, randomized, controlled trial with primary care practice as the unit of analysis. SETTING: Sixty primary care practices, randomly recruited from 329 nonteaching practices in a southeastern state. SUBJECTS: Random sample of the medical records of 50 male and female adult patients before intervention and 50 adult patients after intervention in each practice and a random sample of 507 TSCS users. INTERVENTIONS: Touch-sensitive computer system and a registered nurse who served as liaison to the study practices. The TSCS provided patient-specific preventive service recommendations and facilitated work flow to increase the completion of these interventions. MAIN OUTCOME MEASURE: Average change, adjusted for health maintenance examination (HME) and use of the TSCS, in the proportion of eligible patients undergoing screening mammography, clinical breast examination, digital rectal examination, fecal occult blood test, flexible sigmoidoscopy, Papanicolaou smear, and oral cavity examination. RESULTS: We observed a significant increase in the completion of screening mammography (6.6%; P < or = 0.5) and clinical breast examination (6.1%; P < or = .01) in women 50 years of age and older, particularly for those who had an HME during the study year. CONCLUSIONS: Patients who have HMEs are more likely to receive cancer screening; however, a computer-based system for preventive services can contribute to improvement in screening. Among those patients who did not have an HME, TSCS users had higher rates of breast cancer screening than nonusers.
Adult↗
An interactive computer graphics system for the design of molded and orthopedic shoe lasts.
The Department of Computer Science at North Carolina State University, with support from the Department of Veterans Affairs and National Aeronautics and Space Administration (NASA) Langley Research Center, has developed an interactive graphics program for the development of shoe lasts from digitized images of feet or digitized images of commercial shoe lasts. The program runs on a Sun 3/260 computer with a TAAC-1 graphics accelerator. The program contains operations for region addition and deletion, techniques for narrowing the ankle area, methods for toe extension, operations to allow for shoe inserts, etc. Once the operations by the user are complete, the program will resample the resulting last in a 512 x 512 array. The user is then allowed to select an error tolerance which will guide a data reduction program to represent the last as Coons patches. These patches are then transmitted to a milling machine which will cut the last.
Computer Graphics↗
Preliminary results achieved by a computer-assisted system for controlled balloon dilatation of coronary and peripheral arteries.
In percutaneous balloon angioplasty the extent of trauma to the vessel as determined by slope of balloon inflation, peak pressure, and inflation time is crucial to the success of the intervention. These parameters are still not standardized and hence open to the operator. To elucidate this problem, a computer-assisted PTCA system (CAPS) was developed. CAPS is composed of a motor driven unit, a central processing and power unit, and a notebook. A syringe is clamped onto the motor unit and connected to a pressure gauge. CAPS may be linked to all types of balloon catheters. The notebook allows for preselection of peak pressure, slope of pressure increase, and inflation time. During balloon inflation, adjustments are made in a closed-loop system. On a screen, the inflation process is supervised in digital numbers and analogous curves. After the procedure, patient data and inflation curves may be recalled for analysis. In conclusion, CAPS by controlled inflation theoretically may reduce the mechanical trauma to the arteries. Further refinements should aim at gaining information on the lesions' characteristics and on the dilatation process itself.
Angioplasty, Balloon, Coronary↗