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At least 37 records · Page 2Linked to original sources
PubMed1986

Analysis of fetal activity and maternal and fetal heart rate using a laboratory minicomputer.

Using a PDP-11 minicomputer, a system was developed for real-time acquisition of fetal breathing, body movement, and heart rate data. Analogue event pulses were input electronically to a DR-11 16 channel A/D, D/A interface and the event times were measured using an AR-11 real-time clock. Event times were stored for comprehensive off-line analysis and useful data summaries were also provided on-line. The on-line printouts enabled investigators to examine the quality of the data at the time of the study. The system has resulted in faster data acquisition and analysis and greater accuracy of measurement.

Computers↗
PubMed1984

Fully automatic quantitative analysis of alpha-radiation spectral data using a minicomputer.

Fully automatic computer programs for the analysis of alpha-spectroscopy data have been developed and installed on a PDP-11/45 minicomputer at the Eastern Environmental Radiation Facility (EERF) of the U.S. Environmental Protection Agency (EPA) in Montgomery, AL. The programs presently in use evaluate the activities of the U, Pu and Am nuclides of interest to EERF. A mathematical enhancement of the spectra processed makes reliable determination of nuclide gross counts possible without the human interaction previously necessary at the laboratory. A number of safeguards that attempt to detect conditions (anomalous chemistry, etc.) which may cause invalid analyses are provided in the programs.

Alpha Particles↗
PubMed1988

Computer-assisted TPN calculations: time savings and improved accuracy associated with use of a minicomputer.

A pediatric TPN computer program, written in Cobol 74 machine language, was developed for use on a minicomputer system. The program calculates the volume of each ingredient needed to prepare a pediatric TPN solution, generates a recipe work card and labels, calculates clinical monitoring information for each patient and develops a clinical monitoring profile for the pharmacist to use in monitoring parenteral nutrition therapy. Use of the program resulted in a significant reduction (71%) in the time needed ot complete TPN calculations. Significant decreases in calculation and labeling errors were also realized.

Computers↗
PubMed1990

[Determination of virus concentration using a minicomputer].

Described in this paper is a physical method by which to determine virus concentrations, including ultracentrifugation of a sample through a saccharose gradient and subsequent analysis of tubule content by means of a flow photometer. Here before, the curves thus obtained used to be graphically evaluated by means of stencil plates. Direct recording and processing of the extinction-time curve by means of a KC 85/1 minicomputer have substantially improved accuracy of results. Time consumption has been reduced, and reading as well as calculating errors have been entirely ruled out. Repetition of determinations confirmed that virus concentrations could be determined at an accuracy of four to seven percent.

Animals↗
PubMed1985

[Active rhinomanometry with a minicomputer and printer].

A rhinomanometer is described which is coupled with a minicomputer and printer. The experimental results can be presented on a monitor and printed out via the printer. Besides plottings of rhinomanograms it is also possible to print out V1.5 values, the side difference, the decongestion effect, and other data of the patients in tabular form. Several measurements of the same patient, e. g. before and after decongestion, can be plotted and compared simultaneously. A nozzle system or a mask can be used. The advantages for the clinical application of this automatic computer system are described.

Adult↗
PubMed1979

[Quantitative echocardiography using a minicomputer (author's transl)].

Echocardiography should not remain merely qualitative but every effort should be made to make it quantitative, providing the clinician with numerical values. Three items are necessary: a graphic table, a minicomputer and an electronic reprograph, all small in size. The tracings obtained in TM technique are digitalised using the graph table, and the computer provides the results in the form of listings and graphs. The latter are of two types: --some are used for the analysis of the respective chronology of the various phenomena: left ventricular diameter and its normalised derivative, apexocardiogram or carotid pulse, movement of the greater cusp of the mitral valve, thickness of the myocardium, heart sounds; --the others are used for study, with the aid of an X-Y representation in the form of loops, of variations in one phenomenon in relation to the other. Deformation of such loops makes it possible to detect poor synchronisation between 2 phenomena.

Computers↗
PubMed1983

[Clinical use of a minicomputer in the evaluation of chemico-clinical parameters in the diagnosis of hepato-biliary-pancreatic diseases of surgical significance. 3 methods compared].

Bayes theorem; multivariance analysis, and the discriminating function of Mahalanobis applied to sixteen laboratory examinations employed in the diagnosis of diseases of the extrahepatic bile ducts and pancreas gave the following results: 1) the weight of each test was first measured in general terms, and then with regard to different levels of differentiation, with a classification in decreasing order in each case; 2) little redundancy was noted, and few examinations were of relatively negligible importance; furthermore, combinations of several tests did not lead to positive results; 3) reclassification according to the formula of Bayes and by means of the discriminating function proved sound supports for clinical decision, since they provided 70% and 80% of exact classification respectively; 4) the importance of the minicomputer in the construction of experimental diagnostic models was substantiated.

Biliary Tract Diseases↗
PubMed1983

A minicomputer-based perinatal/neonatal telecommunications network.

A minicomputer-based telecommunications network has been developed to link all of the state's nine tertiary neonatal intensive care units in order to provide information on availability of neonatal and maternal beds. The information is updated automatically on computer terminals located in each neonatal intensive care unit every two hours by a complete system poll (350 polls per month). This information has been found to be accurate 95% of the time. Through a computer simulation, this network is shown to provide a significant reduction (P less than .0005) in the number of referral telephone calls, and thus the time, required to locate a bed within the state for obstetric or pediatric patients needing transfer. In addition, this network has provided a data base to aid in local, regional, and statewide planning for perinatal facilities. A 6-month summary of the data indicated that for 16% of the system polls, less than two neonatal intensive care units could accept outside referrals, demonstrating frequent severe statewide restrictions for care of high-risk patients. The total operating budget for the most recent fiscal year was less than +25,000, which is far less than that of manual 24-hour central telephone operator systems providing similar services. This telecommunications network is a cost-effective answer to the common problem of limited regional perinatal resources.

Computers↗
PubMed1981

Quality control of scintillation cameras using a minicomputer.

A minicomputer-based technique compiles objective indicators of scintigraphic system performance. The evaluation begins with the acquisition of a single image of an orthogonal hole pattern from which quantitative and regional measurements of point-source sensitivity, spatial resolution, and spatial linearity are derived. Two computer programs offer the user different but complementary features. The first program is the basis of an evaluation performed by a technologist for purposes of quality control. Operator intervention is minimal, and the entire protocol, including data acquisition and processing, can be completed in 20 min. The results are automatically compiled and displayed as graphs showing 100 consecutive sets of daily performance measurements. A second computer program is designed as an interactive diagnostic and research tool to display measurements as histograms and functional images. The operator can use the program to determine the quantitative and spatial characteristics of the system's intrinsic performance measurements made during the quality-control evaluations.

Computers↗
PubMed1980

Minicomputer updates food prices weekly.

A food production management system uses a minicomputer that "recosts" standardized recipes to allow menus to be changed weekly in reaction to fluctuations in food costs.

California↗
PubMed1975

Operant conditioning and behavioral analyses using a minicomputer.

An operant conditioning and data analysis software system was developed for use on a PDP-12A minicomputer. The operant software functions in quasi time-sharing fashion to control and acquire data from any peripheral device that operates in the binary mode. In addition to independently running different experiments in near simultaneous fashion, the program also provides information on the current status of each experiment using a cathode ray-tube display. Response data from each experimental subject is stored on magnetic tape and analyzed, off-line, by the data analysis portion of the software system. A discussion of the operation of this system is given for one possible application: visual discrimination training.

Animals↗
PubMed1978

A minicomputer system for display and rate analysis in vectorcardiography.

A system has been constructed for recording vectorcardiographic signal with a FM taperecorder. Off-line AD-conversion and analysis of rates and magnitudes of partial vectors are made with a minicomputer. The reason for studying particularly initial vectorrates is that according to our hypothesis these contain valuable information for classification of certain cardiac arrythmias according to supraventricular or ventricular impulse focus. Preliminary results confirm the hypothesis. In vectorcardiography one difficulty is to give an easily comprehensible presentation of the vectorloop. In this study a method for '3-dimensional' display has been developed, using a graphic display processor and varying intensities of the beam. The system is to a high degree man-machine interactive.

Arrhythmias, Cardiac↗
PubMed1978

An approach for physiological signal processing by laboratory minicomputer.

Physiological signal-processing instrumentation including the digital oscilloscope is becoming more dependent upon the microprocessor. Minicomputer software has been developed which demonstrates data-processing approaches that should be considered for incorporation into the firmware of digital oscilloscopes. This core-resident software called DATAC operates in an interpretive mode and provides such features as digital signal editing, filtering, and basic processing including differentiation and integration.

Computers↗
PubMed1979

[Results of employing single crystal gammacamera and minicomputer in the first tracer passage to determine left-ventricular ejection fraction and wall motion (author's transl)].

Single crystal gammacamera and minicomputer were employed in 71 patients to determine left-ventricular ejection fraction (EF) (17 mCi 99mTc-HSA; 30 degrees RAO projection) by means of the first tracer passage. In 30 out of these patients, ventricular wall motion could be analyzed additionally because later on the gammacamera was equipped with a converging collimator. Comparison with cineventriculographically determined EF values revealed a good correlation (r = 0.91), not depending on left-ventricular wall motion pattern. Hereby, with first transit, high EFs were computed somewhat lower and low EFs were found somewhat higher. This non-limiting discrepancy is closely related to the influence of paracardiac "background"-radioactivity. Comparative analysis of segmental wall motion demonstrated agreement in 83% of the 90 segments examined. Therefore, it can be confirmed that performance of the first tracer passage for a evaluating segmental wall motion must not mandatorily be done with a multicrystal camera.

Adult↗
PubMed1975

Optimization of dose distributions in moving-strip therapy using a minicomputer.

Optimized 60-Co dose distributions for the moving-strip technique were calculated for 3 patients using a PC-12 minicomputer program which corrects for field obliquity and changes in patient thickness. Beam profiles were measured using an ionization chamber in a water phantom. A Masonite phantom was constructed to simulate a patient and used to measure optimized and unoptimized midplane dose distributions by thermoluminescent dosimetry. Measured midplane doses agreed with computer-calculated doses within experimental error. The computer optimization technique improved dose uniformity, reducing the midplane dose variation from plus or minus 12-13% to plus or minus 3-4%.

Cobalt Radioisotopes↗