# IEEE Transactions on Biomedical Engineering

## Filter Results

Displaying Results 1 - 17 of 17
• ### President's message

Publication Year: 1976, Page(s): 181
| PDF (1285 KB)
• ### Identification of Human Chromosomes by Using Integrated Density Profiles

Publication Year: 1976, Page(s):182 - 192
Cited by:  Papers (23)
| | PDF (3669 KB)

The discovery of new stains for chromosome preparations has made useful automated chromosome analysis possible. Appropriate descriptors for use in this process must be found and tested. Data compression using integrated intensity and density profiles has already proven valuable. View full abstract»

• ### A Mathematical Model of the Vagally Driven SA Nodal Pacemaker

Publication Year: 1976, Page(s):192 - 199
Cited by:  Papers (1)
| | PDF (1898 KB)

A model is developed for the vagal control of SA nodal activity in the heart and consists essentially of a modified Bonhoeffer-Van der Pol (BVP) model of the free-running' SA node and a lumped model of the neural terminations in that region. The model is capable of mimicking both the driven transient behavior of the node in terms of pacemaker and inhibition curves, as well as steady-state entrai... View full abstract»

• ### Use of Non-Linear Programming and Stochastic Modeling in the Medical Evaluation of Normal-Abnormal Liver Function

Publication Year: 1976, Page(s):200 - 207
Cited by:  Papers (17)
| | PDF (1571 KB)

A model for Rose Bengal transport through the hepatobiliary system has been developed, and non-linear programming techniques have been used to derive the model's parameters according to actual patient data. The model is then further analyzed as a Markov chain. A system of checks and balances, and measure of error, is discussed. View full abstract»

• ### An Analysis of Chorioretinal Thermal Response to Intense Light Exposure

Publication Year: 1976, Page(s):207 - 215
Cited by:  Papers (19)
| | PDF (1298 KB)

An analytical expression has been obtained for the transient temperature distribution produced when the retina is irradiated by a high-intensity light source. The following factors are included in the analysis: (1) structurally the fundus consists of layers of material which have different physical properties, (2) absorption of energy from the light beam follows the Beer-Lambert law, (3) energy is... View full abstract»

• ### Automated Assessment of Atrioventricular Conduction in the Heart

Publication Year: 1976, Page(s):215 - 219
Cited by:  Papers (1)
| | PDF (1132 KB)

After a pacemaker impulse passes along the atrioventricular conducting pathway of the heart, that tissue resists subsequent conduction for a time interval known as the effective refractory period.' Effective refractory period (ERP) and transit time of conducted impulses vary in response to drug, hormonal and electrical influences and may be used as indicators of the immediate physiologic state o... View full abstract»

• ### Latent Components in the Electrocardiogram

Publication Year: 1976, Page(s):220 - 224
Cited by:  Papers (3)
| | PDF (967 KB)

A new decomposition technique useful for representing a set of observed electrocardiograms is presented. This decomposition is different from past techniques in the constraints placed on the component waveforms in that they must be positive and start, stop, and overlap in a prescribed manner. The number of component waveforms is dependent on the maximum error tolerated in the reconstruction of the... View full abstract»

• ### Delay Time Models of Population Dynamics with Application to Schistosomiasis Control

Publication Year: 1976, Page(s):225 - 233
Cited by:  Papers (5)
| | PDF (2177 KB)

Replacing the usual principle of conservation of numbers with the equivalent principle of continuity of flow leads to a very heuristic approach to modeling time lags in population dynamics. The approach allows the direct use of unequal time lags without the implicit assumption of a stable age distribution. It is directly applicable to certain endemic and epidemic diseases. Where time lags occur in... View full abstract»

• ### An In Vivo Study of Cardiac Pacemaker Optimization by Pulse Shape Modification

Publication Year: 1976, Page(s):233 - 239
Cited by:  Papers (14)
| | PDF (2822 KB)

This paper is an experimental extension of theoretical work previously published by one of the authors. Results of pacing a canine heart using four different increasing exponential and ramp-like waveforms are presented. It is shown that these waveforms reduce the cardiac threshold energy by as much as 14 percent when compared with a pure rectangular pulse shape and by about 21 percent when compare... View full abstract»

• ### Digital Imaging of Gamma-Ray Sources with Depth Information

Publication Year: 1976, Page(s):239 - 246
Cited by:  Papers (3)  |  Patents (1)
| | PDF (4107 KB)

A digital method for imaging gamma-ray emitting organs recorded through a Fresnel zone plate (FZP) aperture is described. This technique can be used in an almost real-time recording and imaging system to yield quantitative and qualitative cross-section and depth information of the source. Furthermore, this method avoids some of the problems introduced by the usual method of optical reconstruction.... View full abstract»

• ### A Waveform Analyzer Applied to the Human EEG

Publication Year: 1976, Page(s):246 - 252
Cited by:  Papers (13)  |  Patents (4)
| | PDF (1331 KB)

This paper presents an approach to signal waveform analysis in the frequency range of 1 to 50 Hz. The technique is applicable to any waveform which is a single-valued function of time with continuous derivatives. The main application of this system has been on the human EEG. The analyzer, to be described, performs its analysis in the time domain and abstracts wave shape information from the origin... View full abstract»

• ### An Improved Control Algorithm for an Artificial ß-Cell

Publication Year: 1976, Page(s):252 - 255
Cited by:  Papers (19)  |  Patents (2)
| | PDF (615 KB)

With the successful implementation of a computer analog for (ß-cell function to restore normal glucose tolerance in diabetic patients, one of the major obstacles to the ultimate development of an implantable artificial pancreas' was overcome. The next step was to optimize the original algorithm and simplify the operation of the blood sugar control system to make it more amenable to miniatur... View full abstract»

• ### A First Look at the Application of Signal Extraction Techniques to the Analysis of Body Surface Potential Maps

Publication Year: 1976, Page(s):256 - 262
Cited by:  Papers (2)
| | PDF (1123 KB)

Partial body surface potential maps from both normal subjects and subjects with independently diagnosed myocardial infarcts are visually compared from superimposed plots. A correlation test is devised to distinguish the two groups, with the reference waveform determined by means of a gradient-search algorithm. The results are encouraging, and suggest further investigation of these techniques as a ... View full abstract»

• ### A Flexible Renewal Process Simulator for Neural Spike Trains

Publication Year: 1976, Page(s):262 - 266
Cited by:  Papers (2)
| | PDF (1110 KB)

Certain neuronal spike trains may be viewed as stochastic, nonhomogeneous point process. Neuronal information may be encoded in the time-varying mean rate of the spike train in some cases. For this purpose the simulator can be modulated by arbitrary time-varying voltage waveforms. View full abstract»

• ### The Urinary Drop Spectrometer - An Electrooptical Instrument for Urological Analysis Based on the External Urine Stream

Publication Year: 1976, Page(s):266 - 269
Cited by:  Papers (2)
| | PDF (1851 KB)

This communication presents the design and an outline of clinical experience with two models of the urinary drop spectrometer (UDS), a noncontact optical instrument used for assessing urological abnormalities based on observation of the external urinary stream. View full abstract»

• ### Comments on "Propagation of Plane Waves Through Two Parallel Dielectric Sheets

Publication Year: 1976, Page(s):269 - 270
Cited by:  Papers (2)
| | PDF (1395 KB)

It is pointed out that only the second dielectric wall of an irradiation chamber determines the voltage standing wave ratio within the chamber. Extension of the general method to more complex models is easily accomplished using numerical methods. View full abstract»

• ### Contributors

Publication Year: 1976, Page(s):270 - 272
| PDF (4925 KB)

## Aims & Scope

IEEE Transactions on Biomedical Engineering contains basic and applied papers dealing with biomedical engineering. Papers range from engineering development in methods and techniques with biomedical applications to experimental and clinical investigations with engineering contributions.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Bin He
University of Minnesota