IEEE Transactions on Biomedical Engineering

Recent evidence suggests that EEG amplitude analysis may be an important method for distinguishing and quantifying alterations in the EEG. This review describes the use of several indices, namely, the standard amplitude, skewness, and kurtosis as sensitive and reliable indices of these amplitude distributions. We have demonstrated that the centile indices for skewness and kurtosis provide a comput... View full abstract»

Over the past 15 years, several algorithms have been proposed and used for closed-loop blood glucose regulation. Their intent is to artificially replace the normal responses of the pancreatic beta cell absent in insulin-dependent diabetes. All of these algorithms calculate insulin infusion rates on the basis of minute-by-minute measurements of whole blood glucose concentration and its calculated r... View full abstract»

Using an axisymmetric inhomogeneous lossy dielectric model of the human cranial structure, calculations yielding interiorabsorbed power density spatial distributions and whole-body cross sections are presented. These computations are preformed by way of a finite element implementation of the coupled azimuthal potential formulation. Results are considered for two angles of plane wave incidence, wit... View full abstract»

An application of statistical pattern recognition technique to the classification of canine duodenal contractile activity resulting from the ingestion of three different test meals, viz. water, acid, and solid, is described. Feature vectors were extracted from the contractile activities recorded by means of strain gauges, and were based on average duration, number, and intensities of contractions,... View full abstract»

The displacement cardiograph (DCG) is a noncontacting device which senses displacements associated with the cardiac cycle through a high-frequency electromagnetic field interaction between a sensing coil and the thorax. The coil is located in the tuning circuit of an oscillator, and perturbations in the oscillation frequency, i.e., frequency quency modulation (FM), resulting from tissue displaceme... View full abstract»

This communication describes a computer-controlled cycle ergometer that generates any dynamic work rate stimulus between 0 and 350 W. The ergometer system features true "zero" watt pedaling and a response time less than 0.5 s. The work rate stimulus is generated via computer software. View full abstract»

Automated classification of ECG patterns is facilitated by careful selection of waveform features. This paper presents a method for evaluating the properties of features that describe the shape of a QRS complex. By examining the distances in the feature space for a class of nearly similar complexes, shape transitions which are poorly described by the feature under investigation can be readily iden... View full abstract»

A system of Compton scatter medical X-ray fluoroscopy is investigated in this research which uses a specially constructed flying spot X-ray tube. The imaging system uses a narrow pinpoint X-ray beam which scans an object in near real time and creates a penetrating frontal view radiograph of variable penetration into the object. The results of our initial work with X-ray Compton backscatter imaging... View full abstract»

The magnitudes of the currents returned through each ground electrode fine of a multiple-electrode cochlear implant array were determined during surgical implantations on two patients. These were often found to be distributed widely to points far from the stimulus electrode site. Further measurements made in in vitro solutions demonstrated that the distributions were due largely to the ground elec... View full abstract»

A force platform has been developed, which is capable of measuring postural sway in humans in two orthogonal directions. For each direction, output data consist of total average sway in two frequency bands centered on 0.57 and 2.9 Hz. The device is suitable for use in research or in a clinical setting. View full abstract»