Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Biomedical Engineering Research
Journal Basic Information
Journal DOI :
The Korea Society of Medical and Biological Engineering
Editor in Chief :
Volume & Issues
Volume 10, Issue 3 - Dec 1989
Volume 10, Issue 2 - Sep 1989
Volume 10, Issue 1 - Jun 1989
Selecting the target year
A Study on the Identification of Target Compounds From the GC/MS Data
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 223~228
In this paper, the computerized interpretation of the analytical chemical data, especially GC/MS data, was performed for the purpose of prescreening of the target compounds. First, the data from the analytical instrument was analyzed to get the information about the retention time of the ISTD and the time inteval between the records. Second, the identification of the characteristic ion peaks was performed by calculating the ratio of the heights and the relative slope sensitivity of the characteristic mass abundance.
Noninvasive Detection of Radial Pulse Wave by Fiber-Optic Transducer
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 229~236
This paper describes an idea of design and construction for a radial pulse wave detector, In acquiring arterial pulse signal noninvasively, a new combinational fiber-optic transducer was used which has a detecting part and a sensing part. The mechanism of detecting part is composed of special form of structure that can detect changing pulses in contact with skin, and transmits arterial wall movements to the sensing part. It consists of elastic reflector and optical fibers, which are arranged in a fiber pair. Then, the intensity of the reflected light will be proportional to the displacement changed by inclined reflector. Using this transducer, it expected to make a clinically useful tool for arterial pulse wave diagnosis, especially on the application of "MACK- CHIN" in the field of Korean traditional medicine, since : his transducer has a simple structure and has an easy and clear signal acquisition method.on method.
Synthesis and Physical Properties of Biocompatible and Biodegradable Polypeptide Copolymers(II)
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 237~242
The physical properties and drug release behaviours of polyethylene glycol grafted poly
- benzyl L-glutamate (PEG- g- PBLG), polyethylene glycol crosslinked poly
-benzyl L- glutamate(PEG-c-PBLG), and PBLG homopolymer are compared. PBLG containing PEG segements showed higher wettability and larger enlongation than PBLG homoplymer, but lower elastic modulus. The release rate of rhodamine is strongly influenced by the wettability of the polymer. Rhodamine is more rapidly released from PEG-c-PBLG membrane having a larger water contact angle than from other polymer having a lower water contact angle. The surfaces of PBLG derivative membranes are modified by substitution reaction using hydroxyalkylamine. The resulting polymer membranes showed hider wettability and swelling ratio than virgin membranes.
A Study Transform Coding of Medical Image Using Adaptive Quantization Method
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 243~252
In this study, medical images, which are X-ray image and CT image, are compressed by the adam live coding technique. The medical images may be treated as special ones, because they are different from general images in many respects. The statistical characteristics that medical images only have in transform domain are analyzed, and then the improved quantization method is proposed for medical images. For chest X-ray image and CT head image, the better results are obtained by the improved adaptive coding technique.
Attenuation Estimation of Soft Tissue by the Entropy Method and Statistical Averaging of Speckle Patterns
Song, T.K ; Park, J.C ; Park, S.B ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 253~260
The time domain methods of estimating the attenuation coefficient are generally based on the analysis of statisical properties of the reflected echoes form an attenuating medium. Hence, it is often required to have a large number of data samples in order to obtain a statistically stable estimation result. In the attenuation estimation problem, this means that many different speckle patterns are required in the spatial resolution volume of an attenLlation image. In this paper, by using the fact that the speckle pattern Is sensitive to the point spread function of the ultrasound beam, we suggest a method to generate the statiscally uncorrelated or slightly correlated data samples in a given region by rotating a linear transducer and carrying out lateral scans for all rotating angles. This technique is applied to the entropy method for attenuation estimation proposed recently by the authors where the performance is verified by experiments using a tissue equivalent phantom.
Characteristics of Aging of Ni-Ti Alloy Used for Implant Fabrications(I)
Cho, Hyung-June ; Lee, Jun-Hee ; Park, Ki-Ryoung ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 261~268
The characteristics of aging of near-equiatomic Ni-Ti alloy has been studied by the three point bend test and the measurement of Differential Scanning Calorimetry(DSC). The DSC is used to measure precise transformation temperatures and the amount of thermal energy required for the corresponding phase transformation. The effort of hardness on aging treatment in saline solution of
was higher for the annealed than solution treated specimens. As the testing temperature inc- rease from under
temperature, the elastic stiffness increased. Almost full recovery can be achieved after bending below Belo outer fiber strain. Total bend recovery decreased gradually as aging time and bend angle is increased.
Foot Strike Simulation by a Slider Type Mechanical Model
Park, Hae-Soo ; Shon, Woong-Hee ; Yoon, Yong-San ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 269~278
The initial impact at foot strike is produced by a slider type mechanical model, which can be measured using a force platform to evaluate various shoes. The lower extremity and foot motion was filmed by a 16mm high speed movie camera and several points on the rear half of the shoe and those near the trochanter and the lateral epicondyle were digitized to provide the linear and angular positions and velocities during impact. With these observed kinematics, a slider type foot strike simulator composed of guide rail and sliding dummy is designed. The simulator system makes the artificial foot of the dummy with running shoe on it to follow the foot strike motion. The dummy has the relevant mass-spring-damper system modeled after McMahon's. The motion of the model is drived by the gravity force and the generated motion alone with the ground reaction forces are monitored by the same procedures afore mentioned producing the initial foot strike impact similar to the onto observed in human gait.
Measurement of Cardiac Output During Treadmill Exercise Using Impedance Cardiography
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 279~284
Measurement of cardiac output during exercise by noninvasive technique is very needed in the area of sports medicine. However there are only two noninvasive techniques, one of which is
subscript rebreathing technique and the other one is impedance cardiography. While
rebreathing technique needs special breathing and metablic steady state, impedance cardiography has motion Uiiau problem. In this study maior sources of the mothion artifact during treadmill exercise was found experimentally to. be the impact caused by each step on the treadmill. Thus special shoes to reduce the impact were developed. These are the shoes with silicon rubber and hard sponge attached to the soles. It was possible to measure cardiac output with the newly developed shoes for Burke protocol whose speed of the treadmill was constant 3.5 miles/hour while it was impossibel with the conventional exercise shoes.
The Possibility of Cancer Diagnosis by Human Serum NMR Measurement
Kim, Yeong-Jin ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 285~288
A characteristic proton NMR signal is found in human cancer serums. The signal is given by
ppm on average. An attempt is made to find a certain correlation between the appearance of the signal and the amounts of CEA and AFP in the serums.
A Statistical Approach to Analysis of Saccadic Eye Movements
Kim, Nam-Gyun ; Kim, Bu-Gil ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 289~292
In this study we propose an approach based on statistical method which use the whole of saccades instead of using a few points of saccades in the quantitative analyse saccades. We computed statistical parameters such as mean velocity, quadratic mean velocity, standard duration, skewness of saccades velocity, flattness factor of saccades velocity, and mean delay by considering eye velocity as a probability density function. The results abtained are the following as ; This parameters showed the same trend like that of the main sequence. They were not biased by the systematic errors due to the arbitrary threshold. They were also less sensitive to noise, which was tested through the model simulation. So they are expected to provide a more comprehensive quantitative description of the dynamic properties of saccade in the diagnostic field.
Image Restoration in Digital Radiography Using Dual Sensor Wiener Filer
Lee, Tae-Soo ; Park, Kwang-Suk ; Min, Byoumg-Goo ; Lim, Jeong-Gee ; Han, Man-Chung ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 293~302
A Dual Sensor Wiener Filter technique was used to improve the image quality of the scanning type digital radiographic system (resolution and SNR). In this method, two images were acquried simultaneously using two sensors with high and low resolution and SNR values. Using the cross Power spectrum between dual sensor outputs of the same chest radiographic image. we design a new type of Wiener Filter and implement it with fast algorithm. We compared the performance of this new dual sensor filter with conventional single sensor filters (Wiener Filter and Parametric Projec- tion Filter) . In simulation studies, it is shown that this new method has SNR improvement of 1-3 dB better than conventional filters.
Estimation of Single Evoked Potential Using ARX Model and Adaptive Filter
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 303~308
A new estimationn mothod of single-EP(evoked potential) using adaptive algorithm and paralnetrlc model is proposed. Since the EEG(eletroencephalogram) signal is stationary in short time interval the AR(autoregressive) parameters of the EEG are estimated by the Burg algorithm using the EEG of prestimulus interval. After stimulus, the single-EP is estimated by adaptive algorithm. The validity of this method is verified by the simulation for generated auditory single-EP based on parametric model.
Development of the Patient Monitor Using Microprocessor
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 309~316
In this paper, the patient monitor consisting of amplifier, scan converter, A/D converter, CRT amplifier, and micro-controller part was developed. This patient monitor measures the patient's 4 states in the hospital such as electro-cardiography, respiration, blood pressure, and temperature. The control and processing methods based on micro-processor employ the flexibility, extensibility and economy over other conventional system. The followings are incorporated in this system. First, record the heart rate trends for 1 and 4 hours respectively. Second, measures the respiration by impedance pneumography. Third, measures the blood pressure with auto-zero balance. Fourth, linesrize the temperatures by bridge method.
Automatic Image Segmention of Brain CT Image
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 317~322
In this paper, brain CT images are automatically segmented to reconstruct the 3-D scene from consecutive CT sections. Contextual segmentation technique was applied to overcome the partial volume artifact and statistical fluctuation phenomenon of soft tissue images. Images are hierarchically analyzed by region growing and graph editing techniques. Segmented regions are discriptively decided to the final organs by using the semantic informations.
Error Analysis Caused by Using the Dftin Numerical Evaluation of Rayleigh's Integral
Kim, Sun-I. ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 323~330
Large bias errors which occur during a numerical evaluation of the Rayleigh's integral is not due to the replicated source problem but due to the coincidence of singularities of the Green's function and the sampling points in Fourier domain. We found that there is no replicated source problem in evaluating the Rayleigh's integral numerically by the reason of the periodic assumption of the input sequence in Dn or by the periodic sampling of the Green's function in the Fourier domain. The wrap around error is not due to an overlap of the individual adjacent sources but berallse of the undersampling of the Green's function in the frequency domain. The replicated and overlApped one is inverse Fourier transformed Green's function rather than the source function.
An Automatic Extraction of the Lung Region in X- Rays
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 331~342
This paper presents a new algorithm that extracts lung region in X-Rays and enhance.j the region. Comparing to prior algorithms that enhance whole X-Ray image, this algorithm leads more effective results. For this algorithm extracts lung region first, and enhances the lung region excluding parameters of other region. For choosing optimal threshold, we compare OTSU's mothod with the proposed method. We obtain lung boundary using contour following algorithm and Rray level searching method in gray level rescaled image. We Process histogram equalization in lung region and obtain enhanced lung image. By using the proposed algorithm, we obtain lung region effectively in chest X-Ray that need in medical image diagnostic system.
Classification of ECG Arrhythmia Signals Using Back-Propagation Network
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 343~350
A new algorithm classifying ECG Arrhythmia signals using Back-propagation network is proposed. The base-line of ECG signal is detected by high pass filter and probability density function then input data are normalized for learning and classifying. In addition, ECG data are scanned to classify Arrhythmia signal which is hard to find R-wave. A two-layer perceptron with one hidden layer along with error back-propagation learning rule is utilized as an artificial neural network. The proposed algorithm shows outstanding performance under circumstances of amplitude variation, baseline wander and noise contamination.
Development of Portable Arrhythmia Monitor Using Microcomputer ( II )
Lee, Myoung-Ho ; Ahn, Ja-Bong ; Park, Jang-Choon ;
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 351~360
This paper describes the design of portable arrhythmia monitor and associated algorithm for automated diagnosis based-on microcomputer in the ambulatory ECG recording, analysis, and transmitting to a hospital host computer immediately through the telephone system. The device differs from Molter recorder in that it does not store normal ECG signals but captures and alarms the ECG during suspected abnormal periods and selected temporal epochs to a central hospital site. This porta file arrhythmia monitor makes use of a general purpose computer and software will be changed to meet the custom requirements of individual physicians and patients. At present it is very obvious that each cardiologist has his own method of analyzing ECG recordings and utilizes past experience more than the firm quantitative analysis of data.
Design and Development of Motor Nerve Conduction Velocity Measuring Device Based on Microprocessor
Journal of Biomedical Engineering Research, volume 10, issue 3, 1989, Pages 361~364
A PC-based motor nerve conduction velocity measuring system was designed and constructed. The system was composed with an EMG preamplifier, a stimulator, an Apple II plus microcomputer and an 8 bit AD converter. The system was primariliy intended to screen motor nerve difficulties of industrial workers. This system can acquire, store and display the waveforms of evoked potentials. The PC-based system is expected to increase the versatility and applicability as well as to reduce the system cost.