Imaging the world faces a new era _2819 -

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Imaging the world faces a new era

Sinusoidal crossing, image reconstruction is 64 × 64 matrix. Although the spatial resolution of the image Jun reunion diameter of only 5 to 10, but there is a whole section on the fracture showed that early period of fracture healing process for the monitoring of clinical value Chong split. Second, the three joint vascular imaging, which for the surgical operation plan, and is useful for quantitative diagnosis of Ju 'but X, CT and MRI CT are only a few projection. Standford University, reported the United States l, population projection based on a small number of reconstructed three-dimensional images of blood vessels with a branch of the reconstruction algorithm, is interesting. '2. ECG signal processing article Diego 54, the highest in the first issue of each specific plan. Research on the ECG is still enduring, is due to heart disease has always been lame on the very serious threat to A, C signals covering a wide range. Here far as the weak ECG Extraction briefly introduced. The weak ECG signal has two main components:. . . (I) - Power of the late potential (Lat Cameroon Pot ~ ntia1) extraction. In the late potential after the QRS transition has important clinical value Mei Kuwana, especially after acute myocardial infarction shoes, in the hospital or after discharge, the need for monitoring Ba. But the late potential is very small, extraction difficult. It was suggested that an average of ~ kinds of optimization techniques, ~. Ba S · It is different from the previous best by a weighted average method, but according to the normal distribution of the noise variance is determined by the value of more than Kan's choice of the second sample. Kan emulated, there are two values: one is the value of fixed Kan, side, such as taking lOV. The other is taken as adaptive noise limit criterion type: Ⅳ L = anus, This can increase the average effect. Also proposes the application of wavelet transform (WaveletTransform) Extraction of late potentials, as follows: Let the signal for the S (), select ten analytic function git) (for the complex function), the wavelet transform function w (a, 6) as convolution function: handsome, ancient () d as the conjugate. If written as a function of the frequency domain, so that S (,) ≠ S (), G (,)-- g (), then there is W (a, 6) = alS (,) G (port,[link widoczny dla zalogowanych],) P / d / J where a is the coordinate scaling parameter, b for the phase shift parameters. Desirable g (f): P'e called, ‰ 5.3rad / s. Resulting in 12bit, 1kHz to 5kHz sampling frequency of A / D, the conduct of clinical trials, no late potentials in the normal controls, while in the patient, the proper choice of coefficients can be extracted from a significant late potentials. (2) His bundle electrogram is the extraction bundle appears before the QRS wave weak position, the rate of only about 1 ~ 101 ~ V, can be used to diagnose clinical disorders and other diseases, cardiac conduction, great value. However, the temporal coherence have been average or cumulative average of the examination space guillotine methods are not satisfactory, it was suggested that temporal adaptive processing methods applied to extract the His bundle electrogram. The methodology is to take two in the chest lead signals, one as the main input adaptive systems, and the other as a system reference input. As the two lead ECG signal transmission is related to people, while the noise is uncorrelated, so the adaptive system can be offset by ECG, from the adaptive filter output will be close to ECG, signal to noise ratio can be greatly improved, it is clear that bundle electrogram. This view, the weak ECG position continues to improve the extraction method. * In recent years, neural network research Biao attracted domestic and foreign scientists in many disciplines of common concern, the United States, the ugly, has set off a boom in Western Europe, who are likely to play a major breakthrough j 【side paid the emerging disciplines. 50's three-tier structure proposed by Rosenblatt, kinds of neural network simulation circuit model Biao, 1985, the United States to produce 256 pieces of IC neurons, and once again set off a wave of neural network research. American Defense Board established in 1988 by 8-year plan, I also invest 400 million U.S. dollars, Japan, West Germany, it is stepping up research of this project. In this meeting, 22 papers related to neural networks. All of this should be j 【from our attention. here, it may introduce a neural network used in heart signal data compression fishing papers. you know, Holter system, using the original tape recording, and later studied intelligent Holter system, but because of arrhythmia discrimination hope e next turn your computer on page 91) * 84 *

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